Alternatives · Product experimentation

Best PostHog Experiments alternatives in 2026

6 alternatives to PostHog 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 2026-10-17Markdown version

Short answer

Stay with PostHog Experiments if this sounds like you: 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. Otherwise, pick by what you need most below.

The PostHog 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 Amplitude Experiment website

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)Eppo (Datadog Experiments) website

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 GrowthBook website

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 Statsig website

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 LaunchDarkly website

Duelpilotour 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

Compared

	PostHog Experiments	Amplitude Experiment	Eppo (Datadog Experiments)	GrowthBook	Statsig	LaunchDarkly	Duelpilot
MCP server or agent API	Yes Official PostHog MCP (US and EU). source	Yes mcp.amplitude.com/mcp. source	Yes Datadog MCP Server with the experiments toolset enabled (off by default). source	Yes Hosted at mcp.growthbook.io/mcp or local via @growthbook/mcp. source	Yes Official MCP server with experiment, gate and API tools. source	Yes Hosted MCP at mcp.launchdarkly.com with OAuth. source	Yes Remote MCP server with 48 tools; OAuth for claude.ai and ChatGPT, bearer token elsewhere. source
An agent can launch tests without a person	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, source 2	Unknown No dedicated start tool documented; update_flag covers deployments. source	Yes start_experiment, conclude_experiment and cancel_experiment tools; no approval gate is documented. source	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	Unknown No dedicated start or ship tool is documented; update and destructive tools need a confirmation parameter and review policies still apply. source	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	No A person approves every launch; an owner can switch on an autopilot policy with guardrails, never an agent. source
Visual tests on any website	Partly No-code web experiments exist; the docs warn that React, Vue and Angular re-renders may overwrite changes. source	Yes Web Experiment with a visual editor, delivered by a script. source	Unknown No visual editor mentioned. source	Partly AI Visual Editor (Chrome extension) on Pro and Enterprise; delivery through the Script Tag, JS/React or Edge SDK. source	Yes Sidecar: a visual editor delivered by one script tag. source	No No visual editor for website tests found. source	Yes One script tag; works with React/Next.js, Vue, Astro, SPAs and strict CSP. source
Server-side / code experiments	Yes Every experiment is backed by a feature flag. source	Yes Feature Experiment with SDKs and flags. source	Yes Randomization through Datadog Feature Flags. source	Yes Feature flags and server-side experiments are the core product. source	Yes Feature gates and server-side experiments are the core product. source	Yes Feature flags are the core product. source	Yes Code plan only: your agent builds the arms in your repo behind Duelpilot flags. source
Sequential (peek-safe) statistics	Yes Optional sequential testing on the frequentist engine; Bayesian also available; optional CUPED. source	Yes mSPRT sequential testing is the default. source	Yes Sequential frequentist, fixed-sample frequentist, sequential hybrid and Bayesian. source	Yes Sequential testing available with the frequentist engine; Bayesian is the default. source	Yes Frequentist sequential testing is available, plus a Bayesian mode and CUPED. source	Yes Sequential testing available with the frequentist method. source	Yes mSPRT: always-valid p-values, safe to check daily. source
Free plan	Yes Monthly free allowance. source	Partly Free plan exists, but with 1 active experiment per type and no experiment results on Free or Plus. source	No No free tier listed for Experiments. source	Yes Starter is free for up to 3 users; self-hosted open source is free. source	Yes Developer plan, 2M events per month. source	Yes Developer plan. source	No No free plan; your first test is free on every plan, Starter from €9/month. source

PostHog Experiments and its alternatives. Each cell links to its source.

About PostHog Experiments

Experiments built on feature flags inside PostHog's open-source product-analytics suite, for product engineers and startups. Pricing: 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..

Product analytics, session replay, feature flags and experiments in one platform (posthog.com).
Large free monthly allowance (posthog.com/pricing).
Bayesian or frequentist engine, optional sequential testing and CUPED (posthog.com/docs/experiments/statistics).
MCP covering the full experiment lifecycle (posthog.com/docs/model-context-protocol/tools).

Full comparison: Duelpilot vs PostHog Experiments

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 is the best alternative to PostHog 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 PostHog Experiments alternatives have an MCP server?

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

Is there a free alternative to PostHog Experiments?

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

Is Duelpilot a good PostHog 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 PostHog Experiments if this sounds like you: 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.

Sources

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

PostHog MCP tools reference (checked 2026-10-17)
PostHog MCP FAQ (checked 2026-10-17)
No-code web experiments | PostHog (checked 2026-10-17)
Experiments | PostHog (checked 2026-10-17)
Frequentist statistics | PostHog (checked 2026-10-17)
Pricing | PostHog (checked 2026-10-17)
Amplitude MCP (checked 2026-10-17)
Implement Web Experiment | Amplitude (checked 2026-10-17)
Pricing | Amplitude (checked 2026-10-17)
Sequential testing | Amplitude (checked 2026-10-17)
Datadog MCP Server Tools (checked 2026-10-17)
Experiments | Datadog Docs (checked 2026-10-17)
Pricing | Datadog Experiments (checked 2026-10-17)
MCP Server | GrowthBook Docs (checked 2026-10-17)
AI Visual Editor | GrowthBook Docs (checked 2026-10-17)
Pricing | GrowthBook (checked 2026-10-17)
Statistics Overview | GrowthBook Docs (checked 2026-10-17)
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)
LaunchDarkly hosted MCP server (checked 2026-10-17)
Pricing | LaunchDarkly (checked 2026-10-17)
Analyzing experiments | LaunchDarkly (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)