8 Best Statsig Alternatives for Flags and Experiments

The quick answer

Quick answer: GrowthBook is the closest Statsig alternative for warehouse-native experiments and flags, free on cloud for up to 3 users and $40 per seat a month on Pro, with a free open-source edition. PostHog matches Statsig's mix of flags, experiments, analytics and replay, with 1M flag requests free a month. LaunchDarkly is the enterprise release platform (free Developer plan, usage-based Foundation). Datadog Experiments, the former Eppo, starts at $450 per launched experiment a month billed annually. Optimizely suits large programs on custom plans, and Mixpanel adds experiments and up to 10 active flags to free analytics. For flags without heavy statistics, Unleash and Flagsmith are simpler. Prices are as of October 2026, checked on each vendor's own site.

Statsig today: ownership and pricing

Statsig's own history has two steps. On September 2, 2025, it announced a definitive agreement to join OpenAI. A note now added to that post says Statsig was acquired by Amplitude on May 5, 2026, and that the original team stayed at OpenAI while the product, brand and customers moved to Amplitude. Amplitude's announcement calls it a strategic partnership in which Amplitude takes on Statsig's brand and customers and will maintain the platform. In June 2026, Statsig's blog said about 50 Amplitude staff were maintaining it.

Statsig pricing as of October 2026:

• Developer: free, with 2M events, unlimited flag and config checks, 50,000 session replays a month and unlimited seats.
• Pro: $150 a month with 5M events included, then $0.05 per 1,000 events, plus change reviews and approvals.
• Enterprise: custom, with warehouse-native deployment, SSO and role-based access control.

Teams look at alternatives for three reasons: the change of owner and the move of the original engineering team to OpenAI, an event-based bill that grows with traffic beyond 5M events, and warehouse-native deployment and SSO only on Enterprise.

Statsig alternatives compared

1. GrowthBook

Who it is for: data teams that liked Statsig's warehouse-native mode and want an independent, open-core vendor.

Pricing: Starter is free on cloud for up to 3 users and 1 project. Pro is $40 per seat a month for up to 30 users and includes 2M managed-warehouse events a month. Enterprise is custom. The self-hosted open-source edition is free.

Strengths: Bayesian and frequentist statistics on every plan, sequential testing, CUPED and multi-arm bandits on Pro, unlimited flags and experiments on every plan, and most code under the MIT licence. GrowthBook publishes a Statsig comparison page.

Limits: seat pricing can add up for large teams, and holdouts and approval workflows need Enterprise.

2. PostHog

Who it is for: teams that used Statsig as an all-in-one product toolkit.

Pricing: each month includes 1M analytics events, 5K session recordings and 1M feature flag requests free. Flags then cost $0.0001 per request, decreasing with volume, and experiments are billed with flags.

Strengths: the broadest overlap with Statsig: flags, experiments, product analytics, session replay and surveys in one tool, with no minimum spend.

Limits: many separate usage meters to forecast. See PostHog alternatives for more on that.

3. LaunchDarkly

Who it is for: engineering-led organizations that want release governance first and experiments second.

Pricing: Developer is free with unlimited seats and flags and 100K experimentation MAU a month. Foundation is pay as you go at $10 per service connection and $8.33 per 1,000 client-side MAU a month, billed yearly. Enterprise is custom.

Strengths: CUPED, sequential testing, holdouts, multi-armed bandits and warehouse-native experiments, plus session replay and error monitoring.

Limits: scheduling, approvals and custom roles are Enterprise features. Compare options in our LaunchDarkly alternatives guide.

4. Datadog Experiments

Who it is for: teams that want statistical rigor on warehouse metrics, especially if they already use Datadog.

Pricing: Datadog Experiments starts at $450 per launched experiment a month billed annually ($575 on demand); an experiment is billable only once it reaches 500 subjects and 3 days of data. Datadog Feature Flags are free below 1M monthly configuration requests.

Strengths: Eppo's warehouse-native engine, now on Datadog, with experiments measured against business metrics in your warehouse and performance data from RUM.

Limits: priced per experiment, so a high-volume testing program costs more as it grows.

5. Optimizely

Who it is for: enterprises running experimentation across web, product and content teams.

Pricing: Optimizely says every plan is individually packaged, so there are no public prices. Its old Feature Experimentation page now redirects to Optimizely Feature Management.

Strengths: 20+ SDKs with local evaluation, progressive rollouts, kill switches, mutual exclusions, and its own Stats Engine with warehouse-native analytics.

Limits: there is no self-serve plan or public price, so buying goes through Optimizely's sales team.

6. Mixpanel

Who it is for: teams that used Statsig mostly for product analytics with occasional tests.

Pricing: Free covers up to 1M events, 1K experiment MEU and 10 active feature flags a month. Growth starts at $0 with the first 1M events free and up to 50 active flags; the estimator shows $120 a month billed yearly ($140 monthly) at 1.5M events a month.

Strengths: funnels, retention and cohorts with experiments built in. See Mixpanel alternatives for its rivals.

Limits: flag counts are capped by plan, unlike Statsig's unlimited flag checks.

7. Unleash

Who it is for: teams that only used Statsig's feature gates.

Pricing: Pay-As-You-Go is $75 per seat a month, billed monthly, with unlimited client-side MAU and a 14-day trial. Unleash Open Source is free.

Strengths: A/B/n testing with flag variants, approvals and stale flag tracking, and no billing on flag evaluations.

Limits: no product analytics, so results need another tool.

8. Flagsmith

Who it is for: teams that used Statsig dynamic configs and want open-source remote config.

Pricing: Free covers 50,000 requests a month. Start-Up is $40 a month billed yearly ($45 monthly) for 1M requests.

Strengths: BSD-3-Clause core, remote config, segments and A/B testing, with cloud, private cloud and self-hosted options.

Limits: lighter statistics than Statsig.

Tools we left out

Amplitude Experiment is not listed because Amplitude now runs Statsig. Its free plan includes unlimited feature flags, but experiment results need Growth or Enterprise, as covered in our Amplitude alternatives.

How to choose a Statsig alternative

List which Statsig parts you use and how many events, flags and experiments each consumes, since every alternative meters something different: seats, flag requests, events or launched experiments. Warehouse-native experiments point to GrowthBook or Datadog Experiments. The full flags, analytics and replay bundle points to PostHog. Release control points to LaunchDarkly, and gates alone to Unleash or Flagsmith. For more flag-first options, see our feature flag tools roundup. If what you tested was mostly in-app messaging, PLG OS's Growth plan ($149 a month) lists custom events, attributes and feature flags with audience segmentation for its in-app components.

FAQs

Who owns Statsig now?

Statsig's blog says Amplitude acquired it on May 5, 2026, after a 2025 agreement to join OpenAI. The original team stayed at OpenAI, and Amplitude now maintains the platform.

Is Statsig still available?

Yes. As of October 2026, Statsig still sells its free Developer plan, Pro at $150 a month and custom Enterprise plans.

What is the closest alternative to Statsig?

GrowthBook is closest for warehouse-native experiments, and PostHog is closest for the combined flags, experiments, analytics and replay bundle.

How much does Statsig cost?

As of October 2026, Developer is free with 2M events a month, Pro is $150 a month with 5M events and then $0.05 per 1,000 events, and Enterprise is custom.

Is there a free Statsig alternative?

Yes. GrowthBook, Unleash and Flagsmith have free open-source editions, and PostHog and Mixpanel have free cloud tiers.