Flagsmith vs GrowthBook

Flagsmith vs GrowthBook
Fact	Flagsmith	GrowthBook
Language	Python	TypeScript
Licence	BSD-3-Clause	Other
Stars	6.6k	8.5k
Latest	v2.280.0	v5.1.0
Last push	2026-10-06	2026-10-06
Release cadence	about 1 day between releases	about 44 days between releases
Active contributors	23 commit authors on the default branch in the last 90 days	37+ commit authors on the default branch in the last 90 days
Flags	none	none

How they relate

Both replace LaunchDarkly. Alternatives to LaunchDarkly →
Full replacementFlagsmithFeature flags, remote config and segments.
Full replacementGrowthBookFeature flags with A/B testing analysed from your own data warehouse.

v2.280.02026-10-05experimentation: read delivery statuses from Postgres and drop the ingestion Redis (#8643) (5c3ba28)
v2.279.02026-10-01experimentation: add the delivery connections db view and status table (#8622) (8ef97c9)
v2.278.12026-09-30api: SDK flag feature filter is case-sensitive (#8630) (c906648)
v2.278.02026-09-30api: Add an evaluation context mapping layer (#8573) (abd6780)
v2.277.02026-09-29SaaS: Add email verification as mandatory in SaaS (#8595) (4ce3684)

v5.1.02026-09-22GrowthBook 5.1 includes over 400 commits touching almost every part of the product. Below are some of the highlights.
v5.0.12026-08-19Fixes critical auth vulnerability affecting self-hosted non-SSO deployments with publicly accessible /auth/* endpoints
v5.0.02026-07-20Despite the major version bump, GrowthBook 5.0 does not have any breaking changes and can be upgraded to safely.
v4.4.02026-05-27This is our biggest release yet! Over 400 PRs closed.
v4.3.02026-02-04Post-Stratification - uses dimensions to reduce variance and get to statistical significance faster.

✓ signed The latest release, v2.280.0, carries a signature GitHub verified.

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✓ signed The latest release, v5.1.0, carries a signature GitHub verified.

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