Founded in 2021, CustomFit.ai exists for one reason: ecommerce marketers shouldn't have to file dev tickets to ship a homepage banner. We built the platform we wished we had. Today the platform is AI-native, optimizing storefronts for 2,400+ brands.
D2C teams are bottlenecked by engineering capacity, not by ideas. Our mission is to remove that bottleneck — so the smartest marketer in the room is the rate-limiter, not the JIRA backlog.
A world where one ecom store dynamically becomes a million stores — one for each visitor — without a single engineer in the loop. We're building toward that future, one prompt at a time.
Winner — AI Product of the Year
A/B Testing & Personalization category
Featured app · 4.9★ rating
2024 award organizer
Every feature starts from a marketer’s job to be done.
Momentum beats perfection — we release weekly.
We let experiments settle debates, internally too.
Your lift is our roadmap.
Two marketers, tired of filing tickets to change a banner, start building.
Visual editor and A/B testing ship; early D2C brands come aboard.
Prompt-to-change building and page audits redefine the workflow.
Personalization, flags, Wingman & Copilot — one platform for D2C growth.
CustomFit.ai is a website personalization, A/B testing, and conversion optimization platform built for D2C and Shopify brands. Founded in 2021 by marketers tired of filing dev tickets, it lets growth teams personalize, test, and optimize their storefronts in real time — no engineers required.
Every feature starts from a marketer’s job.
We release continuously, not annually.
We let experiments settle debates.
Your lift is our roadmap.
Skincare, supplements, apparel & more.
Native plugin & checkout extensibility.
Localized stores for every market.
CustomFit feels like it was built by people who’ve actually run a growth team — because it was.
CustomFit.ai is a website personalization, A/B testing, and conversion optimization platform built for D2C and Shopify brands. Founded in 2021 by marketers tired of filing dev tickets, it lets growth teams personalize, test, and optimize their storefronts in real time — no engineers required.
Today the platform is AI-native, serving 2,400+ ecommerce brands and powered by the outcomes of 128k+ experiments. The philosophy is simple: every feature starts from a marketer’s job to be done, releases ship continuously, and experiments settle debates instead of opinions.
CustomFit serves D2C brands across skincare, supplements, apparel, and more, Shopify merchants with native checkout extensibility, and cross-border sellers who localize for every market — all from one connected platform.
2,400+ D2C and ecommerce brands across skincare, supplements, apparel, and more, plus Shopify merchants and cross-border sellers.
It’s built by marketers for marketers — AI-native, no-code, ecommerce-first, and bundling testing, personalization, and feature flags in one platform.
Join 2,400+ D2C brands shipping smarter experiments on CustomFit.ai.