Research-based buyer guide
Free A/B Testing Tools for Startups and Small Businesses
Compare genuinely free experimentation plans, quotas, technical requirements, and upgrade triggers before choosing a tool for a small team.
By Atticus Li · Updated 2026-11-12
The short answer
A free experimentation plan can be useful when your team can implement assignment and measurement. GrowthBook, PostHog, and Statsig are candidates for product teams; Firebase belongs on a mobile-app shortlist. Optibase is also worth evaluating for a marketer-led website workflow within its published free allowance. These plans use different billing units and implementation paths.
Published by GrowthLayer, which sells an experiment repository. Recommendations are source-based editorial judgments, with no hands-on benchmarking or overall star rating. Read the selection method.
Start with your team’s situation
A startup with someone who can maintain instrumentation
Compare the actual workload, metric pipeline, and upgrade trigger. Free seats or flag checks alone do not tell you whether experiment analysis is included.
A marketer testing an existing website
Check Optibase’s tested-user allowance, setup requirements, and the editor capabilities included in the free plan. Confirm the actual CMS workflow before committing.
A native app already using Firebase
Evaluate the Firebase-specific experiment workflow and dependencies. This is a different implementation from changing a website headline.
Compare the practical requirements
Alphabetical, not ranked. Team and maturity fit are editorial judgments. Open each evidence section for plan qualifications, sources, and customer-reported experiences.
5 tools shown
| Tool and job | Plan and free eligibility | Implementation | Fit and main compromise |
|---|---|---|---|
| Firebase Experiment execution | A/B Testing no-cost; Remote Config has daily fetch allowance and overages Free plan includes this product’s core workflow Checked 2026-11-12 | Engineering-supported Ad hoc, Repeatable, Managed | App team already using Firebase Analytics and Remote Config. Conditional on the required implementation and qualifying plan being confirmed. Tradeoff: Daily Remote Config fetch limits and release/SDK behavior matter |
| GrowthBook Experiment execution | Starter $0; Pro $40/seat/month Free plan includes this product’s core workflow Checked 2026-11-12 | Engineering-supported Repeatable, Managed, Compounding, Evidence-led | Engineering/data team owning its warehouse integration. Conditional on the required implementation and qualifying plan being confirmed. Tradeoff: Visual editor is paid; data-service and operating costs remain |
| Optibase Experiment execution | Free 10K tested users/month; Basic $79/month or $790/year Free plan includes this product’s core workflow Checked 2026-11-12 | Marketer-led after setup Ad hoc, Repeatable | Marketer testing an existing compatible website. Conditional on the required implementation and qualifying plan being confirmed. Tradeoff: Confirm conversion-event setup, free active-test allowance and cap behavior |
| PostHog Experiment execution | 1M flag requests/month free; paid rates start at $0.000100/request Free plan includes this product’s core workflow Checked 2026-11-12 | Engineering-supported Repeatable, Managed, Compounding | Product team already collecting dependable PostHog events. Conditional on the required implementation and qualifying plan being confirmed. Tradeoff: Requests and analytics events have separate meters; visual editor is Beta |
| Statsig Experiment execution | Developer $0; Pro $150/project/month including 5M events Free plan includes this product’s core workflow Checked 2026-11-12 | Engineering-supported Repeatable, Managed, Compounding | Engineering-supported product team wanting hosted analysis. Conditional on the required implementation and qualifying plan being confirmed. Tradeoff: Metered events need planning; free metric calculations stop above quota |
What counts as a free A/B testing tool?
For this guide, a free plan must include a usable experimentation path, rather than only analytics, surveys, or feature flags. A temporary trial is labeled as a trial. Self-hosted software is identified separately because servers, upgrades, backups, and engineering time still need an owner.
Free does not mean unlimited, and unlimited traffic does not necessarily mean unlimited delivery requests or warehouse events. Read the cap in its original unit. Confirm what happens at the limit: charges, stopped analysis, dropped events, or fallback values can each affect an ongoing experiment.
Small business and startup are not technical requirements
A two-person SaaS company with an engineer can operate a different tool from a ten-person service business with a marketing-managed website. Start with the operator, existing site or app, and measurement setup. Do not buy an engineering workflow solely because its subscription is free.
If no one can reliably implement assignment and outcome tracking, use the landing-page guide to evaluate visual tools and builders. Budget for implementation and testing even when the change itself is made in a visual editor. A free plan that stays unused has not solved the decision.
Check whether the experiment can answer your question
Estimate eligible traffic, baseline conversion, and the smallest change worth acting on before selecting a platform. There is no universal minimum-traffic rule. Low volume may make a test take longer than the business can wait, especially when the primary outcome is a rare purchase.
If the expected runtime is impractical, investigate customer objections, repair obvious tracking or usability failures, or test a larger coherent proposition. Changing the software will not create statistical information. Keep the hypothesis and evidence so the next attempt starts from what you learned.
