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Unleash

An open-source feature flag server with paid seats above the free caps

Visit getunleash.io

Our verdict

#4 of 4 in Self-hosted feature flags · For one project on the free edition

Pros

  • No seat cap on the open-source edition
  • AGPL-3.0
  • The $75 price is per Unleash user, and the page says so

Cons

  • Free caps: 1 project, 2 environments, 5,000 flags
  • SSO, SCIM, granular RBAC, and change requests are excluded from that edition
  • The homepage and the README disagree on how many SDKs exist

Who should skip:A team that needs more than one project before it pays.

Read the full review →

Rankings and alternatives

Self-hosted feature flags scores

Evaluated Nov 8, 2026 Evidence ↓
  • Setup 3

    3/5 means: A container plus one database server

    Docker or Node.js, plus PostgreSQL. The getting-started example uses Postgres 17, or any 15 or newer.

  • Free self-hosted edition 3

    3/5 means: Free self-hosting with a stated cap on projects, environments, or flags

    The pricing page says the open-source self-hosted edition is free with no seat cap, and with a cap of 1 project, 2 environments, and 5,000 flags. SSO, SCIM, granular RBAC, and change-request approvals are not included.

  • Experiments 4

    4/5 means: Percentage or multivariate tests the project calls A/B tests

    The README lists A/B testing among features, above the list of things it points at Pro and Enterprise. It does not name a statistics engine on that page.

  • SDKs 4

    4/5 means: A large SDK list, or OpenFeature plus several languages. Conflicting counts on the project's own pages keep this from a 5

    The homepage says 25+ official SDKs. The README says 15 official client and server SDKs, and later 12 official SDKs. The pages disagree, so the score stays short of the top of the scale. OpenFeature is not mentioned on the pages checked.

  • Server license 3

    3/5 means: AGPL or GPL on the server

    The GitHub repository shows an AGPL-3.0 license.

Pricing

  • Open source, self-hosted Free Free, with a stated cap of 1 project, 2 environments, and 5,000 flags. No seat cap on this edition.
  • Pay as you go $75.00 /month per seat A seat is a user of Unleash, not a user of your application. The pricing page says this includes a 14-day trial.

From the vendor’s pricing page, checked Nov 8, 2026. That page is authoritative.

Evidence and sources

Self-hosted feature flags scores

Setup 2 quotes
Free self-hosted edition 2 quotes
  • “Yes. Unleash Open Source is free, self-hosted, and has no limit on seats. It covers the core feature set, with a limit of 1 project, 2 environments, and 5,000 feature flags per instance.”
    getunleash.io/pricing · checked
  • “It does not include single sign-on, SCIM provisioning, granular role-based access control, change request approvals, or a support SLA.”
    getunleash.io/pricing · checked
Experiments 1 quote
SDKs 3 quotes
  • “Unleash provides 25+ official SDKs covering all major languages and frameworks, including Node.js, Java, Go, Python, .NET, Ruby, PHP, Rust, React, Vue, Svelte, Next.js, React Native, Android, iOS, and Flutter.”
    getunleash.io · checked
  • “It supports 15 official client and server SDKs and over 15 community SDKs.”
    github.com/Unleash/unleash · checked
  • “12 official SDKs, and 10 community-contributed SDKs”
    github.com/Unleash/unleash · checked
Server license 1 quote

Facts

License 1 quote
Runs on 1 quote
  • “Run it via Docker with the official Docker image or as a pure Node.js application”
    github.com/Unleash/unleash · checked
Needs 1 quote

Other quotes

Not cited by a score or fact 2 quotes
  • “Unleash Enterprise Pay-As-You-Go costs $75 per seat per month, billed monthly by credit card, with no contract. A seat is a user of Unleash, not a user of your application.”
    getunleash.io/pricing · checked
  • “By default, your self-hosted Unleash instance periodically checks https://version.unleash.run to inform you about new releases. This check sends a unique, anonymous instance ID.”
    docs.getunleash.io/deploy/getting-started · checked

Pricing

getunleash.io/pricing · checked