head to head · open source
garak vs giskard-oss
garak has 9,858 GitHub stars, 1,439 forks, 429 open issues and last shipped 3 days ago. giskard-oss has 5,946 stars, 561 forks, 64 open issues and last shipped 3 days ago. garak leads on adoption by 66% (9,858 vs 5,946 stars). garak is written in Python under Apache-2.0; giskard-oss is written in Python under Apache-2.0. garak has attracted 15% as many forks as stars, giskard-oss 9%. garak was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (llm-evaluation, llm-security), so they are genuine substitutes rather than adjacent tools.
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
| garak | giskard-oss | |
|---|---|---|
| GitHub stars | ★ 9.9K | ★ 5.9K |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Python | Python |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 1.4K | ⑂ 561 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick garak if
- You weight community size — 9.9K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick giskard-oss if
- You want the giskard-oss feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Python
- You evaluated both and giskard-oss fits your workflow better
About garak
garak, LLM vulnerability scanner Generative AI Red teaming & Assessment Kit garak checks if an LLM can be made to fail in a way we don't want. garak probes for hallucination, data leakage, prompt injection, misinformation, toxicity generation, jailbreaks, and many other weaknesses. If you know nmap or msf / Metasploit Framework, garak does somewhat similar things to them, but for LLMs. garak focuses on ways of making an LLM or dialog system fail. It combines static, dynamic, and adaptive probes to explore this. garak 's a free tool. We love developing it and are always interested in adding functionality to…
read the full garak overview →
About giskard-oss
Evals, Red Teaming and Test Generation for Agentic Systems Modular, Lightweight, Dynamic and Async first Docs • Website • Community [!IMPORTANT] Giskard v3 is a fresh rewrite designed for dynamic, multi turn testing of AI agents. This release drops heavy dependencies for better efficiency while introducing a more powerful AI vulnerability scanner and enhanced RAG evaluation — both now shipping natively in giskard scan , with no dependency on v2. Only the legacy scan for tabular/ML models remains v2 only. Giskard v2 remains available but is no longer actively maintained. Follow progress → Read the v3…
read the full giskard-oss overview →
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Frequently asked questions
Is garak or giskard-oss more popular?
garak has 9,858 GitHub stars and giskard-oss has 5,946. garak has the larger community by that measure.
Are garak and giskard-oss free?
Both are open source. garak is licensed under Apache-2.0 and giskard-oss under Apache-2.0. Neither carries a licence fee.
What is the difference between garak and giskard-oss?
garak is written in Python and giskard-oss in Python. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, garak or giskard-oss?
Choose garak if you want the larger community (9,858 stars) or its Apache-2.0 licence terms. Choose giskard-oss if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.