Define the first upgrade trigger now
Write a short exit plan: which usage cap, collaboration requirement, or governance need would force an upgrade? Check whether historical data and experiment definitions can be exported before the account changes. The ability to keep a record of losing and inconclusive tests matters as much as storing winners.
Use one primary metric and a limited set of guardrails for the first experiment. Record assignment, exposure, dates, changes made during the run, and the final decision. A small team can begin with a consistent template; a dedicated repository becomes more useful as histories and owners multiply.
Worked budget: a two-person team using PostHog
Suppose the organization records 600,000 product-analytics events and makes 800,000 feature-flag requests during a month. Each workload sits below its separately published one-million monthly free allowance. That is a $0 allowance scenario for those two products, not a claim that every PostHog service or infrastructure cost is free.
Count all projects sharing the allowance, test exposure and outcome events, and requests generated by repeated checks. Recalculate before increasing traffic or enabling other products. The current source and over-limit qualifications appear below.
PostHog: 1M flag requests/month free; paid rates start at $0.000100/request
Qualifying plan: Free or pay-as-you-go Billing unit: Feature-flag requests; analytics events billed separately Free: 1M flag requests/month, 1M analytics events/month, 1 project, unlimited team members. Commitment: No required annual commitment shown. Overages: Tiered flag-request rates; separate analytics or other product usage may add cost. On the free plan, additional events above the allowance are dropped and flags return a quota-limited default. Pay-as-you-go bills excess usage. Billing allowances are organization-wide, not per project.
PostHog pricingPostHog Experiments pricingBefore buying, check whether your traffic can answer the question. For the experiment design itself, use the landing-page testing workflow.
How we chose the shortlists
First, match the required surface, implementation skills, measurement readiness, governance, and budget. Then compare qualifying plans and the tradeoffs that matter to that team. The shortlists are editorial judgments based on linked sources; equivalent candidates are alphabetical. There is no overall score, paid placement, or inferred feature count.
Vendor documentation supports product and pricing facts. Attributed customer accounts describe reported experiences. The shared snapshot preserves 62 accounts across 12 products, with three to seven accounts per product; other records retain their earlier research dates. The actual sample and access gaps appear with each tool. This is a convenience sample, not representative sentiment. Adjacent product accounts are labeled and do not validate the experimentation workflow. Missing incentive labels remain unknown.
This release is research-based, with no hands-on performance testing. Missing evidence stays unknown. Trials, self-hosted options, and ongoing free plans are different categories. Prices are published plan descriptions, not quotes for your workload; preserve billing units, commitment, and native currencies.
GrowthLayer publishes this comparison and sells an experiment repository. We apply the same evidence requirements to our entry. Some execution vendors also offer history and program-management features; compare those capabilities before adding another tool. Atticus Li operates both GrowthLayer and AtticusLi; shared product facts come from the same dated research snapshot.
Our five-stage maturity model describes operating ability, not company size. See the editorial policy and site methodology for the broader standards.
The evidence behind each choice
Firebase
Sources checked 2026-11-12Firebase A/B Testing with Remote Config
- Recommended when
- App team already using Firebase Analytics and Remote Config. Conditional on the required implementation and qualifying plan being confirmed.
- Main compromise
- Daily Remote Config fetch limits and release/SDK behavior matter
- Consider an alternative when
- Compare LaunchDarkly or Statsig for a broader application feature-delivery workflow.
- What remains uncertain
- No hands-on SDK setup. Do not describe Firebase A/B Testing as mobile-only. Server experimentation, raw export and governance plan entitlements not checked. This judgment assumes the named owner, implementation and qualifying plan. It does not establish actual setup time or measured product performance.
Plan, limits, and ownership cost
A/B Testing no-cost; Remote Config has daily fetch allowance and overages
Free plan includes this product’s core workflow
- Qualifying plan: Spark within quota; Blaze for paid Remote Config usage
- Billing unit: Remote Config fetch requests per day per project
- 100,000 Remote Config fetch requests/day/project free.
- 300 experiments/rollouts per project, including at most 24 concurrently running.
- Commitment: Spark needs no payment method; Blaze is pay-as-you-go.
- Overages: $0.000006/request for daily requests 100,001–10M; $0.000001/request above 10M.
- Remote Config pricing effective September 1, 2026.
- Analytics and application SDK integration required; supporting Firebase/Cloud services can cost extra.
Official plan evidence:Firebase pricingCreate Firebase Remote Config experiments
Documented capabilities and plan qualifications
- Visual editor: Not verified
- Verified workflow changes Remote Config parameters through code; a DOM visual editor was not verified.Create Firebase Remote Config experiments
- Server-side experimentation: Not verified
- Not independently verified in this public-source snapshot.
- Native mobile experiments: supported
- Android and Apple platforms supported; current docs also explicitly support Web.Create Firebase Remote Config experiments
- Export / retained history: Not verified
- Not independently verified in this public-source snapshot.
- Experiment repository: Not verified
- Not established by the sources reviewed. Confirm this requirement before choosing.
- Governance: Not verified
- Not independently verified in this public-source snapshot.
