Client-side experimentation

A/B testing for teams
that write code.

LiftCRO runs A/B, split-URL and multivariate tests from a 7 kB snippet. Write variations in JavaScript and CSS, target real audiences, and decide with statistics you can explain.

Get started Read the docs

LiftCRO project overview with running experiments

One platform, no visual editor

Everything a CRO program needs to ship tests every week

Drag-and-drop editors break on modern sites and create un-reviewable changes. LiftCRO keeps variations in code, so they're precise, reviewable and work on any framework.

A/B/n testsSplit URL testsMultivariate testsCode editorAudiencesGoal metricsGuardrailsRevenue metricsBayesianFrequentistHolm–BonferroniSRM checksQA preview linksSPA routingConsent modeWinner rolloutsSchedulingAudit history

Build

Variations are code, not clicks

Write each variation in JavaScript and CSS in the editor engineers already know, with autocomplete for waitFor() and lcro.track(). Multivariate tests compose factor code automatically; split-URL tests redirect before first paint.

Decide

Results you can defend in a review

Goal, secondary and guardrail metrics with delta-method intervals, chance-to-win or p-values, multiple-comparison correction, SRM detection and breakdowns by device, browser and traffic source.

~7 kB

gzipped snippet, config inlined

1 request

edge-cached, 60 s propagation

test types: A/B/n, split URL, MVT

targeting attributes

Install

One script tag. Live in minutes.

Paste it into your <head>. Works with plain HTML, Shopify, WordPress, Webflow, Next.js, React and Vue. Track conversions with page visits, clicks, or one line of JavaScript.

index.html

<script src="https://cdn.liftcro.io/sdk/lc_yourkey.js"></script>

checkout.js

window.liftcro = window.liftcro || [];
liftcro.push(["track", "purchase", order.total]);

Run your first experiment today.

Every feature on every plan, from $41/month. Cancel anytime. See pricing