Outtest vs Amplitude Experiment
Amplitude Experiment is built for teams that already measure their product in Amplitude. Feature Experimentation runs code-based tests on the client or server, Web Experimentation adds a visual editor for site changes, and both read results from Amplitude events with sequential testing by default. Its Website Conversion Agent can propose strategies and create web variants, though you launch them yourself.
Outtest runs the whole loop with AI agents. They read your analytics and payment data, find where you lose the most money, build the new version, run the test and call the winner on revenue per visitor from your payment tool, including pricing, trial, cancel flow, Meta ad and SEO tests. It costs from $29 a month for 3 tests and can read Amplitude as one of its analytics sources. Outtest is new. Amplitude is a public company founded in 2012.
At a glance
| Outtest | Amplitude Experiment | |
|---|---|---|
| Best for | Founders and small teams who want tests run for them and judged on real revenue, without a CRO specialist. | Product and growth teams already on Amplitude analytics who want experiments that use the same events, cohorts and metrics. |
| Price | From $29/month (3 tests a month). 20% off yearly. | Every Amplitude plan includes experimentation. Free covers 2M events a month with 1 active feature experiment and 1 active web experiment. Plus starts at $0 and scales with event volume. Growth and Enterprise are custom, with 2 active experiments of each type and add-ons for more. |
| Free plan or trial | No free plan or trial | Free plan |
| AI builds the test versions | Yes | Yes |
| 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 (sequential testing by default, with T-test, Bayesian and Thompson sampling options, plus CUPED) |
| Payment integrations | Stripe, Shopify, Polar, Whop, Paddle, Lemon Squeezy, Gumroad, Dodo Payments, Creem, RevenueCat, Chargebee | Stripe, Shopify, RevenueCat, Adapty, Apphud, Nami |
Pick Amplitude Experiment if
- Your team already uses Amplitude analytics and wants experiments on the same events and cohorts.
- You need code-based product experiments and visual web experiments from one vendor.
- You want sequential testing, CUPED, bandits and holdouts, and can pay for Growth or Enterprise add-ons.
- You qualify for the startup scholarship and a free year of Growth.
- You test inside a mobile or web app where analytics depth matters more than speed of setup.
Pick Outtest if
- You want more than one or two tests live at a time without negotiating an add-on.
- You want revenue per visitor from Stripe, Paddle, Shopify or another payment tool as the default metric, without adding user IDs to Stripe metadata.
- You want agents that launch and call tests on autopilot, with checkout, pricing and cancel flow changes held for your approval.
- You want to test pricing, trial length, cancel flows, Meta ads and SEO page groups, not only on-page edits.
The verdict
Amplitude Experiment is a good choice if Amplitude is already your analytics system and you want experiments on the same data, especially with the startup scholarship or a Growth contract that lifts the experiment caps. Outtest fits better if you want many revenue-judged tests on marketing and pricing surfaces run for you at a flat price per test. The two can work together, since Outtest can read your Amplitude data.
Questions people ask
Is Amplitude Experiment free?+
Yes, with limits. The Free plan includes 2M events a month, unlimited feature flags, and 1 active feature experiment plus 1 active web experiment, with no card and no time limit.
How many experiments can I run on Amplitude?+
Free and Plus allow 1 active feature experiment and 1 active web experiment. Growth and Enterprise allow 2 of each, and an add-on lifts the limit.
What statistics does Amplitude Experiment use?+
Sequential testing is the default, with a 95% confidence level and Bonferroni correction. You can switch to a T-test, Bayesian analysis or Thompson sampling, and turn on CUPED.
Does Amplitude Experiment have a visual editor?+
Yes. Web Experimentation has a point-and-click editor for text, images and styles, plus full-page tests across matching URLs. The custom code editor needs Growth or Enterprise.
What happened between Amplitude and Statsig?+
On May 5, 2026 Amplitude announced a strategic partnership under which it took on Statsig's brand, customers and platform, and said it will keep developing Statsig while building a more integrated roadmap. Statsig's original team stayed at OpenAI, which had agreed to acquire Statsig in September 2025.
Sources
Checked on 28 September 2026 from Amplitude Experiment's own pages. Prices and features change; check Amplitude Experiment's site before you buy.
- amplitude.com/pricing
- amplitude.com/amplitude-experiment
- amplitude.com/docs/web-experiment
- amplitude.com/docs/feature-experiment/workflow/finalize-statistical-preferences
- amplitude.com/docs/feature-experiment/workflow/define-goals
- amplitude.com/docs/data/source-catalog/stripe
- amplitude.com/integrations
- amplitude.com/docs/amplitude-ai/website-conversion-agent
- amplitude.com/company
- amplitude.com/blog/amplitude-and-statsig-partnership
- statsig.com/blog/openai-acquisition
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.