A/B testing on autopilot, run by your AI agent.A/B testing on autopilot.
Run by ClaudeRun by ChatGPTRun by CursorRun by CodexRun by your agent

A website you can add one script to (or an agent that can, through your CMS or code) and an AI agent that speaks MCP: Claude, ChatGPT, Cursor or similar. Your agent connects to Duelpilot with one prompt.

Yes, on Pro and up. An owner switches autopilot on per site, and from then on the loop runs without you: your agent finds ideas, moves the best ones to Design (as many a week as you allow) and designs the variants, Duelpilot checks them on every device, and autopilot launches the agent's top-ranked variant against the original when every guardrail passes. Harmful tests pause themselves and conclusive results close on their own; shipping a winner stays your call. Without autopilot, your agent never launches a test without your explicit yes, on the board or in the chat with it; autopilot is your setting, enforced by Duelpilot's server. Code tests are always approved by a person. Prefer to approve every test yourself? Leave it off; it stays off until an owner turns it on.

The ones you set in Settings → Autopilot, and a launch must pass all of them: which kinds of change (copy, styling, layout and images by default; never custom JavaScript), which pages (never checkout, cart, payment, account, login or booking by default, plus the sensitive pages in your site profile), how much traffic (by default at most 50% per test and one autopilot test at a time), clean copy (no prices or claims that aren't on your page), a passing site check on every device the test targets, an active goal and a script that reported in the last 24 hours. If one fails, the test waits in Review with the reason. Every change to the guardrails is a new policy version, and every automatic launch records the version it used.

The script is 14 KB from a global edge network and runs before the page paints. Only the elements under test wait, usually for a few milliseconds; the page itself is never hidden. In our tests it costs about one network round trip.

If visitors see it in a browser, almost certainly. Duelpilot works on the finished page, so the framework doesn't matter: React and Next.js, Vue and Nuxt, Svelte, Astro, Turbo, single-page apps and sites with strict security headers are covered by our browser tests in Chrome, Safari and Firefox, and WordPress, Shopify, Webflow or Wix pages are ordinary HTML to it. What it can't change in the browser: content inside other companies' widgets (embedded iframes) and anything your server decides, like prices or search results. That is what code tests are for.

It finds them itself: the Analyst reads your analytics and the page structure and puts ideas on the board with evidence; the Designer inspects the page and checks every selector before it submits. You can point too: open 'Pick on my site' from your board and click any element on your live site to turn it into an idea, or use Point & comment on a preview to say 'make this bigger'. The pick link only works for signed-in members, expires after 30 minutes and only creates ideas, so nobody can change your site with it.

Yes for what most tests change: text, colours, styling, images, hiding and reordering keep the original element, with everything it does. New blocks a variant inserts are plain HTML, so a new button is a link, never a new script. Before anything can go live, the site check clicks the buttons, menus, date pickers and form fields in and around the change on phone, tablet and desktop, without sending anything, and compares the variant with the original: if something stopped responding, the check fails and you see it before you approve.

Changes in how something works (a new flow, a different date picker, fewer form fields, pricing or search logic) belong in your code. On the Code plan your own agent builds each variant behind a Duelpilot flag in your repository and opens the pull requests with its own GitHub access; Duelpilot never needs access to your code. Duelpilot splits the traffic, checks every variant's preview, measures, and when a winner ships your agent opens the clean-up pull request.

Duelpilot stores no visitor profiles: only daily totals per variant, and a random visitor id stays in the visitor's own browser. It follows your consent setup (Google Consent Mode, TCF or your cookie banner) and has a cookieless mode. Whether it may run before consent is your call; your agent asks you.

Yes, for every customer. Our Data Processing Agreement (GDPR art. 28) is part of the terms you accept when you choose a plan, so it is in place without paperwork; need a signed copy for your records? We send you the same text as a signed PDF. It lists what we process for you, our sub-processors, and that your visitors' data stays in the EU. Read it at /dpa.

No, but every plan is €0 until you launch your first test. You add payment details at signup and everything before the launch is free: connecting your agent, installing the script, your brand kit, ideas, designs, previews and site checks. Your plan starts when you launch your first test, and that first payment is taken then. No launch within 30 days? We cancel the plan automatically and you pay nothing. Plans from €9/month, flat per site.

So your first test can go live the moment you approve it: €0 until you launch your first test, and launching it starts your plan in the same step. If your bank asks to confirm the payment, the test waits in Review until you have, then launches with one click. Card, SEPA Direct Debit and iDEAL, depending on your country.

Nothing extra from us. The agents run in your own Claude (or other agent) subscription; Duelpilot never resells AI.

GA4: connect it in one click (Settings → Analytics). Duelpilot registers its custom dimensions in your property and shows GA4's view of every test next to its own counts, and your agent can read GA4 reports through Duelpilot. Variant events also go to Google Tag Manager, Adobe, PostHog, Mixpanel, Amplitude, Segment, Hotjar, Clarity, Plausible, Fathom, Matomo and datafa.st automatically; anything else gets them through a one-line bridge.