Measurement evidence and unresolved requirements
Documented features do not establish that your implementation or statistical design is valid. Confirm every critical requirement before selecting a tool.
- Assignment and identity: supported
- Remote Config experiments document random assignment; validate identity and version behavior for the intended app.Create Firebase Remote Config experiments
- Exposure tracking: supported
- Optional Analytics activation-event filtering is documented after config activation, but is not supported for web experiments.Create Firebase Remote Config experiments
- Statistical assumptions and stopping: Not verified
- Statistical assumptions and permitted stopping rules were not verified in this snapshot; request the method documentation before launch.
- Guardrails and secondary metrics: Not verified
- Up to five secondary metrics including crash-free users are documented. Automated guardrail enforcement was not verified.Create Firebase Remote Config experiments
Customer-reported experiences
3 attributed accounts in this sample. 3 accessible individual accounts across Software Advice, SoftwareReviews, TrustRadius. Convenience sample, not representative sentiment or independently replicated product tests. Two-platform sampling target met. Shannon G. June 2025 explicitly discusses A/B interpretation. Search snippet can misassociate next reviewer Jason M.; opened page establishes Shannon attribution. Alejandro R. specifically mentions A/B testing and Remote Config. Other generic auth/database reviews excluded. Direct A/B use for push notifications and subscription trial period; historical 2020 evidence. Reviewer only excited to explore A/B testing; not actual experiment experience.
Shannon G. · 2025-06
Role: Information Technology. Company size not visible.
Reported benefit: Mobile analytics connects to Remote Config.
Reported limitation: Found experiment interpretation insufficiently clear.
Platform labels: Validated Review; Verified Reviewer. Incentive disclosure: Nominal gift card.
Platform: SoftwareReviews
Review locator: Shannon G.; 2025-06
Date precision: month only; the day was not exposed
Direct experimentation account; not an independently replicated test
Account checked: 2026-11-12
Statistical-feature complaints are reviewer perceptions, not verified current product limitations.
Firebase individual customer accounts (author/date locators in reviews)
Alejandro R. · 2023-11
Role not visible. Company size: 51-200.
Reported benefit: Combines mobile growth features including A/B tests.
Reported limitation: Remote Config changes require coding knowledge.
Platform labels: Verification label not visible in the retrieved account. Incentive disclosure: Invited by platform; nominal incentive.
Platform: Software Advice
Review locator: Alejandro R.; 2023-11
Date precision: month only; the day was not exposed
Direct experimentation account; not an independently replicated test
Account checked: 2026-11-12
Search extraction calls this updated review; original date was not exposed.
Firebase individual customer accounts (author/date locators in reviews)
Verified User · 2020-01-24
Role: Director in Marketing. Company size: 51-200.
Reported benefit: Tested push notifications and trial duration.
Reported limitation: Non-Google attribution and interface speed issues.
Platform labels: Vetted Review; Verified User. Incentive disclosure: Incentivized.
Platform: TrustRadius
Review locator: Verified User; 2020-01-24
Direct experimentation account; not an independently replicated test
Account checked: 2026-11-12
Firebase individual customer accounts (author/date locators in reviews)
Reviewer reports describe their experience at the stated date. Platform validation labels do not independently establish every claim. Historical complaints are not proof of a current defect.
All sources and checked dates
- Firebase pricing · Official documentation · checked 2026-11-12
- Create Firebase Remote Config experiments · Official documentation · checked 2026-11-12
- Firebase individual customer accounts (author/date locators in reviews) · Customer-review source · checked 2026-11-12
- Firebase individual customer accounts (author/date locators in reviews) · Customer-review source · checked 2026-11-12
- Firebase individual customer accounts (author/date locators in reviews) · Customer-review source · checked 2026-11-12
GrowthBook
Sources checked 2026-11-12GrowthBook Cloud experimentation; self-hosted edition distinguished separately
- Recommended when
- Engineering/data team owning its warehouse integration. Conditional on the required implementation and qualifying plan being confirmed.
- Main compromise
- Visual editor is paid; data-service and operating costs remain
- Consider an alternative when
- Compare Statsig for a hosted product workflow or Optibase for a simpler marketer-owned website setup.
- What remains uncertain
- No hands-on deployment or self-hosted operating-cost benchmark. Raw experiment-data export entitlement not verified. This judgment assumes the named owner, implementation and qualifying plan. It does not establish actual setup time or measured product performance.
Plan, limits, and ownership cost
Starter $0; Pro $40/seat/month
Free plan includes this product’s core workflow
- Qualifying plan: Starter for SDK experiments; Pro for visual editor and split URL tests
- Billing unit: Cloud seats; managed warehouse/event-forwarder events
- Starter: 3 users, 1 project, unlimited flags/experiments/traffic; managed warehouse 1M events/month.
- Pro: up to 30 users, 3 projects; managed warehouse 2M events/month.
- Commitment: Published per-seat monthly rate; exact payment term not independently verified.
- Overages: Pro managed warehouse/event forwarding: $30 per additional million events.
