Fewer subscriptions.
More vibe-coding.

Open-source tools & agent skills to build the things you’re paying for.

Unleash

Project13.9K

Self-host feature flags to control releases, target users, and roll out changes gradually.

Added 2026-10-07
Replaces
GitHub

What you can build

  • Gate a new checkout path behind a flag, then use gradual rollout strategies to expand availability as you release it.
  • Wrap a failure-prone application feature in a flag so your team can disable it without redeploying the application.
  • Build a beta release workflow that enables a feature for selected users while keeping it unavailable to other users.
  • Use flags to control experiment variants, and connect your application’s own event collection to assess the results.
  • Build an internal flag-review workflow using Unleash’s documented stale-flag insights to identify flags for follow-up.

Try this prompt

Build a small end-to-end feature rollout workflow using Unleash: create a flag for one application feature, connect it through the appropriate SDK, and demonstrate enabling it for a limited audience before expanding rollout. Include a clear fallback when the flag is disabled, setup notes, and a simple way to verify the behavior. Preserve existing application data and avoid logging or sending user data beyond what the workflow needs.

Get started

  1. Prepare a local instance

    Install Git and Docker, then use the repository’s Docker Compose setup to start Unleash locally.

  2. Open the interface

    Visit localhost:4242 in a browser and sign in with the local development credentials documented in the README.

  3. Connect an application

    Choose an SDK from the official SDK list and follow its setup guide. The local setup documents the API URLs and development tokens.

License & notes

AGPL-3.0The open-source edition has no software price stated here; self-hosting requires you to provide hosting and operations. Enterprise features are paid. Core feature-flag use does not require a model or paid API. AGPL-3.0 obligations may apply when distributing covered modifications or making a modified version available over a network.

  • Production use requires a persistent server and ongoing hosting and operational work; the local Docker setup is for getting started.
  • Some capabilities, including SSO, RBAC, more environments, and advanced segmentation, are listed as Enterprise features. Review AGPL-3.0 obligations for your deployment and modifications.

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