# Best Eppo (Datadog Experiments) alternatives in 2026

> 6 alternatives to Eppo (Datadog Experiments), listed by how close a substitute they are: tools in the same category first. The closest match is Amplitude Experiment. Duelpilot is our own product; it is placed by the same rule and marked as such. Facts are sourced and dated; unknown means we couldn't verify it.

Last reviewed: 2026-10-17 · HTML version: https://duelpilot.com/alternatives/eppo-alternatives

> **Short answer:** Stay with Eppo (Datadog Experiments) if this sounds like you: 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. Otherwise, pick by what you need most below.

## The Eppo (Datadog Experiments) alternatives

### Amplitude Experiment

*Product experimentation · Free: $0 (up to 2M events/month); Plus: Starts at $0; Growth: Custom; Enterprise: Custom. Experiment results are not included on Free or Plus.*

Feature and web experimentation built into Amplitude's product analytics, for product and growth teams; Amplitude also acquired Statsig in May 2026. Best for you if: Choose Amplitude Experiment if you already use Amplitude for product analytics and want experiments, flags and analysis in the same platform.

[Duelpilot vs Amplitude Experiment](https://duelpilot.com/compare/duelpilot-vs-amplitude-experiment) · [Amplitude Experiment website](https://amplitude.com/experiment)

### GrowthBook

*Product experimentation · Starter: Free, no credit card required (up to 3 users, 1 project); Pro: $40 / seat / month (up to 30 users); Enterprise: Custom. Open source self-hosting free.*

Open-source feature flags and warehouse-native A/B testing, self-hosted or cloud, for product, engineering and data teams. Best for you if: Choose GrowthBook if you have engineers and a data warehouse and want open-source feature flags and experiments you can self-host, analysed on your own data.

[Duelpilot vs GrowthBook](https://duelpilot.com/compare/duelpilot-vs-growthbook) · [GrowthBook website](https://www.growthbook.io)

### PostHog Experiments

*Product experimentation · Free every month: 1M feature flag requests; experiments are billed with feature flags; usage-based above the free allowance. PostHog AI: 500 credits (worth $5) free.*

Experiments built on feature flags inside PostHog's open-source product-analytics suite, for product engineers and startups. Best for you if: Choose PostHog if you want product analytics, session replay, feature flags and experiments in one developer-friendly platform, and you are comfortable letting agents launch and ship experiments from code.

[Duelpilot vs PostHog Experiments](https://duelpilot.com/compare/duelpilot-vs-posthog) · [PostHog Experiments website](https://posthog.com/experiments)

### Statsig

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

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. Best for you 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.

[Duelpilot vs Statsig](https://duelpilot.com/compare/duelpilot-vs-statsig) · [Statsig website](https://www.statsig.com)

### LaunchDarkly

*Feature flags · Developer: $0/mo (100K experimentation MAU, 1 project); Foundation: $10 per service connection/mo and $8.33 per 1K client-side MAU/mo; Enterprise: custom; Guardian: add-on.*

Feature management and release platform with experimentation, guarded rollouts and AI configs, for engineering teams. Best for you if: Choose LaunchDarkly if you need enterprise-grade feature management, progressive and guarded rollouts, and experiments on features your engineers ship.

[Duelpilot vs LaunchDarkly](https://duelpilot.com/compare/duelpilot-vs-launchdarkly) · [LaunchDarkly website](https://launchdarkly.com)

### Duelpilot (our product)

*Agentic CRO · 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.*

A/B testing run by your own AI agent (Claude, ChatGPT, Cursor or any MCP client): it installs one script, finds what to test, designs and checks the variants and reports; a person approves every launch. Best for you if: You already work in Claude, ChatGPT or Cursor and want tests without a CRO team, with a person approving every launch and a flat price per site.

[How it works](https://duelpilot.com/#how)

## Compared

Eppo (Datadog Experiments) and its alternatives. Each cell links to its source.

