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Optimizely alternatives · Analytics

Open-source alternatives to Optimizely

Optimizely is not described as open source on its own site. 21 of the 100 other website and product analytics tools in this directory are open source, according to their own sites.

Optimizely's current pricing could not be confirmed from its own site. 17 of them are free or have a free plan.

21 tools · Listings checked up to Nov 13, 2026 · Where the facts come from

The 12 closest to Optimizely

  1. PostHog

    Open-source product analytics with replays, flags and surveys

    • PostHog has a free plan. Optimizely does not.
    • PostHog is open source and self-hostable, according to its own site.
    • PostHog also covers surveys, web analytics and session replay.
    • Optimizely also covers AI agents and reports.
    PostHog vs OptimizelyPostHog pricing and details

  2. GrowthBook

    Open-source feature flags and A/B testing on your own warehouse

    • GrowthBook has a free plan. Optimizely does not.
    • GrowthBook is open source and self-hostable, according to its own site.
    • GrowthBook also covers dashboards.
    • Optimizely also covers AI agents and reports.
    GrowthBook vs OptimizelyGrowthBook pricing and details

  3. Countly

    Self-hosted product analytics for web, mobile and desktop apps

    • Countly has a free plan. Optimizely does not.
    • Countly is open source and self-hostable, according to its own site.
    • Countly also covers surveys and web analytics.
    • Optimizely also covers AI agents and reports.
    Countly pricing and details

  4. Pirsch

    Privacy-friendly web analytics hosted in Germany

    • Pirsch is open source, according to its own site.
    • Pirsch also covers web analytics.
    • Optimizely also covers AI agents.
    Pirsch pricing and details

  5. Matomo

    Open-source web analytics you can host yourself or in Matomo's cloud

    • Matomo has a free plan. Optimizely does not.
    • Matomo is open source and self-hostable, according to its own site.
    • Matomo also covers web analytics and session replay.
    • Optimizely also covers AI agents and reports.
    Matomo pricing and details

  6. Umami

    Open-source, cookieless web and product analytics

    • Umami has a free plan. Optimizely does not.
    • Umami is open source and self-hostable, according to its own site.
    • Umami also covers web analytics and session replay.
    • Optimizely also covers AI agents and a/B testing.
    Umami pricing and details

  7. Counter.dev

    Free, open-source, cookie-free web analytics for small sites

    • Counter.dev has a free plan. Optimizely does not.
    • Counter.dev is open source, according to its own site.
    • Counter.dev also covers web analytics.
    • Optimizely also covers AI agents and a/B testing.
    Counter.dev pricing and details

  8. Koko Analytics

    Privacy-friendly analytics plugin for WordPress

    • Koko Analytics has a free plan. Optimizely does not.
    • Koko Analytics is open source, according to its own site.
    • Koko Analytics also covers web analytics.
    • Optimizely also covers AI agents and a/B testing.
    Koko Analytics pricing and details

  9. Swetrix

    Cookieless, open-source web analytics with session replays

    • Swetrix is open source and self-hostable, according to its own site.
    • Swetrix also covers dashboards, web analytics and session replay.
    • Optimizely also covers AI agents and reports.
    Swetrix pricing and details

  10. Rybbit

    Open-source, cookieless web analytics with session replay

    • Rybbit is open source and self-hostable, according to its own site.
    • Rybbit also covers dashboards, web analytics and session replay.
    • Optimizely also covers AI agents and a/B testing.
    Rybbit pricing and details

  11. Open Web Analytics

    Free self-hosted web analytics framework with heatmaps

    • Open Web Analytics has a free plan. Optimizely does not.
    • Open Web Analytics is open source and self-hostable, according to its own site.
    • Open Web Analytics also covers web analytics and session replay.
    • Optimizely also covers AI agents and a/B testing.
    Open Web Analytics pricing and details

  12. OpenPanel

    Open-source web and product analytics, cloud or self-hosted

    • OpenPanel has a free plan. Optimizely does not.
    • OpenPanel is open source and self-hostable, according to its own site.
    • OpenPanel also covers dashboards, web analytics and session replay.
    • Optimizely also covers AI agents, reports and a/B testing.
    OpenPanel pricing and details

9 more that are open source

All 21 in one table

Common questions

Is there an open-source alternative to Optimizely?

Yes. PostHog, GrowthBook, Countly, Pirsch, Matomo, Umami, Counter.dev, Koko Analytics and 13 more are open source, according to their own sites.

Is Optimizely open source?

Optimizely is not described as open source on its own site. The listing was checked on Nov 12, 2026 against the pages it cites.

Which of these website and product analytics tools are free?

PostHog, GrowthBook, Countly, Matomo, Umami, Counter.dev, Koko Analytics, Open Web Analytics and 9 more are free or have a free plan.

When was this checked?

Each listing shows its own date. On this page they run from Oct 18, 2026 to Nov 13, 2026. Vendors change prices and plans without notice, so confirm on their site before you buy.

This page is built from the listings. A tool is here because its listing says so, and the order is how close each is to Optimizely: the alternatives its listing names first, then the tools that share the most features with it.