- Self-hosted open source is free software; infrastructure and warehouse costs remain.
- Unlimited traffic is not unlimited managed data ingestion.
Official plan evidence:GrowthBook pricing
Documented capabilities and plan qualifications
- Visual editor: plan dependent
- Cloud Pro/Enterprise; self-hosted Enterprise.GrowthBook pricing
- Server-side experimentation: supported
- Server SDKs run flags and experiments.GrowthBook SDK overview
- Native mobile experiments: supported
- SDK overview explicitly includes mobile experimentation.GrowthBook SDK overview
- Export / retained history: Not verified
- Not independently verified in this public-source snapshot.
- Experiment repository: Not verified
- Not established by the sources reviewed. Confirm this requirement before choosing.
- Governance: plan dependent
- Enterprise adds enforced approvals, SSO/SCIM and exportable audit logs.GrowthBook pricing
Measurement evidence and unresolved requirements
Documented features do not establish that your implementation or statistical design is valid. Confirm every critical requirement before selecting a tool.
- Assignment and identity: supported
- SDK assignment is based on supplied attributes and is consistent across SDKs; choose and validate the intended identifier.GrowthBook SDK overview
- Exposure tracking: supported
- Analysis requires a tracking callback supplied by the implementation owner; delivery alone does not establish tracked exposure.GrowthBook SDK overview
- Statistical assumptions and stopping: Not verified
- Statistical assumptions and permitted stopping rules were not verified in this snapshot; request the method documentation before launch.
- Guardrails and secondary metrics: Not verified
- Automated guardrail enforcement and plan entitlement were not verified; secondary metrics alone do not establish enforcement.
Customer-reported experiences
5 attributed accounts in this sample. 5 accessible individual accounts across G2. Convenience sample, not representative sentiment or independently replicated product tests. Two-platform sampling target not met. 0 native AWS reviews; 26 external G2 reviews. Same author/date bodies as G2; not a second independent source. Five retained from one independent platform. No second independent collection established within bounded research.
Arthur H. · 2026-04-14
Role: Associate. Company size: 51-1000.
Reported benefit: Connected experiments and release controls.
Reported limitation: Technical onboarding and data setup.
Platform labels: Validated Reviewer. Incentive disclosure: Incentive status not visible; this does not establish no incentive.
Platform: G2
Review locator: Arthur H.; 2026-04-14
Collection source: Organic
Direct experimentation account; not an independently replicated test
Account checked: 2026-11-12
GrowthBook individual customer accounts (author/date locators in reviews)
Hampton L. · 2026-03-12
Role not visible. Company size: 50 or fewer.
Reported benefit: Versatile experiment workflows.
Reported limitation: Novice interface lacks guidance.
Platform labels: Validated Reviewer. Incentive disclosure: Incentive status not visible; this does not establish no incentive.
Platform: G2
Review locator: Hampton L.; 2026-03-12
Collection source: Organic
Direct experimentation account; not an independently replicated test
Account checked: 2026-11-12
GrowthBook individual customer accounts (author/date locators in reviews)
Verified User in Marketing and Advertising · 2025-08-08
Role not visible. Company size: 50 or fewer.
Reported benefit: Analyzes externally collected experiment data.
Reported limitation: None reported.
Platform labels: Validated Reviewer. Incentive disclosure: Incentive status not visible; this does not establish no incentive.
Platform: G2
Review locator: Verified User in Marketing and Advertising; 2025-08-08
Collection source: Organic
Direct experimentation account; not an independently replicated test
Account checked: 2026-11-12
GrowthBook individual customer accounts (author/date locators in reviews)
Verified User in Events Services · 2025-04-30
Role not visible. Company size: 50 or fewer.
Reported benefit: Frontend/backend testing and responsive support.
Reported limitation: Wants more prescriptive starter guidance.
Platform labels: Validated Reviewer. Incentive disclosure: Incentive status not visible; this does not establish no incentive.
Platform: G2
Review locator: Verified User in Events Services; 2025-04-30
Collection source: Organic
Direct experimentation account; not an independently replicated test
Account checked: 2026-11-12
GrowthBook individual customer accounts (author/date locators in reviews)
Matt J. · 2024-08-12
Role: Head of Product. Company size: 50 or fewer.
Reported benefit: Reliable splitting and warehouse export.
Reported limitation: Integration and script ordering affected early tests.
Platform labels: Validated Reviewer. Incentive disclosure: Incentive status not visible; this does not establish no incentive.
Platform: G2
Review locator: Matt J.; 2024-08-12
Collection source: Organic
Direct experimentation account; not an independently replicated test
Account checked: 2026-11-12
GrowthBook individual customer accounts (author/date locators in reviews)
Reviewer reports describe their experience at the stated date. Platform validation labels do not independently establish every claim. Historical complaints are not proof of a current defect.
