# Best Amplitude Experiment alternatives in 2026

> 6 alternatives to Amplitude Experiment, listed by how close a substitute they are: tools in the same category first. The closest match is Eppo (Datadog Experiments). 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/amplitude-experiment-alternatives

> **Short answer:** Stay with Amplitude Experiment if this sounds like you: Choose Amplitude Experiment if you already use Amplitude for product analytics and want experiments, flags and analysis in the same platform. Otherwise, pick by what you need most below.

## The Amplitude Experiment alternatives

### Eppo (Datadog Experiments)

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

Warehouse-native experimentation, now sold as Datadog Experiments after Datadog acquired Eppo in 2025, for data and engineering teams. Best for you 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.

[Duelpilot vs Eppo (Datadog Experiments)](https://duelpilot.com/compare/duelpilot-vs-eppo) · [Eppo (Datadog Experiments) website](https://www.datadoghq.com/product/experiments/)

### 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

Amplitude Experiment and its alternatives. Each cell links to its source.

|  | Amplitude Experiment | Eppo (Datadog Experiments) | GrowthBook | PostHog Experiments | Statsig | LaunchDarkly | Duelpilot |
|---|---|---|---|---|---|---|---|
| MCP server or agent API | Yes — mcp.amplitude.com/mcp. [source](https://amplitude.com/docs/amplitude-ai/amplitude-mcp) | Yes — Datadog MCP Server with the experiments toolset enabled (off by default). [source](https://docs.datadoghq.com/mcp_server/tools/) | 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 | Unknown — No dedicated start tool documented; update\_flag covers deployments. [source](https://amplitude.com/docs/amplitude-ai/amplitude-mcp) | Yes — start\_experiment, conclude\_experiment and cancel\_experiment tools; no approval gate is documented. [source](https://docs.datadoghq.com/mcp_server/tools/) | 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 | Yes — Web Experiment with a visual editor, delivered by a script. [source](https://amplitude.com/docs/web-experiment/implementation) | Unknown — No visual editor mentioned. [source](https://docs.datadoghq.com/experiments/) | 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 — Feature Experiment with SDKs and flags. [source](https://amplitude.com/pricing) | Yes — Randomization through Datadog Feature Flags. [source](https://docs.datadoghq.com/experiments/) | 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 — mSPRT sequential testing is the default. [source](https://amplitude.com/docs/feature-experiment/under-the-hood/experiment-sequential-testing) | Yes — Sequential frequentist, fixed-sample frequentist, sequential hybrid and Bayesian. [source](https://docs.datadoghq.com/experiments/) | 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 | Partly — Free plan exists, but with 1 active experiment per type and no experiment results on Free or Plus. [source](https://amplitude.com/pricing) | No — No free tier listed for Experiments. [source](https://www.datadoghq.com/pricing/?product=experiments) | 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 Amplitude Experiment

Feature and web experimentation built into Amplitude's product analytics, for product and growth teams; Amplitude also acquired Statsig in May 2026. Pricing: Free: $0 (up to 2M events/month); Plus: Starts at $0; Growth: Custom; Enterprise: Custom. Experiment results are not included on Free or Plus..

- Experiments and product analytics in one place (amplitude.com/pricing).
- Sequential testing (mSPRT) by default, with T-test and CUPED options (amplitude.com/docs).
- Hosted MCP server with experiment and flag tools; AI Agents and MCP on all plans (amplitude.com/docs/amplitude-ai/amplitude-mcp).

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

## 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 Amplitude Experiment?

It depends on why you're switching. The closest substitute is Eppo (Datadog Experiments), a good fit 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. If you'd rather have your own AI agent run the tests, look at Duelpilot.

### Which Amplitude Experiment alternatives have an MCP server?

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

### Is there a free alternative to Amplitude Experiment?

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

### Is Duelpilot a good Amplitude Experiment 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 Amplitude Experiment if this sounds like you: Choose Amplitude Experiment if you already use Amplitude for product analytics and want experiments, flags and analysis in the same platform.

## Sources

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