Comparison · Discontinued and legacy tools

Duelpilot vs Google Optimize

Google's free A/B testing and personalization tool, shut down on 30 September 2023; Google now points users to third-party testing tools that integrate with Google Analytics. Duelpilot is A/B testing run by your own AI agent over MCP, with a person approving every launch. Google Optimize has no MCP server or agent API we could find, so your own agent can't drive it directly. Google Optimize is priced not published; Duelpilot is flat per site, without AI credits.

Last reviewed 2026-10-17Markdown version

At a glance

	Duelpilot	Google Optimize
MCP server or agent API	Yes Remote MCP server with 48 tools; OAuth for claude.ai and ChatGPT, bearer token elsewhere. source	No Discontinued in 2023. source
Your own agent designs variants	Yes Your agent designs 2–4 variants per idea, each with a preview and a device check. source	No Discontinued. source
An agent can launch tests without a person	No A person approves every launch; an owner can switch on an autopilot policy with guardrails, never an agent. source	No Discontinued. source
Visual tests on any website	Yes One script tag; works with React/Next.js, Vue, Astro, SPAs and strict CSP. source	No No longer available. source
Server-side / code experiments	Yes Code plan only: your agent builds the arms in your repo behind Duelpilot flags. source	No No longer available. source
Sequential (peek-safe) statistics	Yes mSPRT: always-valid p-values, safe to check daily. source	No No longer available. source
Charges for AI usage / credits	No The AI runs in your own agent's subscription. source	No No longer available. source
Free plan	No No free plan; your first test is free on every plan, Starter from €9/month. source	No The free tool was shut down on 30 September 2023. source
Pricing model	flat per site	not published

Duelpilot and Google Optimize side by side. Each cell links to its source.

Pricing

Duelpilot

Pricing: flat per site

Starter €9/month (€7 billed yearly); Pro €49/month (€39 billed yearly); Team €149/month (€119 billed yearly, 5 sites); Code €199/month (€159 billed yearly, 5 sites); Enterprise on request. No free plan; the first test is free on every plan.

source

Google Optimize

Pricing: not published

Discontinued: Google Optimize and Optimize 360 are no longer available as of September 30, 2023.

source

Prices as published by each vendor on the date checked, excluding VAT. Duelpilot has no visitor meters and no AI credits: the AI runs in your own agent's subscription.

What Google Optimize does well

Was free and tightly integrated with Google Analytics (support.google.com/optimize/answer/12979939).
Google named AB Tasty, Optimizely and VWO as integration partners and opened its APIs for any testing tool (support.google.com/optimize/answer/12979939).

What Duelpilot does well

Your own agent does the research, design, checks and monitoring over MCP (48 tools); no AI bill from Duelpilot.
A person approves every launch: no MCP tool can approve, launch, pick a winner or ship.
Always-valid sequential statistics (mSPRT) with Holm correction, sample-ratio-mismatch checks and guardrail metrics.
Every variant gets a preview link and a site check on phone, tablet and desktop before anyone can approve it.
Flat price per site, published, from €9/month, and your first test is free on every plan; no visitor meters.

Where Duelpilot falls short

You need an AI agent that speaks MCP; without one there is no visual editor to build variants by hand.
No heatmaps or session recordings: Duelpilot counts results and sends variants to your own analytics.
A young product (2026): fewer integrations and a shorter track record than established tools.

Which one should you choose?

Choose Google Optimize if…

Google Optimize is no longer available. If you want what it offered inside Google's own stack, look at the partners Google named for Google Analytics integration (AB Tasty, Optimizely, VWO).

Google Optimize website

Choose Duelpilot if…

Choose Duelpilot if you liked Optimize's free entry point and GA integration: Duelpilot's first test is free on every plan (from €9/month after it), it sets up GA4 automatically (custom dimensions and results back in Duelpilot) and your own agent does the test work.

How Duelpilot works

Try Duelpilot with your own agent

Give your agent one line: set up Duelpilot for my site using /agents.md. It opens a workspace, installs and verifies the script, and drafts the first test; you approve what goes live. Try your first test free or see pricing.

Questions

When did Google Optimize shut down?

Google Optimize and Optimize 360 stopped on 30 September 2023, per Google's help page.

Is there an A/B testing feature inside GA4?

No. Google recommends third-party testing tools that integrate with Google Analytics.

What is the closest free replacement?

Several tools have free plans (GrowthBook, Optibase, PostHog, Statsig, Amplitude with limits). Duelpilot has no free plan, but your first test is free on every plan and Starter covers one site and one live test for €9/month, with GA4 set up for you.

Do I need to move my GA4 setup to use Duelpilot?

No. Duelpilot connects to GA4 with OAuth, creates the custom dimensions it needs and sends variant events to GA4.

Sources

Last reviewed 2026-10-17. Spot an error? Tell us.

[Sunset September 2023] Google Optimize (checked 2026-10-17)
Duelpilot instructions for AI agents (checked 2026-10-17)
Duelpilot overview (checked 2026-10-17)
Duelpilot pricing (checked 2026-10-17)