|  | Eppo (Datadog Experiments) | Amplitude Experiment | GrowthBook | PostHog Experiments | Statsig | LaunchDarkly | Duelpilot |
|---|---|---|---|---|---|---|---|
| MCP server or agent API | Yes — Datadog MCP Server with the experiments toolset enabled (off by default). [source](https://docs.datadoghq.com/mcp_server/tools/) | Yes — mcp.amplitude.com/mcp. [source](https://amplitude.com/docs/amplitude-ai/amplitude-mcp) | Yes — Hosted at mcp.growthbook.io/mcp or local via @growthbook/mcp. [source](https://docs.growthbook.io/integrations/mcp) | Yes — Official PostHog MCP (US and EU). [source](https://posthog.com/docs/model-context-protocol/tools) | Yes — Official MCP server with experiment, gate and API tools. [source](https://docs.statsig.com/integrations/mcp) | Yes — Hosted MCP at mcp.launchdarkly.com with OAuth. [source](https://launchdarkly.com/docs/home/getting-started/mcp-hosted) | Yes — Remote MCP server with 48 tools; OAuth for claude.ai and ChatGPT, bearer token elsewhere. [source](https://duelpilot.com/agents.md) |
| An agent can launch tests without a person | Yes — start\_experiment, conclude\_experiment and cancel\_experiment tools; no approval gate is documented. [source](https://docs.datadoghq.com/mcp_server/tools/) | Unknown — No dedicated start tool documented; update\_flag covers deployments. [source](https://amplitude.com/docs/amplitude-ai/amplitude-mcp) | Yes — Optional: the API write tool can start experiments; confirmation can be required per API key, and the bundled skills describe draft, review, publish. [source](https://docs.growthbook.io/integrations/mcp) | Yes — experiment-launch, -pause, -resume, -end and -ship-variant; approval is left to the MCP client, and write tools can be removed with read-only mode. [source 1](https://posthog.com/docs/model-context-protocol/tools), [source 2](https://posthog.com/docs/model-context-protocol/faq) | 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) | Yes — Tools such as toggle-flag, update-rollout and start-experiment-iteration exist; where an environment requires approval, the agent can only file an approval request for a reviewer. [source](https://launchdarkly.com/docs/home/getting-started/mcp-hosted) | 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) |
| Visual tests on any website | Unknown — No visual editor mentioned. [source](https://docs.datadoghq.com/experiments/) | Yes — Web Experiment with a visual editor, delivered by a script. [source](https://amplitude.com/docs/web-experiment/implementation) | Partly — AI Visual Editor (Chrome extension) on Pro and Enterprise; delivery through the Script Tag, JS/React or Edge SDK. [source](https://docs.growthbook.io/app/visual) | Partly — No-code web experiments exist; the docs warn that React, Vue and Angular re-renders may overwrite changes. [source](https://posthog.com/docs/experiments/no-code-web-experiments) | Yes — Sidecar: a visual editor delivered by one script tag. [source](https://docs.statsig.com/guides/sidecar-experiments/setup) | No — No visual editor for website tests found. [source](https://launchdarkly.com/pricing/) | Yes — One script tag; works with React/Next.js, Vue, Astro, SPAs and strict CSP. [source](https://duelpilot.com/index.md) |
| Server-side / code experiments | Yes — Randomization through Datadog Feature Flags. [source](https://docs.datadoghq.com/experiments/) | Yes — Feature Experiment with SDKs and flags. [source](https://amplitude.com/pricing) | Yes — Feature flags and server-side experiments are the core product. [source](https://www.growthbook.io/pricing) | Yes — Every experiment is backed by a feature flag. [source](https://posthog.com/docs/experiments) | Yes — Feature gates and server-side experiments are the core product. [source](https://www.statsig.com/pricing) | Yes — Feature flags are the core product. [source](https://launchdarkly.com/pricing/) | Yes — Code plan only: your agent builds the arms in your repo behind Duelpilot flags. [source](https://duelpilot.com/agents.md) |
| Sequential (peek-safe) statistics | Yes — Sequential frequentist, fixed-sample frequentist, sequential hybrid and Bayesian. [source](https://docs.datadoghq.com/experiments/) | Yes — mSPRT sequential testing is the default. [source](https://amplitude.com/docs/feature-experiment/under-the-hood/experiment-sequential-testing) | Yes — Sequential testing available with the frequentist engine; Bayesian is the default. [source](https://docs.growthbook.io/statistics/overview) | Yes — Optional sequential testing on the frequentist engine; Bayesian also available; optional CUPED. [source](https://posthog.com/docs/experiments/statistics-frequentist) | Yes — Frequentist sequential testing is available, plus a Bayesian mode and CUPED. [source](https://docs.statsig.com/experiments/advanced-setup/sequential-testing) | Yes — Sequential testing available with the frequentist method. [source](https://launchdarkly.com/docs/home/experimentation/analyze) | Yes — mSPRT: always-valid p-values, safe to check daily. [source](https://duelpilot.com/index.md) |
| Free plan | No — No free tier listed for Experiments. [source](https://www.datadoghq.com/pricing/?product=experiments) | Partly — Free plan exists, but with 1 active experiment per type and no experiment results on Free or Plus. [source](https://amplitude.com/pricing) | Yes — Starter is free for up to 3 users; self-hosted open source is free. [source](https://www.growthbook.io/pricing) | Yes — Monthly free allowance. [source](https://posthog.com/pricing) | Yes — Developer plan, 2M events per month. [source](https://www.statsig.com/pricing) | Yes — Developer plan. [source](https://launchdarkly.com/pricing/) | No — No free plan; your first test is free on every plan, Starter from €9/month. [source](https://duelpilot.com/pricing.md) |

## About Eppo (Datadog Experiments)

Warehouse-native experimentation, now sold as Datadog Experiments after Datadog acquired Eppo in 2025, for data and engineering teams. Pricing: Starting at $450 per launched experiment, per month (billed annually) or $575 on-demand; includes 1M flag configuration requests per experiment..