All sources and checked dates
- GrowthBook pricing · Official documentation · checked 2026-11-12
- GrowthBook SDK overview · Official documentation · checked 2026-11-12
- GrowthBook individual customer accounts (author/date locators in reviews) · Customer-review source · checked 2026-11-12
Optibase
Sources checked 2026-11-12Optibase website experimentation
- Recommended when
- Marketer testing an existing compatible website. Conditional on the required implementation and qualifying plan being confirmed.
- Main compromise
- Confirm conversion-event setup, free active-test allowance and cap behavior
- Consider an alternative when
- Compare Unbounce or Instapage if you also need a hosted landing-page builder.
- What remains uncertain
- No hands-on experiment. Free plan card excludes separate analytics/heatmap/recording features; do not imply the entire suite is free. Native app, server-side and raw export capabilities not verified. This judgment assumes the named owner, implementation and qualifying plan. It does not establish actual setup time or measured product performance.
Plan, limits, and ownership cost
Free 10K tested users/month; Basic $79/month or $790/year
Free plan includes this product’s core workflow
- Qualifying plan: Free for initial website experiments; Basic for higher quota
- Billing unit: Monthly tested users
- Free: 10K tested users/month.
- Basic: 20K; Business $159/month: 50K; Professional $319/month: 120K.
- Commitment: Basic annual option totals $790, displayed as $66/month equivalent.
- Overages: Not independently verified.
- Tested-user allowance resets monthly; workspace subscriptions are separate.
- Official docs state unlimited team members.
- Exact free concurrent-test count not confirmed in current pricing table; do not borrow an older limit.
Official plan evidence:Optibase pricingOptibase workspaces and teams
Documented capabilities and plan qualifications
- Visual editor: supported
- Vendor markets no-code website experimentation; specific CMS integration still needs trial validation.Optibase website optimization platform
- Server-side experimentation: Not verified
- Not independently verified in this public-source snapshot.
- Native mobile experiments: Not verified
- Not independently verified in this public-source snapshot.
- Export / retained history: Not verified
- Not independently verified in this public-source snapshot.
- Experiment repository: Not verified
- Not established by the sources reviewed. Confirm this requirement before choosing.
- Governance: Not verified
- Workspace isolation and unlimited team collaboration documented; enterprise approval/audit controls not independently verified.Optibase workspaces and teams
Measurement evidence and unresolved requirements
Documented features do not establish that your implementation or statistical design is valid. Confirm every critical requirement before selecting a tool.
- Assignment and identity: Not verified
- Not verified for the intended identity unit, persistence and cross-device behavior.
- Exposure tracking: Not verified
- Not verified for actual exposure timing, deduplication and identity transitions.
- Statistical assumptions and stopping: Not verified
- Statistical assumptions and permitted stopping rules were not verified in this snapshot; request the method documentation before launch.
- Guardrails and secondary metrics: Not verified
- Automated guardrail enforcement and plan entitlement were not verified; secondary metrics alone do not establish enforcement.
Customer-reported experiences
5 attributed accounts in this sample. 5 accessible individual accounts across G2. Convenience sample, not representative sentiment or independently replicated product tests. Two-platform sampling target not met. 0 product reviews; category-level AI prose not user evidence. Oded H., July 29, 2025, discusses video encoding/streaming, not experimentation. Excluded despite badge. Five retained from one platform, all 2025; current feature and plan claims must be checked separately.
Alexandre T. · 2025-08-06
Role: CEO. Company size: 50 or fewer.
Reported benefit: Native Webflow experiments.
Reported limitation: Requested advanced targeting and multivariate tests.
Platform labels: Validated Reviewer. Incentive disclosure: Incentive status not visible; this does not establish no incentive.
Platform: G2
Review locator: Alexandre T.; 2025-08-06
Collection source: Organic
Direct experimentation account; not an independently replicated test
Account checked: 2026-11-12
Optibase individual customer accounts (author/date locators in reviews)
Corey H. · 2025-07-10
Role: Co-Founder. Company size: 50 or fewer.
Reported benefit: Custom trial-conversion events.
Reported limitation: Some confusing Webflow interface details.
Platform labels: Validated Reviewer. Incentive disclosure: Incentive status not visible; this does not establish no incentive.
Platform: G2
Review locator: Corey H.; 2025-07-10
Collection source: Organic
Direct experimentation account; not an independently replicated test
Account checked: 2026-11-12
Optibase individual customer accounts (author/date locators in reviews)
Danae M. · 2025-09-09
Role: Growth Marketing Manager. Company size: 50 or fewer.
Reported benefit: Simple Webflow testing.
Reported limitation: Conversion-event linking and deleted-event clutter.
Platform labels: Validated Reviewer. Incentive disclosure: Incentive status not visible; this does not establish no incentive.
Platform: G2
Review locator: Danae M.; 2025-09-09
Collection source: Organic
Direct experimentation account; not an independently replicated test
Account checked: 2026-11-12
Optibase individual customer accounts (author/date locators in reviews)
Tomasz S. · 2025-08-07
Role: Webflow Developer. Company size: 50 or fewer.
Reported benefit: Simple setup and responsive support.
