# 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: 2026-10-17 · HTML version: https://duelpilot.com/compare/duelpilot-vs-statsig

## At a glance

Duelpilot and Statsig side by side. Each cell links to its source.

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

## 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](https://duelpilot.com/pricing.md)

### 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](https://www.statsig.com/pricing)

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](https://www.statsig.com)

### 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](https://duelpilot.com/#how)

## Try Duelpilot with your own agent

Give your agent one line: [set up Duelpilot for my site using /agents.md](https://duelpilot.com/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](https://duelpilot.com/login) or [see pricing](https://duelpilot.com/#pricing).

## FAQ

### 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

- [MCP | Statsig Docs](https://docs.statsig.com/integrations/mcp) (checked 2026-10-17)
- [Setting up Sidecar | Statsig Docs](https://docs.statsig.com/guides/sidecar-experiments/setup) (checked 2026-10-17)
- [Pricing | Statsig](https://www.statsig.com/pricing) (checked 2026-10-17)
- [Frequentist Sequential Testing | Statsig Docs](https://docs.statsig.com/experiments/advanced-setup/sequential-testing) (checked 2026-10-17)
- [Duelpilot instructions for AI agents](https://duelpilot.com/agents.md) (checked 2026-10-17)
- [Duelpilot overview](https://duelpilot.com/index.md) (checked 2026-10-17)
- [Duelpilot pricing](https://duelpilot.com/pricing.md) (checked 2026-10-17)

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- [All comparisons](https://duelpilot.com/compare)