- 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).

[Full comparison: Duelpilot vs Eppo (Datadog Experiments)](https://duelpilot.com/compare/duelpilot-vs-eppo)

## 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

### What is the best alternative to Eppo (Datadog Experiments)?

It depends on why you're switching. The closest substitute is Amplitude Experiment, a good fit if: Choose Amplitude Experiment if you already use Amplitude for product analytics and want experiments, flags and analysis in the same platform. If you'd rather have your own AI agent run the tests, look at Duelpilot.

### Which Eppo (Datadog Experiments) alternatives have an MCP server?

Amplitude Experiment, GrowthBook, PostHog Experiments, Statsig, LaunchDarkly, Duelpilot (as documented by each vendor; see the table).

### Is there a free alternative to Eppo (Datadog Experiments)?

Yes: GrowthBook, PostHog Experiments, Statsig, LaunchDarkly have a free plan (limits differ; see each tool).

### Is Duelpilot a good Eppo (Datadog Experiments) alternative?

If you want your own agent (Claude, ChatGPT, Cursor) to research, design and check tests, and a person to approve every launch at a flat price per site, yes. Stay with Eppo (Datadog Experiments) if this sounds like you: 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.

## Sources

- [Datadog MCP Server Tools](https://docs.datadoghq.com/mcp_server/tools/) (checked 2026-10-17)
- [Experiments | Datadog Docs](https://docs.datadoghq.com/experiments/) (checked 2026-10-17)
- [Pricing | Datadog Experiments](https://www.datadoghq.com/pricing/?product=experiments) (checked 2026-10-17)
- [Amplitude MCP](https://amplitude.com/docs/amplitude-ai/amplitude-mcp) (checked 2026-10-17)
- [Implement Web Experiment | Amplitude](https://amplitude.com/docs/web-experiment/implementation) (checked 2026-10-17)
- [Pricing | Amplitude](https://amplitude.com/pricing) (checked 2026-10-17)
- [Sequential testing | Amplitude](https://amplitude.com/docs/feature-experiment/under-the-hood/experiment-sequential-testing) (checked 2026-10-17)
- [MCP Server | GrowthBook Docs](https://docs.growthbook.io/integrations/mcp) (checked 2026-10-17)
- [AI Visual Editor | GrowthBook Docs](https://docs.growthbook.io/app/visual) (checked 2026-10-17)
- [Pricing | GrowthBook](https://www.growthbook.io/pricing) (checked 2026-10-17)
- [Statistics Overview | GrowthBook Docs](https://docs.growthbook.io/statistics/overview) (checked 2026-10-17)
- [PostHog MCP tools reference](https://posthog.com/docs/model-context-protocol/tools) (checked 2026-10-17)
- [PostHog MCP FAQ](https://posthog.com/docs/model-context-protocol/faq) (checked 2026-10-17)
- [No-code web experiments | PostHog](https://posthog.com/docs/experiments/no-code-web-experiments) (checked 2026-10-17)
- [Experiments | PostHog](https://posthog.com/docs/experiments) (checked 2026-10-17)
- [Frequentist statistics | PostHog](https://posthog.com/docs/experiments/statistics-frequentist) (checked 2026-10-17)
- [Pricing | PostHog](https://posthog.com/pricing) (checked 2026-10-17)
- [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)
- [LaunchDarkly hosted MCP server](https://launchdarkly.com/docs/home/getting-started/mcp-hosted) (checked 2026-10-17)
- [Pricing | LaunchDarkly](https://launchdarkly.com/pricing/) (checked 2026-10-17)
- [Analyzing experiments | LaunchDarkly](https://launchdarkly.com/docs/home/experimentation/analyze) (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)

## Related

- [Duelpilot vs Eppo (Datadog Experiments)](https://duelpilot.com/compare/duelpilot-vs-eppo)
- [Best A/B testing tools in 2026](https://duelpilot.com/best-ab-testing-tools)
- [Agentic A/B testing explained](https://duelpilot.com/agentic-ab-testing)
- [All comparisons](https://duelpilot.com/compare)