Statsig review (2026), pros, cons and pricing
- What it is
- Statsig is a feature flag and experimentation platform with built-in product analytics and session replay, owned by Amplitude since May 2026.
- Best for
- Engineering-led product teams that want feature flags, experiments and analytics in one tool, with a warehouse-native option on Enterprise.
- Price
- From $150/month
- Free plan or trial
- Free plan
- Founded
- 2021
- Headquarters
- Bellevue, Washington
- Founder
- Vijaye Raji, a former Facebook engineering leader
- OpenAI acquisition
- Announced September 2, 2025, for $1.1B in stock. Raji became OpenAI's CTO of Applications.
- Current owner
- Amplitude, since May 5, 2026. Amplitude took on the brand, customers and platform. The original team stayed at OpenAI.
- Customers named on its site
- OpenAI, Microsoft, Atlassian, Notion, Brex, Riot Games
What Statsig is
Statsig bundles feature flags, experiments, product analytics, session replay and web analytics in one platform. Vijaye Raji, a former Facebook engineering leader, founded it in 2021 in Bellevue, Washington. OpenAI agreed to buy it for $1.1B in stock in September 2025 and made Raji its CTO of Applications. On May 5, 2026 Amplitude took on Statsig's brand, customers and platform, and said it will keep maintaining and developing Statsig across cloud and warehouse deployments. The original team stayed at OpenAI.
How experiments work
You install an SDK, wrap the change in a feature gate or experiment, and log the events you care about. Statsig records an exposure when your code checks a user against an experiment, then compares metrics between the groups. Server SDKs cover Node.js, Java, Python, Go, Ruby, C#, PHP, C++ and Rust, so you can test APIs, algorithms and infrastructure as well as UI.
The default analysis is frequentist with sequential testing, so p-values and confidence intervals stay valid if you check early. You can switch to SPRT, which allows unlimited peeking and can accept the null, or to a Bayesian mode that reports chance to beat control and expected loss. Pro adds CUPED, holdouts and multi-armed bandits.
For marketing sites there's a visual editor, which Statsig also calls Sidecar. It's a point-and-click tool for changing styles, text and calls to action, injecting scripts and setting up redirects on a live page, measured with the same stats engine.
Revenue and data
Statsig has no native Stripe connector. Revenue reaches it in three ways. You log purchase events from your own code, you import metrics from a data warehouse, or you use the RevenueCat integration, which sends billing and subscription events by webhook with no extra logging. For RevenueCat you have to set its appUserID to match your Statsig user ID. The Shopify guide has you write a custom pixel that forwards checkout_completed events with the order total. Warehouse Native, where Statsig analyzes data inside your own warehouse, is Enterprise only.
AI features
In January 2026 Statsig described a hypothesis advisor, AI summaries of results with a ship recommendation, natural language search across past experiments, and stale gate cleanup through GitHub pull requests. Its MCP server lets coding agents such as Claude Code, Codex or Cursor create gates and experiments. None of these write the variations. Your team still decides what to test and builds it.
Who it suits
Statsig fits product and engineering teams shipping changes inside an app who want flags and experiments in one place and the stats depth to trust the answer. It's a weaker fit for a small marketing team with no developer time, because anything beyond the visual editor needs code and event logging.
Before you commit
Ask how Amplitude plans to combine the Statsig and Amplitude Experiment roadmaps, and whether pricing will change at renewal. Check your volume against the 2M free and 5M Pro allowances, because exposures, logged events, imported metrics and custom metrics all count. And note that Pro covers one project per subscription.
Pros and cons
What Statsig does well
- Feature flags, experiments, product analytics and session replay come in one platform, on every plan including the free one.
- Flag and config checks are unlimited on every plan, so you only pay for metered events.
- The free Developer plan covers 2M events a month with unlimited seats.
- Deep stats options. Frequentist with sequential testing, SPRT, a Bayesian mode, and on Pro, CUPED, holdouts and multi-armed bandits.
- The visual editor lets marketers change text, styles and calls to action, or set up redirects, on a live site without a code deploy.
- Server SDKs for Node.js, Java, Python, Go, Ruby, C#, PHP, C++ and Rust cover backend and infrastructure tests.
Where it falls short
- Ownership changed twice in eight months. OpenAI bought Statsig in September 2025, then Amplitude took over the product and customers in May 2026 while the original team stayed at OpenAI.
- No native Stripe connector. Revenue has to arrive as logged events, warehouse imports or RevenueCat webhooks.
- Warehouse native analysis is Enterprise only, with custom pricing.
- Pro covers one project per subscription.
- Its AI features review hypotheses, summarize results and search past experiments. They don't write the variations.
Outtest vs Statsig
Statsig and Outtest both run split tests, but they start from different places. Statsig gives engineers feature flags, SDKs and a deep stats engine. Your team decides what to test, builds each version in code or in the visual editor, logs the events that matter, and reads the results.
