One platform for the marketer who runs the test and the engineer who ships the stack — built natively for Shopify, WooCommerce, BigCommerce, and any modern web stack. An AI engine powers personalization, idea generation, and autonomous optimization across the platform.
Change content, layout, offers, and product recommendations based on each visitor's behavior, source, and intent.
Client-side, server-side, split-URL, multivariate. Bayesian + frequentist stats engine.
Plain-English prompt → live A/B test or personalization in seconds. Built into the editor.
Chrome extension opens your live store and lets marketers swap copy, images, CTAs visually.
Multi-armed bandit re-allocates traffic to winning variants in real time. Hands-off CRO.
40+ pre-built signals out of the box. Combine with AND / OR / NOT logic.
Progressive rollouts, kill-switches, percentage-based releases, SOC 2 audit log.
Drop-in modules your store was missing. Each is A/B-testable and personalization-aware.
Shopify, GA4, Segment, Klaviyo, Mixpanel, Slack, WhatsApp — plus webhooks & SDKs.
Open your live store in our Chrome extension, click any element, and edit it visually. Save as a variation, define an audience, ship a test — under 5 minutes from idea to live.
Stop stitching point tools. These capabilities share one editor, one audience model, and one analytics layer.
A/B, MVT, split-URL, server-side — one stats engine.
Explore →40+ signals, segment experiences, geo & intent.
Explore →Prompt-to-change building & CRO audits.
Explore →Staged rollouts and instant kill-switches.
Explore →100+ conversion blocks, fully on-brand.
Explore →Autonomous, bandit-driven optimization.
Explore →AI proposes a change & scaffolds the variant.
Attach it to an audience in the visual builder.
Every experience is an experiment by default.
Traffic shifts to the winner, per segment.
CustomFit.ai is an all-in-one experimentation and personalization platform for D2C and Shopify brands. It combines A/B & multivariate testing, real-time personalization, feature flags, an AI Copilot, 100+ widgets, and autonomous optimization — sharing one editor, one audience model, and one analytics layer.
Find leaks with analytics & Copilot audits.
Scaffold a change in the editor or by prompt.
Run it as an experiment with real stats.
Roll winners out to the right segments.
Experimentation and personalization in one place.
No-code editing and AI assistance.
Server-side, flags & a full API.
Having testing, personalization, and flags in one tool means no data silos and no integration glue. It just works together.
The CustomFit.ai platform is an all-in-one experimentation and personalization suite for D2C and Shopify brands. It combines A/B and multivariate testing, real-time personalization, feature flags, an AI Copilot, 100+ widgets, and autonomous optimization — sharing one editor, one audience model, and one analytics layer.
Because everything lives in one platform, there are no silos: an audience defined once powers tests, personalized experiences, widgets, and feature rollouts alike. Edge rendering keeps experiences flicker-free and Core Web Vitals green, while the AI Copilot can build a change from a plain-English prompt.
The workflow is a continuous loop — discover leaks with analytics and Copilot audits, build in the editor or by prompt, test with rigorous statistics, and roll winners out to the right segments — so the whole growth team moves from idea to measured impact in days.
A/B and multivariate testing, real-time personalization, feature flags, an AI Copilot, 100+ widgets, and autonomous optimization in one ecommerce-native platform.
Yes. CustomFit typically replaces three or more point tools, removing data silos and integration glue between testing and personalization.
Yes. Marketers run everything in a no-code editor with AI assistance, while engineers have server-side evaluation, flags, and a full API.
Join 2,400+ D2C brands shipping smarter experiments on CustomFit.ai.