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Unleash

Open-source feature flag platform you can self-host, with an enterprise edition for larger teams.

Open sourceSelf-hostableProduct analytics tools
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About Unleash

Unleash is one of the most widely used open-source feature flag projects, developed by a Norwegian company. Teams use it to separate deploys from releases: wrap code in flags, then enable features for specific users, run gradual rollouts, test in production and switch off problems quickly. It has more than 25 SDKs and an edge proxy for low-latency evaluation, and its enterprise features add change requests, audit logs, role-based access, SSO and release templates aimed at regulated industries such as banking. Unleash Open Source is free, self-hosted and has no seat limit, though it is restricted to a single project and a couple of environments. Unleash Enterprise is available as a hosted pay-as-you-go plan priced per seat, or self-hosted and hybrid under annual contracts, with a 14-day trial. It suits engineering teams who want to own their flag infrastructure; product managers may find its interface plainer than commercial rivals.

Best for: Engineering teams that want open-source flags they host themselves.

Pros and cons

What works

  • Free open-source edition with no seat limit
  • Self-hosted, cloud or hybrid deployment
  • Enterprise governance for regulated industries

Why people leave

  • Open-source edition limited to one project
  • Enterprise is priced per seat
  • Little built-in experiment analysis

Top Unleash alternatives

See all 6
  1. 1Flagsmith logo
    Flagsmith

    Open-source flags with remote config and a hosted free plan.

    66.5
  2. 2GrowthBook logo
    GrowthBook

    Open-source flags with built-in experiment analysis.

    62.6
  3. 3LaunchDarkly logo
    LaunchDarkly

    Managed feature management if you'd rather not run infrastructure.

    59.6
  4. 4Flipt logo
    Flipt

    Git-native open-source flags that live in your repositories.

    57.2
  5. 5GO Feature Flag logo
    GO Feature Flag

    A lightweight MIT-licensed flag service built on OpenFeature.

    55.3

Why people left Unleash

In reviewers' own words, from reviews of the apps they moved to. These are their opinions, not ours.

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Unleash: common questions

Is Unleash free?

Yes. Unleash is free, open-source software that you can host yourself.

Is Unleash open source?

Yes. The source code is on GitHub at Unleash/unleash. You can also run it on your own server.

What platforms does Unleash run on?

Unleash is available for Web and Self-hosted.

What are the best alternatives to Unleash?

The highest-ranked Unleash alternatives right now are Flagsmith, GrowthBook and LaunchDarkly. See the full ranked list for pricing, platforms and verified facts.

See all 6 Unleash alternatives