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[ Tools · A/B testing for Webflow ]

Split

The A/B testing tool we built for Webflow: test changes on the components your site is built from, and let your AI agent run the testing with you.

  • Starter
  • Entry 06 of 06
  • Updated 2026-10-01
Split

Availability

Split is live on the Webflow Marketplace, and any Webflow team can install it. On the Webflow sites we build, we set it up and run the first tests with your team.

What it does

Most marketing teams test their ads relentlessly and never test the page the clicks land on. The budget gets optimised to a landing page nobody has ever questioned, and the biggest variable in the funnel stays a guess.

Split closes that gap. It runs controlled experiments on your live Webflow site: two versions of a headline, a hero, a pricing layout, shown to real visitors and measured against a real goal. The winner is a number, not an opinion.

We built Split for our own client work first, because the testing tools we tried did not understand how a component-driven Webflow site is put together. The full story is in the Split case study.

How it works

Tests are set up inside Webflow through the Split Designer Extension, on the components your site already uses: A/B tests, URL split tests and multivariate tests. A small script, about 8KB gzipped, serves each visitor their version consistently and removes the other version from the page entirely, so search engines see one clean page. There are no third-party cookies.

Results use sequential Bayesian statistics, so you can check a test at any time without being fooled by an early lead. When a result is clear, you ship the winner and the test is archived with its numbers.

What you get

A site that improves on evidence, and a testing rhythm your agent can run with you. Split has an MCP server, so the AI agent your team already uses can set up a test, check how it is doing and report back on what won, on whatever schedule you set. It is the same idea behind our agentic websites: the agent does the legwork, your team decides what ships.

Over time you build an archive of measured answers about your own audience: what you believed, what you tested and what actually worked.

How you get it

Install Split from the Webflow Marketplace, or start at withsplit.com. If we are building or running your Webflow site, we set it up for you and run the first tests alongside your team.

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// Tools · A/B testing for Webflow

# Split

 

The A/B testing tool we built for Webflow: test changes on the components your site is built from, and let your AI agent run the testing with you.

 

## Availability

 

Split is live on the Webflow Marketplace, and any Webflow team can install it. On the Webflow sites we build, we set it up and run the first tests with your team.

 

## What it does

 

Most marketing teams test their ads relentlessly and never test the page the clicks land on. The budget gets optimised to a landing page nobody has ever questioned, and the biggest variable in the funnel stays a guess.

 

Split closes that gap. It runs controlled experiments on your live Webflow site: two versions of a headline, a hero, a pricing layout, shown to real visitors and measured against a real goal. The winner is a number, not an opinion.

 

We built Split for our own client work first, because the testing tools we tried did not understand how a component-driven Webflow site is put together. The full story is in the [Split case study](/case-studies/split/).

 

## How it works

 

Tests are set up inside Webflow through the Split Designer Extension, on the components your site already uses: A/B tests, URL split tests and multivariate tests. A small script, about 8KB gzipped, serves each visitor their version consistently and removes the other version from the page entirely, so search engines see one clean page. There are no third-party cookies.

 

Results use sequential Bayesian statistics, so you can check a test at any time without being fooled by an early lead. When a result is clear, you ship the winner and the test is archived with its numbers.

 

## What you get

 

A site that improves on evidence, and a testing rhythm your agent can run with you. Split has an MCP server, so the AI agent your team already uses can set up a test, check how it is doing and report back on what won, on whatever schedule you set. It is the same idea behind our [agentic websites](/services/agentic-websites/): the agent does the legwork, your team decides what ships.

 

Over time you build an archive of measured answers about your own audience: what you believed, what you tested and what actually worked.

 

## How you get it

 

Install Split from the Webflow Marketplace, or start at withsplit.com. If we are building or running your Webflow site, we set it up for you and run the first tests alongside your team.