The A/B testing platform that runs the program for you

CSS, JavaScript, and redirect variants. Bayesian statistics. AI that catches problems before they cost you a quarter — and explains your wins after. Runs on any website.

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Draft Live Primary metric Revenue / session

Lift over Control

vs $3.20 control

Variant B beats Control with probability

sessions 95% CI · +% → +%

AI summary

Traffic allocation

Control

Variant A

Variant B

The complete stack

Everything the enterprise tools have. None of the enterprise pricing.

Variant types, statistical rigor, AI tooling, multiplatform support — Split Test Pro ships the full experimentation stack so smaller teams can compete with the biggest brands.

Variants

CSS, JavaScript & redirect variants

Test anything from a button color to a complete page replacement. Style changes with CSS, content and DOM rewrites with JavaScript, or A/B two entirely different URLs with redirect variants.

AI-powered anomaly detection

Split Test Pro watches every running experiment for sample-ratio mismatches, traffic drops, novelty effects, and trend divergence — surfacing problems before they cost you a quarter.

AI pre-launch QA

Before you go live, our AI reviews your hypothesis, targeting rules, and metrics — flagging setup issues and estimating time-to-significance so you don't waste traffic on broken tests.

Stats

Bayesian statistics

Beta-Binomial models for conversion tests, Normal distributions for revenue and engagement. Get probability-to-be-best and credible intervals — not p-values you have to interpret.

Stats

Continuous metrics

Move beyond binary conversions. Track revenue per session, AOV, and engagement value — Split Test Pro models them with full distributions, not just averages.

AI results review

When an experiment ends, get a Claude-powered analysis with key findings, a clear recommendation (ship, iterate, or revert), and a projected revenue impact.

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The path to better results

From hypothesis to winner in three steps

A better experimentation process that saves time, protects traffic, and turns insights into impact.

CSS JS

Variant A · style.css Variant B · script.js

.btn-primary {  background: #ff6b6b;  color: #fff;}on('click', '.btn', () => {  track('cta-click');  redirect('/checkout');});

Build a variant

Write CSS, JavaScript, or set a redirect. Preview the rendered variant via auto-captured screenshots before you launch.

Launch with confidence

Our AI reviews your setup, flags issues, and estimates time-to-significance. Then we split traffic and stream events into the dashboard.

Ship the winner

Probability-to-be-best updates in real time. When the call is clear, our AI summarises the result and projects your revenue impact.

Loved by teams

What our customers say

Real teams shipping real lifts — from quick CSS tweaks to full-flow JS variants.

"We were paying five figures a year for our old testing tool. Split Test Pro gave us better stats — actual probability-to-be-best instead of p-value gymnastics — and the AI catches setup mistakes my team used to ship without noticing."

John Harper

Digital Strategist

"The AI results review is the killer feature for me. Every test ends with a clear recommendation and a revenue projection I can actually take to my CEO. We've stopped having 'is this significant yet?' meetings."

Samantha Lee

Marketing Director

"We run experiments across our Shopify store and our standalone landing pages from the same dashboard. JS variants let us test real product changes, not just colors. It feels like having a research team in a tab."

Carlos Mendoza

Lead Product Designer

Simple pricing

Pricing that scales with your traffic

Every plan ships the same complete feature set. Pick the tier that fits your monthly experiment traffic.

Starter

$20 /month

For new stores running their first experiments.

Includes up to

10,000 monthly sessions