Reported limitation: Unclear alerts when usage limits pause tests.
Platform labels: Validated Reviewer. Incentive disclosure: Incentive status not visible; this does not establish no incentive.
Platform: G2
Review locator: Tomasz S.; 2025-08-07
Collection source: Organic
Direct experimentation account; not an independently replicated test
Account checked: 2026-11-12
Optibase individual customer accounts (author/date locators in reviews)
Madeline C. · 2025-07-16
Role: Head of Digital Marketing. Company size: 50 or fewer.
Reported benefit: Independent marketer experiment setup.
Reported limitation: None reported.
Platform labels: Validated Reviewer. Incentive disclosure: Incentive status not visible; this does not establish no incentive.
Platform: G2
Review locator: Madeline C.; 2025-07-16
Collection source: Organic
Direct experimentation account; not an independently replicated test
Account checked: 2026-11-12
Optibase individual customer accounts (author/date locators in reviews)
Reviewer reports describe their experience at the stated date. Platform validation labels do not independently establish every claim. Historical complaints are not proof of a current defect.
All sources and checked dates
- Optibase pricing · Official documentation · checked 2026-11-12
- Optibase workspaces and teams · Official documentation · checked 2026-11-12
- Optibase website optimization platform · Official documentation · checked 2026-11-12
- Optibase individual customer accounts (author/date locators in reviews) · Customer-review source · checked 2026-11-12
PostHog
Sources checked 2026-11-12PostHog Experiments bundled with Feature Flags
- Recommended when
- Product team already collecting dependable PostHog events. Conditional on the required implementation and qualifying plan being confirmed.
- Main compromise
- Requests and analytics events have separate meters; visual editor is Beta
- Consider an alternative when
- Compare Statsig for a dedicated experimentation workflow or GrowthBook for warehouse-centered analysis.
- What remains uncertain
- No hands-on visual-editor beta test. Paid retention descriptions differ across pricing pages; do not publish a definitive retention claim from this snapshot. Data export entitlement not independently verified. This judgment assumes the named owner, implementation and qualifying plan. It does not establish actual setup time or measured product performance.
Plan, limits, and ownership cost
1M flag requests/month free; paid rates start at $0.000100/request
Free plan includes this product’s core workflow
- Qualifying plan: Free or pay-as-you-go
- Billing unit: Feature-flag requests; analytics events billed separately
- Free: 1M flag requests/month, 1M analytics events/month, 1 project, unlimited team members.
- Commitment: No required annual commitment shown.
- Overages: Tiered flag-request rates; separate analytics or other product usage may add cost.
- On the free plan, additional events above the allowance are dropped and flags return a quota-limited default. Pay-as-you-go bills excess usage.
- Billing allowances are organization-wide, not per project.
Official plan evidence:PostHog pricingPostHog Experiments pricing
Documented capabilities and plan qualifications
- Visual editor: supported
- Public experiment feature matrix labels visual editor/no-code experiments Beta.PostHog Experiments capabilities
- Server-side experimentation: supported
- Product lists backend SDK/framework support, including Python and server frameworks.PostHog Experiments capabilities
- Native mobile experiments: supported
- Experiment page lists Android, iOS, React Native and Flutter.PostHog Experiments capabilities
- Export / retained history: Not verified
- Not independently verified in this public-source snapshot.
- Experiment repository: Not verified
- Not established by the sources reviewed. Confirm this requirement before choosing.
- Governance: plan dependent
- Platform packages provide SSO, audit logs, custom roles and project permissions.PostHog pricing
Measurement evidence and unresolved requirements
Documented features do not establish that your implementation or statistical design is valid. Confirm every critical requirement before selecting a tool.
- Assignment and identity: Not verified
- Not verified for the intended identity unit, persistence and cross-device behavior.
- Exposure tracking: Not verified
- Not verified for actual exposure timing, deduplication and identity transitions.
- Statistical assumptions and stopping: Not verified
- The product page names Bayesian and frequentist engines and primary/secondary metrics. Model assumptions and permitted stopping rules were not verified.PostHog Experiments capabilities
- Guardrails and secondary metrics: Not verified
- Automated guardrail enforcement and plan entitlement were not verified; secondary metrics alone do not establish enforcement.
Customer-reported experiences
5 attributed accounts in this sample. 5 accessible individual accounts across G2, Trustpilot. Convenience sample, not representative sentiment or independently replicated product tests. Two-platform sampling target met. Oskar Vanhove body accessible on product review listing. Restricted individual link not bypassed.
Phil J. · 2026-07-26
Role: Product and Growth Lead. Company size: 51-1000.
Reported benefit: Connects experiment funnels with session evidence.
Reported limitation: Easy collection can postpone event governance.
Platform labels: Validated Reviewer. Incentive disclosure: Incentivized.
Platform: G2
Review locator: Phil J.; 2026-07-26
Collection source: G2 invite
Direct experimentation account; not an independently replicated test
Account checked: 2026-11-12
PostHog individual customer accounts (author/date locators in reviews)
Amirhossein A. · 2026-06-02
Role: Co-Founder. Company size: 50 or fewer.