Outtest hands that loop to AI agents. They read your analytics and payment data, find the page where you lose the most money, write the new version, run the test and call the winner on revenue per visitor from your payment tool. It's built for marketing surfaces like landing pages, pricing pages, trials and cancel flows, and it's priced by tests a month from $29. Outtest is new. Statsig names OpenAI, Microsoft and Notion among its customers.
| Outtest | Statsig | |
|---|---|---|
| Best for | Founders and small teams who want tests run for them and judged on real revenue, without a CRO specialist. | Engineering-led product teams that want feature flags, experiments and analytics in one tool, with a warehouse-native option on Enterprise. |
| Price | From $29/month (3 tests a month). 20% off yearly. | Free Developer plan up to 2M metered events a month. Pro is $150 a month with 5M events included, then $0.05 per 1,000 events. Enterprise, which includes warehouse native, is custom. |
| Free plan or trial | No free plan or trial | Free plan |
| AI builds the test versions | Yes | Partly |
| Judges tests on revenue from your payment tool | Yes | Partly |
| Visual editor | No | Yes |
| Server-side tests | Partly | Yes |
| Stats engine | Bayesian, on revenue per visitor | Both (frequentist with sequential testing by default, Bayesian mode optional) |
| Payment integrations | Stripe, Shopify, Paddle, Lemon Squeezy, Dodo Payments, Creem, RevenueCat, Chargebee | RevenueCat |
Pick Statsig if
- Your engineers want feature flags, gradual rollouts and kill switches alongside experiments.
- You run product experiments inside a logged-in app, on the server or in mobile apps.
- You want sequential testing, SPRT, a Bayesian mode and CUPED, and you have someone to read the results.
- Your metrics already live in a data warehouse and you can buy Enterprise for warehouse native analysis.
- You want product analytics and session replay in the same tool as your flags.
Pick Outtest if
- You want tests found, built, run and called for you, without engineers writing flag code.
- You want every test judged on revenue per visitor pulled from Stripe, Paddle, Shopify or another payment tool you already use.
- Your tests are on marketing surfaces such as landing pages, pricing pages, trial length or cancel flows.
- You'd rather pay a flat price per test ($29 a month for 3 tests) than per event.
The verdict. Pick Statsig if engineers own experimentation and you want flags, product experiments and analytics in one platform with serious stats. Pick Outtest if you want AI agents to run revenue-judged tests on your marketing and pricing pages without an engineering queue. Some teams will use both, Statsig inside the product and Outtest on the pages that sell it. Either way, watch Statsig's roadmap now that Amplitude owns it.
Questions people ask
Is Statsig owned by OpenAI or Amplitude?+
Amplitude, as of May 5, 2026. OpenAI announced it was acquiring Statsig for $1.1B in stock on September 2, 2025. Amplitude then took on Statsig's brand, customers and platform, and the original Statsig team stayed at OpenAI. Amplitude says it will keep maintaining and developing Statsig, including warehouse deployments.
How much does Statsig cost?+
The Developer plan is free up to 2M metered events a month. Pro is $150 a month with 5M events included, then $0.05 per 1,000 events. Enterprise, which includes warehouse native deployment, is custom. Flag and config checks are unlimited on every plan.
Does Statsig have a visual editor?+
Yes. Its visual editor, also called Sidecar, is a point-and-click tool for changing text, styles and calls to action, injecting scripts and setting up redirects on a live website. Statsig measures the results with the same stats engine it uses for coded experiments.
Can Statsig measure revenue from Stripe?+
Not through a native Stripe connector. You can log purchase events from your code, import metrics from a data warehouse, or use the RevenueCat integration, which sends subscription and revenue events by webhook. Outtest reads revenue from Stripe and other payment tools directly and judges every test on revenue per visitor.
Is Statsig Bayesian or frequentist?+
Both. Frequentist analysis with sequential testing is the default. You can switch to SPRT or to a Bayesian mode that reports chance to beat control and expected loss, and Pro adds CUPED variance reduction.
Sources
Checked on 28 September 2026 from Statsig's own pages. Prices and features change; check Statsig's site before you buy.
- statsig.com/pricing
- statsig.com/
- statsig.com/blog/openai-acquisition
- amplitude.com/blog/amplitude-and-statsig-partnership
- techcrunch.com/2025/09/02/openai-acquires-product-testing-startup-statsig-and-shakes-up-its-leadership-team/
- geekwire.com/2025/openai-acquires-statsig-for-1-1b-names-ceo-to-key-exec-role-in-surprise-exit-for-seattle-area-unicorn/
- docs.statsig.com/guides/sidecar-experiments/introduction
- docs.statsig.com/experiments-plus/bayesian/
- docs.statsig.com/server/introduction
- docs.statsig.com/integrations/introduction
- docs.statsig.com/integrations/data-connectors/revenuecat
- docs.statsig.com/guides/shopify-ab-test
- statsig.com/blog/statsig-ai-features
- docs.statsig.com/integrations/mcp
Let Outtest run your split tests
AI agents read your analytics and payments, find where you lose the most money, build the fix and test it. Every test is judged on revenue, not clicks. Plans from $29 a month.