head to head · open source
Flagsmith vs Opengrep
Flagsmith has 6,559 GitHub stars, 568 forks, 711 open issues and last shipped yesterday. Opengrep has 3,084 stars, 263 forks, 92 open issues and last shipped yesterday. Flagsmith leads on adoption by 113% (6,559 vs 3,084 stars). Flagsmith is written in Python under BSD-3-Clause; Opengrep is written in OCaml under LGPL-2.1. Flagsmith has attracted 9% as many forks as stars, Opengrep 9%. Opengrep 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
| Flagsmith | Opengrep | |
|---|---|---|
| GitHub stars | ★ 6.6K | ★ 3.1K |
| License | BSD-3-Clause | LGPL-2.1 |
| Written in | Python | OCaml |
| Last push | 2026-09-17 | 2026-09-17 |
| Forks | ⑂ 568 | ⑂ 263 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Flagsmith if
- You weight community size — 6.6K stars and counting
- You want the BSD-3-Clause license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick Opengrep if
- You want the Opengrep feature set and don't need the biggest community
- You prefer the LGPL-2.1 license terms
- Your stack matches OCaml
- You evaluated both and Opengrep fits your workflow better
About Flagsmith
Flagsmith is an open source feature flag and remote configuration platform, written in Python and released under the BSD 3 Clause licence, for engineering teams that need to toggle, segment and roll out features across web, mobile and server side applications without deploying new code.
read the full Flagsmith overview →
About Opengrep
Opengrep is an open source static code analysis engine for finding security issues in code. It is a fork of Semgrep, released under the LGPL 2.1 license, and is backed by a consortium of AppSec organizations, including Aikido, Amplify, Endor Labs, Kodem, and Orca Security. The project lives in the developer security ecosystem as a command line SAST tool that scans source code for patterns and vulnerabilities.
read the full Opengrep overview →
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Frequently asked questions
Is Flagsmith or Opengrep more popular?
Flagsmith has 6,559 GitHub stars and Opengrep has 3,084. Flagsmith has the larger community by that measure.
Are Flagsmith and Opengrep free?
Both are open source. Flagsmith is licensed under BSD-3-Clause and Opengrep under LGPL-2.1. Neither carries a licence fee.
What is the difference between Flagsmith and Opengrep?
Flagsmith is written in Python and Opengrep in OCaml. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Flagsmith or Opengrep?
Choose Flagsmith if you want the larger community (6,559 stars) or its BSD-3-Clause licence terms. Choose Opengrep if its feature set, stack or LGPL-2.1 licence fits better. Both are self-hostable.