head to head · open source
GrowthBook vs Abby
GrowthBook has 8,558 GitHub stars, 890 forks, 793 open issues and last shipped yesterday. Abby has 167 stars, 49 forks, 31 open issues and last shipped 1.3 years ago. GrowthBook leads on adoption by 5,025% (8,558 vs 167 stars). GrowthBook is written in TypeScript under a custom or non-standard licence; Abby is written in TypeScript under AGPL-3.0. GrowthBook has attracted 10% as many forks as stars, Abby 29%. GrowthBook was the more recently maintained of the two, and both are self-hostable with no licence fee.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| GrowthBook | Abby | |
|---|---|---|
| GitHub stars | ★ 8.6K | ★ 167 |
| License | Custom / other | AGPL-3.0 |
| Written in | TypeScript | TypeScript |
| Last push | 2026-11-02 | 2025-07-24 |
| Forks | ⑂ 890 | ⑂ 49 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick GrowthBook if
- You weight community size — 8.6K stars and counting
- You want the Custom / other license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick Abby if
- You want the Abby feature set and don't need the biggest community
- You prefer the AGPL-3.0 license terms
- Your stack matches TypeScript
- You evaluated both and Abby fits your workflow better
About GrowthBook
Open Source Feature Flags, Experimentation, and Product Analytics Create a free GrowthBook Cloud account to get started quickly. Or run it yourself with: Then visit View the full Self Hosting Instructions for more details. This pulls our prebuilt public Docker image and needs no registry credentials. If you instead build the image from the Dockerfile in this repo, its hardened base images come from Docker's dhi.io registry, which requires a one time docker login dhi.io with any free Docker account — see Building from source. Our Philosophy The top 1% of companies spend thousands of hours building their own in…
read the full GrowthBook overview →
About Abby
About Abby Abby is a open source feature management and A/B testing platform. It is designed to be easy to use and easy to integrate into your existing applications. It aims to improve the developer experience by providing a simple and statically typed API for feature management and A/B testing. Besides its official SDKS it also offers a friendly and easy to understand Dashboard for the non developers in your team. Abby focuses on privacy. This means it won't track any personalized user data and uses no marketing cookies. You can self host it or use the hosted version available at tryabby.com. Getting Started…
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Frequently asked questions
Is GrowthBook or Abby more popular?
GrowthBook has 8,558 GitHub stars and Abby has 167. GrowthBook has the larger community by that measure.
Are GrowthBook and Abby free?
Both are open source. GrowthBook has no licence declared in this registry, and Abby is licensed under AGPL-3.0. Both are free to self-host.
What is the difference between GrowthBook and Abby?
GrowthBook is written in TypeScript and Abby in TypeScript. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, GrowthBook or Abby?
Choose GrowthBook if you want the larger community (8,558 stars) or its Custom / other licence terms. Choose Abby if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.