See which version
actually wins
Otter runs A/B tests on your live site and tells you, in plain language, the moment one version truly beats the others. No engineers. No flicker. No enterprise contract. Add one line of code and launch your first test in minutes.
Works with the platforms teams already use
99.9%
Uptime
<50ms
SDK Load Time
80-99%
Configurable Thresholds
0
Flicker
Test. Analyze. Report.
From hypothesis to confident decisions — all in one place.
Visual A/B Testing
Test any element on your page. Unlimited variants, precise traffic splits, and a one-line install — no developer handoff.
Audience Targeting
Target by device, location, URL pattern, or custom attributes. Show the right test to the right visitors.
Decision-Ready Analysis
Know when results are real. Choose frequentist or Bayesian analysis with configurable decision thresholds.
Revenue & Goal Tracking
Measure purchases, AOV, and revenue per variant — or reuse your existing GA4 conversion events as goals.
Slack Alerts
Get pinged the moment a test crosses your decision threshold. Winners and revenue milestones, right in your channel.
Branded Reports
Share results with clients via branded, password-protected reports. Your logo, your colors, your domain.
How it works
Three steps to data-driven decisions.
Install the snippet
Copy and paste one line into your site. Works with any website, CMS, or framework — no build step required.
Create your test
Use the visual editor to set up variants, pick your goals, and choose how much traffic to allocate. No coding needed.
See what wins
Watch conversions roll in on a live dashboard. Otter tells you exactly when you have a statistically confident winner.
Loved by teams who love data
See what our customers say about optimizing with Otter.
Refreshingly simple!
Google Review
We switched from a big-name tool and saved hours every week. The setup was painless and the results dashboard is exactly what we needed.
Google Review
Finally an A/B testing tool that doesn't need a team of engineers to set up. We had our first test live in under 10 minutes.
Google Review
Unlimited visitors. Unlimited tests. No MTU caps, no overage charges. Flat-rate billing that doesn't punish you for growing.
Coming from VWO, Optimizely, or AB Tasty?
See side-by-side comparisons of pricing, features, and billing models — and why teams are moving to Otter.
Start optimizing today
Join thousands of teams making every decision data-driven.