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GrowthBook

Open-source feature flags and an experiment statistics engine

Visit growthbook.io

Our verdict

#1 of 4 in Self-hosted feature flags · Best when the image includes a stats engine

Pros

  • Free self-host with unlimited users, on the pricing page
  • The Docker image bundles a Python stats engine
  • MIT on most of the code

Cons

  • MongoDB is required, on top of the container
  • Several directories use the GrowthBook Enterprise License
  • Cloud Pro is $40 a seat a month, $480 a seat a year

Who should skip:Anyone who will not run a database beside the app.

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

    One Docker image, plus a MongoDB or MongoDB-compatible database for credentials, cached results, and metadata.

  • Free self-hosted edition 5

    5/5 means: Self-hosting is free, and the pages state no cap on users or flags for that build

    The pricing page says the free self-hosted plan has unlimited users. The same answer says the cloud Starter plan is free for up to three users. Those are different caps.

  • Experiments 5

    5/5 means: A statistics engine for experiments, named in the open-source documentation

    The README, which is the open-source repository, names a statistics engine with CUPED, sequential testing, Bayesian analysis, and bandits, next to feature flags with experiments.

  • SDKs 5

    5/5 means: A single published count of 20 or more SDKs, repeated on the pages we checked, or that count plus OpenFeature

    The homepage says 24+ SDKs and the README says 24 SDKs. The homepage list includes OpenFeature providers. Both pages are the vendor's count.

  • Server license 4

    4/5 means: A permissive license for most of the code, with a commercial license on some directories

    Most of the repository is MIT. The README says several directories use the GrowthBook Enterprise License. The pricing page lists SSO and SCIM under the self-hosted Enterprise heading.

Pricing

  • Open source, self-hosted Free The pricing page says the free self-hosted plan has unlimited users.
  • Cloud Pro $40.00 /month per seat The pricing page lists this under a plan of up to 30 users.

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

Evidence and sources

Self-hosted feature flags scores

Setup 1 quote
  • “GrowthBook consists of a NextJS front-end, an ExpressJS API, and a Python stats engine. Everything is bundled together in a single Docker Image. In addition to the app itself, you will also need a MongoDB instance (or MongoDB compatible database) to store login credentials, cached experiment results, and metadata.”
    docs.growthbook.io/self-host · checked
Free self-hosted edition 1 quote
  • “Yes. The Starter plan is free for up to three users and includes unlimited feature flags and experiments on GrowthBook's cloud platform, making it easy for small teams to create feature flags and set up experiments for free. The free self-hosted plan has unlimited users.”
    growthbook.io/pricing · checked
Experiments 2 quotes
SDKs 2 quotes
  • “24+ SDKs designed for modern apps and websites with 50% smaller SDKs, zero network calls, plus server, client, mobile, and edge compatibility. JavaScript, Python, React, iOS.”
    growthbook.io · checked
  • “💻 24 SDKs including React, Python, Android, and iOS. View all”
    github.com/growthbook/growthbook · checked
Server license 2 quotes
  • “GrowthBook is an Open Core product. The bulk of the code is under the permissive MIT license. There are several directories that are governed under a separate commercial license, the GrowthBook Enterprise License.”
    github.com/growthbook/growthbook · checked
  • “Open Source, plus: Custom environments Advanced access control SSO & SCIM provisioning”
    growthbook.io/pricing · checked

Facts

License 1 quote
  • “GrowthBook is an Open Core product. The bulk of the code is under the permissive MIT license. There are several directories that are governed under a separate commercial license, the GrowthBook Enterprise License.”
    github.com/growthbook/growthbook · checked
Runs on 1 quote
  • “GrowthBook consists of a NextJS front-end, an ExpressJS API, and a Python stats engine. Everything is bundled together in a single Docker Image. In addition to the app itself, you will also need a MongoDB instance (or MongoDB compatible database) to store login credentials, cached experiment results, and metadata.”
    docs.growthbook.io/self-host · checked
Needs 1 quote
  • “GrowthBook consists of a NextJS front-end, an ExpressJS API, and a Python stats engine. Everything is bundled together in a single Docker Image. In addition to the app itself, you will also need a MongoDB instance (or MongoDB compatible database) to store login credentials, cached experiment results, and metadata.”
    docs.growthbook.io/self-host · checked

Other quotes

Not cited by a score or fact 3 quotes
  • “$40 / seat / month”
    growthbook.io/pricing · checked
  • “The Pro tier adds more seats (up to 30 users) and advanced experimentation features such as sequential testing, CUPED variance reduction, sticky bucketing, URL split tests, and built-in product analytics.”
    growthbook.io/pricing · checked
  • “We are fanatical about performance. Our SDKs are crazy fast, lightweight, and evaluate everything locally with no network requests.”
    docs.growthbook.io · checked

Pricing

growthbook.io/pricing · checked