GrowthBook vs Flagsmith
Both in A/B testing & flags โ compared item by item
Flagsmith
Flagsmith is an open-source feature flag platform with remote config, experimentation, and self-hosted or cloud deployment options.
| GrowthBook | Flagsmith | |
|---|---|---|
| Stars | โ 8.4k | โ 6.6k |
| Language | TypeScript | Python |
| License | MIT | BSD-3-Clause |
| Last updated | 2026-09-22 | 2026-09-21 |
| Usage | ๐ณ Self-hosted / ๐ Online | ๐ณ Self-hosted / ๐ Online |
| Platforms | โ | โ |
| Category | A/B testing & flags | A/B testing & flags |
How to choose
- They support exactly the same usage modes; the difference is in ecosystem and implementation details.
- Both have comparable traction, so pick based on features and day-to-day experience.
- GrowthBook was updated more recently (2026-09-22).
- Different licenses (MIT vs BSD-3-Clause) โ check the terms before commercial use.