Reported benefit: Experiments and analytics share context.
Reported limitation: Onboarding and nontechnical reporting require effort.
Platform labels: Verification label not visible in the retrieved account. Incentive disclosure: Incentive status not visible; this does not establish no incentive.
Platform: G2
Review locator: Amirhossein A.; 2026-06-02
Direct experimentation account; not an independently replicated test
Account checked: 2026-11-12
PostHog individual customer accounts (author/date locators in reviews)
Documentation A. · 2026-10-16
Role: CEO. Company size: 50 or fewer.
Reported benefit: Useful identity joining and event capture.
Reported limitation: CTA differentiation needs custom properties.
Platform labels: Validated Reviewer. Incentive disclosure: Incentive status not visible; this does not establish no incentive.
Platform: G2
Review locator: Documentation A.; 2026-10-16
Collection source: Organic
Adjacent product or workflow experience; not direct validation of this experimentation use case
Account checked: 2026-11-12
PostHog individual customer accounts (author/date locators in reviews)
Verified User in Internet · 2026-11-02
Role: Business Systems & Digital Operations Specialist. Company size: 51-1000.
Reported benefit: Combines analytics and controlled rollouts.
Reported limitation: Unreliable CSV imports and tricky alerts.
Platform labels: Validated Reviewer. Incentive disclosure: Incentivized.
Platform: G2
Review locator: Verified User in Internet; 2026-11-02
Collection source: G2 invite
Adjacent product or workflow experience; not direct validation of this experimentation use case
Account checked: 2026-11-12
PostHog individual customer accounts (author/date locators in reviews)
Oskar Vanhove · 2026-09-29
Role not visible. Company size not visible.
Reported benefit: Useful test insights and generous allowance.
Reported limitation: None reported.
Platform labels: Verification label not visible in the retrieved account. Incentive disclosure: Unprompted review.
Platform: Trustpilot
Review locator: Oskar Vanhove; 2026-09-29
Direct experimentation account; not an independently replicated test
Account checked: 2026-11-12
PostHog individual customer accounts (author/date locators in reviews)
Reviewer reports describe their experience at the stated date. Platform validation labels do not independently establish every claim. Historical complaints are not proof of a current defect.
All sources and checked dates
- PostHog pricing · Official documentation · checked 2026-11-12
- PostHog Experiments pricing · Official documentation · checked 2026-11-12
- PostHog Experiments capabilities · Official documentation · checked 2026-11-12
- PostHog individual customer accounts (author/date locators in reviews) · Customer-review source · checked 2026-11-12
- PostHog individual customer accounts (author/date locators in reviews) · Customer-review source · checked 2026-11-12
Statsig
Sources checked 2026-11-12Statsig Cloud Developer/Pro experimentation; Warehouse Native is an Enterprise deployment
- Recommended when
- Engineering-supported product team wanting hosted analysis. Conditional on the required implementation and qualifying plan being confirmed.
- Main compromise
- Metered events need planning; free metric calculations stop above quota
- Consider an alternative when
- Compare GrowthBook when warehouse ownership matters most, or PostHog when analytics and replay are already central.
- What remains uncertain
- No hands-on implementation. Export entitlement not independently verified. Metered events cannot be equated directly with visitors. This judgment assumes the named owner, implementation and qualifying plan. It does not establish actual setup time or measured product performance.
Plan, limits, and ownership cost
Developer $0; Pro $150/project/month including 5M events
Free plan includes this product’s core workflow
- Qualifying plan: Developer for core experiments and visual editor; Pro for holdouts/bandits
- Billing unit: Metered events, including experiment exposures and logged events; paid subscriptions are per project
- Developer: 2M events/month, unlimited seats and flag/config checks.
- Pro: 5M events/month.
- Each Pro subscription covers one project; additional projects need separate upgrades.
- Commitment: Pro baseline billed at start of each monthly billing period.
- Overages: Pro: $0.05 per additional 1,000 metered events.
- Exceeding Developer quota stops Metric Lift computation while targeting continues.
- Extra logged-event dimensions can add metered events.
Official plan evidence:Statsig pricing
Documented capabilities and plan qualifications
- Visual editor: supported
- Official HTML has inclusion checks for no-code visual editor on Developer, Pro and Enterprise.Statsig pricing
- Server-side experimentation: supported
- Server SDKs run API, algorithm and infrastructure experiments.Statsig server SDKs
- Native mobile experiments: supported
- Client SDK docs explicitly support mobile experiments.Statsig client SDKs
- Export / retained history: Not verified
- Not independently verified in this public-source snapshot.
- Experiment repository: Not verified
- Not established by the sources reviewed. Confirm this requirement before choosing.
- Governance: plan dependent
- Pro adds change reviews/approvals; Enterprise adds SSO, RBAC and teams.Statsig pricing
Measurement evidence and unresolved requirements
Documented features do not establish that your implementation or statistical design is valid. Confirm every critical requirement before selecting a tool.
