Compare / Unleash vs Flagsmith
Unleash vs Flagsmith
Pick Unleash if you want the published LaunchDarkly/Split.io stack. Pick Flagsmith if you want BSD-3-Clause flags, remote config, and experiments.
Facts checked 22 Oct 2026. License, language, and GitHub activity come from the catalog or the project's own repo. "Not in the catalog row" means the public catalog dump does not store that number.
Unleash in the catalog Flagsmith in the catalog Start on Railway
How they compare
| Unleash | Flagsmith | |
|---|---|---|
| License | AGPL-3.0 (catalog) source | BSD-3-Clause (catalog) source |
| Language | TypeScript (catalog) | Python (catalog) |
| GitHub activity | 13,891 stars in the catalog source | 6,610 stars in the catalog source |
| Self-host | Published as /stacks/unleash-flags. Postgres control plane. | Same stack. Flags, remote config, experiments. |
| Best for | The published LaunchDarkly/Split.io replacement. | BSD remote config if Unleash is not the shape. |
Self-hosting and resource needs
Both are on /stacks/unleash-flags. Unleash is Unleash/unleash. Flagsmith is Flagsmith/flagsmith. GrowthBook is MIT core (skip enterprise/) — /compare/growthbook-vs-unleash. SDKs stay in the apps.
FAQ
- LaunchDarkly or Split.io?
- Same published stack — /replace/launchdarkly and /replace/split-io.
- Where is GrowthBook?
- /compare/growthbook-vs-unleash.
- Are these free?
- Unleash is AGPL-3.0. Flagsmith is BSD-3-Clause. You pay hosting.
- How do I deploy Unleash?
- Open /stacks/unleash-flags. Persist Postgres. Create one flag. Wire one SDK.
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