Run rigorous experiments across pages, products, and pricing without writing code. Bayesian stats, segment-aware verdicts, and revenue lift — not just CVR. Our AI reads every result, flags the winner, and tells you why — in plain English.
A/B, A/A, multivariate, split-URL, and redirect tests share a single visual editor and stats engine.
See which audience is actually moving the needle. Per-segment significance and lift, not just topline.
Tie experiments to orders, AOV, refund rate, and LTV. Stop optimizing vanity metrics.
Most teams just want to know: "Did B win, and by how much?" We answer that in plain English. Power users can switch to frequentist with full p-values, effect size, and MDE planning.
Slice every experiment by 40+ pre-built segments — geo, device, traffic source, cart value, returning vs. new — or bring your own from Segment, RudderStack, or GA4.
CustomFit felt like swapping clunky boots for running shoes. More tests, bolder personalization, results in front of us.
The same Bayesian + frequentist engine powers every experiment — pick the method that fits the question.
Classic head-to-head on one or more variants.
Prove your setup is unbiased before you trust a result.
Test combinations of elements to find the best mix.
Compare entirely separate pages or redesigns.
Hold a variant across a whole journey, not one page.
Experiment below the page for pricing, logic & APIs.
A/B testing shows two or more variations of a page or element to different visitor segments to learn which converts best; multivariate testing varies several elements at once to find the winning combination. Both let you replace opinion with evidence — so every change you ship is one you’ve proven lifts revenue.
Most "best practices" don’t hold for your store. Testing tells you what actually works on your traffic.
A losing redesign shipped to everyone is expensive. Testing contains the risk to a slice of traffic.
A steady cadence of small, proven wins compounds into outsized revenue growth over a year.
Run a high-velocity testing program without engineering bottlenecks.
Test copy, offers, and layouts yourself — no code, no tickets.
Server-side and API testing for pricing, logic, and checkout.
A/B testing (split testing) compares two or more versions of a page or element to learn which drives more conversions, while multivariate testing varies several elements at once to find the winning combination. For D2C and ecommerce brands, A/B testing replaces opinion with evidence — every headline, price, image, layout, and CTA change is validated on real traffic before it ships to everyone.
CustomFit.ai runs client-side, server-side, and split-URL experiments from one visual editor, with a statistical engine that reports both Bayesian probability-to-beat-baseline and frequentist significance. Crucially, every test is judged on revenue per visitor and AOV — not just click-through — so a variant that lifts conversions but quietly erodes margin is caught by guardrail metrics.
A disciplined A/B testing program compounds: a steady cadence of small, proven wins adds up to outsized revenue growth over a year. With AI-assisted idea generation, no-code variant building, and autonomous traffic allocation, CustomFit lets growth teams ship more experiments per week without engineering bottlenecks.
A/B testing compares whole variations of a page; multivariate testing varies several elements simultaneously to find the best-performing combination. Use A/B for big, distinct changes and multivariate when you want to understand how individual elements interact.
Until it reaches statistical significance for your traffic and effect size — typically 1–2 weeks for most D2C stores. CustomFit shows a live significance readout so you know exactly when a result is trustworthy.
No. CustomFit serves variants over your canonical pages with no cloaking, so search engines index your primary content while you test.
Most ecom A/B tests reach statistical confidence in 7–14 days at typical traffic. CustomFit shows you the live probability-to-beat and the minimum sample needed, so you'll know exactly when you can call it.
No. Variants are layered on top of your live theme via our SDK — never edited in your repo. Rollback is instant, and Core Web Vitals stay green thanks to edge evaluation.
Yes. Visual edits live alongside JS/TS variants, server-side flag evaluation, and custom-event tracking. The same stats engine evaluates both.
Edge-side variant resolution means the right version renders on first paint, so your LCP and CLS metrics stay clean.
No. Marketers build experiments in a no-code visual editor; developers can use the API and SDKs when they want deeper control.
Other ways teams lift conversions with CustomFit.
Run unlimited experiments on the Growth plan. Live in 4 minutes — no card required.