- Assignment and identity: supported
- Client SDK documentation describes userID and stableID; the intended account/user assignment unit still needs configuration and validation.Statsig client SDKs
- Exposure tracking: supported
- Experiment/gate checks log exposure; Diagnostics Exposure Stream helps inspect events. A check must correspond to the intended exposure.Statsig client SDKs
- Statistical assumptions and stopping: Not verified
- Statistical assumptions and permitted stopping rules were not verified in this snapshot; request the method documentation before launch.
- Guardrails and secondary metrics: Not verified
- Automated guardrail enforcement and plan entitlement were not verified; secondary metrics alone do not establish enforcement.
Customer-reported experiences
5 attributed accounts in this sample. 5 accessible individual accounts across Capterra, G2. Convenience sample, not representative sentiment or independently replicated product tests. Two-platform sampling target met. Laure and Dave bodies accessible. Opened markdown omits roles, company size, individual verification/incentive metadata; those fields retained as null.
Nirav M. · 2026-09-11
Role: Senior Software Engineer. Company size: More than 1000.
Reported benefit: Backend bucketing and QA overrides.
Reported limitation: Assignment tracing and stale overrides.
Platform labels: Validated Reviewer. Incentive disclosure: Incentivized.
Platform: G2
Review locator: Nirav M.; 2026-09-11
Collection source: Seller invite
Direct experimentation account; not an independently replicated test
Account checked: 2026-11-12
Statsig individual customer accounts (author/date locators in reviews)
Leif F. · 2023-12-15
Role not visible. Company size: 50 or fewer.
Reported benefit: Dependable daily experimentation.
Reported limitation: Advanced value takes experience.
Platform labels: Validated Reviewer. Incentive disclosure: Incentivized.
Platform: G2
Review locator: Leif F.; 2023-12-15; updated 2026-07-21
Updated: 2026-07-21; original review date retained above
Collection source: Seller invite
Direct experimentation account; not an independently replicated test
Account checked: 2026-11-12
Statsig individual customer accounts (author/date locators in reviews)
Matteo H. · 2023-05-17
Role not visible. Company size: 50 or fewer.
Reported benefit: API enables experiment workflow.
Reported limitation: Wants first-party agents and read-only access.
Platform labels: Validated Reviewer. Incentive disclosure: Incentivized.
Platform: G2
Review locator: Matteo H.; 2023-05-17; updated 2026-07-24
Updated: 2026-07-24; original review date retained above
Collection source: Seller invite
Direct experimentation account; not an independently replicated test
Account checked: 2026-11-12
Statsig individual customer accounts (author/date locators in reviews)
Laure · 2025-06-21
Role not visible. Company size not visible.
Reported benefit: Faster experiment instrumentation and analysis.
Reported limitation: Disconnected analytics user experience.
Platform labels: Verification label not visible in the retrieved account. Incentive disclosure: Incentive status not visible; this does not establish no incentive.
Platform: Capterra
Review locator: Laure; 2025-06-21
Direct experimentation account; not an independently replicated test
Account checked: 2026-11-12
Statsig individual customer accounts (author/date locators in reviews)
Dave · 2025-06-30
Role not visible. Company size not visible.
Reported benefit: Cloning and analytics broaden experimentation.
Reported limitation: Engineering-oriented documentation complicates onboarding.
Platform labels: Verification label not visible in the retrieved account. Incentive disclosure: Incentive status not visible; this does not establish no incentive.
Platform: Capterra
Review locator: Dave; 2025-06-30
Direct experimentation account; not an independently replicated test
Account checked: 2026-11-12
Statsig individual customer accounts (author/date locators in reviews)
Reviewer reports describe their experience at the stated date. Platform validation labels do not independently establish every claim. Historical complaints are not proof of a current defect.
All sources and checked dates
- Statsig pricing · Official documentation · checked 2026-11-12
- Statsig client SDKs · Official documentation · checked 2026-11-12
- Statsig server SDKs · Official documentation · checked 2026-11-12
- Statsig individual customer accounts (author/date locators in reviews) · Customer-review source · checked 2026-11-12
- Statsig individual customer accounts (author/date locators in reviews) · Customer-review source · checked 2026-11-12
Questions buyers ask
Are there free A/B testing tools for small businesses?
Yes, but compare the actual experimentation features, quotas, technical work, and behavior when a limit is exceeded. A free analytics product or temporary trial is not equivalent to ongoing free experimentation.
Can I test a low-traffic website with a free tool?
The software can allocate traffic, but whether the result is useful depends on baseline conversion, eligible sample, detectable effect, and runtime. Check feasibility before choosing the tool.
Keep the decision after the test ends
Choose the execution tool, run the experiment, then preserve its hypothesis, source data, evidence limits, and decision. GrowthLayer helps turn supported historical inputs into structured records that your team can review and consult before planning another test.
Start with one completed experiment. Confirm the input path and review the imported record; no automatic connection to every vendor is implied.
Import your first test