Comparison · Product experimentation

Duelpilot vs Eppo (Datadog Experiments)

Warehouse-native experimentation, now sold as Datadog Experiments after Datadog acquired Eppo in 2025, for data and engineering teams. 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. The biggest difference is who launches: in Eppo (Datadog Experiments) an agent can start tests itself, in Duelpilot a person approves (or an owner's autopilot policy, within guardrails). Eppo (Datadog Experiments) is priced by usage; Duelpilot is flat per site, without AI credits.

Last reviewed 2026-10-17Markdown version

At a glance

	Duelpilot	Eppo (Datadog Experiments)
MCP server or agent API	Yes Remote MCP server with 48 tools; OAuth for claude.ai and ChatGPT, bearer token elsewhere. source	Yes Datadog MCP Server with the experiments toolset enabled (off by default). 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 create_experiment, create_datadog_feature_flag, link_feature_flag_to_experiment. 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	Yes start_experiment, conclude_experiment and cancel_experiment tools; no approval gate is documented. source
Visual tests on any website	Yes One script tag; works with React/Next.js, Vue, Astro, SPAs and strict CSP. source	Unknown No visual editor mentioned. source
Server-side / code experiments	Yes Code plan only: your agent builds the arms in your repo behind Duelpilot flags. source	Yes Randomization through Datadog Feature Flags. source
Sequential (peek-safe) statistics	Yes mSPRT: always-valid p-values, safe to check daily. source	Yes Sequential frequentist, fixed-sample frequentist, sequential hybrid and Bayesian. source
Charges for AI usage / credits	No The AI runs in your own agent's subscription. source	Unknown Not stated for Experiments. source
Free plan	No No free plan; your first test is free on every plan, Starter from €9/month. source	No No free tier listed for Experiments. source
Pricing model	flat per site	by usage

Duelpilot and Eppo (Datadog Experiments) 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

Eppo (Datadog Experiments)

Pricing: by usage

Starting at $450 per launched experiment, per month (billed annually) or $575 on-demand; includes 1M flag configuration requests per experiment.

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 Eppo (Datadog Experiments) does well

Four analysis methods including sequential frequentist and Bayesian (docs.datadoghq.com/experiments).
Full experiment lifecycle available in the Datadog MCP server's experiments toolset (docs.datadoghq.com/mcp_server/tools).
Billed only for experiments that launch and reach a minimum of data (datadoghq.com/pricing).

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 Eppo (Datadog Experiments) if…

Choose Datadog Experiments if you already run on Datadog, analyse in a data warehouse and want rigorous, engineering-owned experiments next to your observability data.

Eppo (Datadog Experiments) website

Choose Duelpilot if…

Choose Duelpilot if you run website tests every week: a Duelpilot site costs €49 per month flat, less than one launched Datadog experiment, and your own agent does the research and design.

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

What happened to Eppo?

Datadog acquired Eppo in 2025; it is now offered as Datadog Experiments, priced per launched experiment.

Can an agent start a Datadog experiment?

Yes, the Datadog MCP experiments toolset includes start_experiment and conclude_experiment. Duelpilot has no launch tool; people or an owner's autopilot policy launch.

Does Datadog Experiments do visual website tests?

We found no visual editor in its docs (checked 17 Oct 2026). Duelpilot's visual tests run from one script tag on any website.

Sources

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

Datadog MCP Server Tools (checked 2026-10-17)
Experiments | Datadog Docs (checked 2026-10-17)
Pricing | Datadog Experiments (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)