Comparison · Product experimentation

Duelpilot vs Statsig

Feature flags, experimentation and product analytics for engineering and product teams; agreed to join OpenAI in September 2025 and, per Statsig's own blog, was acquired by Amplitude on 5 May 2026. Duelpilot is A/B testing run by your own AI agent over MCP, with a person approving every launch. Both can be used by an AI agent over MCP. Statsig is priced by usage; Duelpilot is flat per site, without AI credits.

Last reviewed 2026-10-17Markdown version

At a glance

	Duelpilot	Statsig
MCP server or agent API	Yes Remote MCP server with 48 tools; OAuth for claude.ai and ChatGPT, bearer token elsewhere. source	Yes Official MCP server with experiment, gate and API tools. source
Your own agent designs variants	Yes Your agent designs 2–4 variants per idea, each with a preview and a device check. source	Yes experiment_create and gate_create. 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	Unknown No dedicated start or ship tool is documented; update and destructive tools need a confirmation parameter and review policies still apply. source
Visual tests on any website	Yes One script tag; works with React/Next.js, Vue, Astro, SPAs and strict CSP. source	Yes Sidecar: a visual editor delivered by one script tag. source
Server-side / code experiments	Yes Code plan only: your agent builds the arms in your repo behind Duelpilot flags. source	Yes Feature gates and server-side experiments are the core product. source
Sequential (peek-safe) statistics	Yes mSPRT: always-valid p-values, safe to check daily. source	Yes Frequentist sequential testing is available, plus a Bayesian mode and CUPED. source
Charges for AI usage / credits	No The AI runs in your own agent's subscription. source	Unknown No AI items on the pricing page. source
Free plan	No No free plan; your first test is free on every plan, Starter from €9/month. source	Yes Developer plan, 2M events per month. source
Pricing model	flat per site	by usage

Duelpilot and Statsig 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

Statsig

Pricing: by usage

Developer: Free (no credit card required), 2M events/mo; Pro: $150/mo including 5M events, then $0.05 per 1K events; Enterprise: Custom.

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 Statsig does well

Generous free tier with unlimited seats and flag checks (statsig.com/pricing).
Frequentist sequential testing, Bayesian mode and automatic CUPED (docs.statsig.com).
MCP server with create and update tools for experiments and gates (docs.statsig.com/integrations/mcp).
Sidecar visual editor for script-tag tests (docs.statsig.com/guides/sidecar-experiments/setup).

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 Statsig if…

Choose Statsig if your team ships product features in code and wants flags, experiments and product analytics on one platform with a strong statistics engine and a generous free tier.

Statsig website

Choose Duelpilot if…

Choose Duelpilot if your tests are on the website visitors see and you want your own agent to research, design and check them, with a person approving every launch and a flat price per site.

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

Who owns Statsig now?

Statsig agreed to join OpenAI in September 2025; a note on Statsig's own blog says it was acquired by Amplitude on 5 May 2026 (checked 17 Oct 2026).

Is Statsig's statistics engine sequential?

Yes, it offers frequentist sequential testing as well as a Bayesian mode and CUPED. Duelpilot also uses always-valid sequential statistics (mSPRT) with Holm correction and SRM checks.

Should a marketing team use Statsig or Duelpilot?

Statsig fits product and engineering teams working in code; Duelpilot fits teams who want website tests run by their own AI agent without SDK work.

Sources

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

MCP | Statsig Docs (checked 2026-10-17)
Setting up Sidecar | Statsig Docs (checked 2026-10-17)
Pricing | Statsig (checked 2026-10-17)
Frequentist Sequential Testing | Statsig Docs (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)