head to head · open source
garak vs giskard-oss
garak has 9,308 GitHub stars, 1,294 forks, 429 open issues and last shipped 4 days ago. giskard-oss has 5,830 stars, 537 forks, 64 open issues and last shipped 2 days ago. garak leads on adoption by 60% (9,308 vs 5,830 stars). garak is written in Python under Apache-2.0; giskard-oss is written in Python under Apache-2.0. garak has attracted 14% as many forks as stars, giskard-oss 9%. giskard-oss 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 | ★ 9.3K | ★ 5.8K |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Python | Python |
| Last push | 2026-09-16 | 2026-09-18 |
| Forks | ⑂ 1.3K | ⑂ 537 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick garak if
- You weight community size — 9.3K 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 is a free, Apache 2.0 command line vulnerability scanner for large language models that probes generative AI systems for hallucination, data leakage, prompt injection, misinformation, toxicity generation, and jailbreaks, and it is aimed at security engineers, red teamers, and AI developers who need to test the models they ship.
read the full garak overview →
About giskard-oss
Giskard OSS is an open source Python library for evaluating, red teaming and testing LLM agents and RAG pipelines, built for developers, ML engineers and AI security teams that need reproducible checks on non deterministic systems.
read the full giskard-oss overview →
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Frequently asked questions
Is garak or giskard-oss more popular?
garak has 9,308 GitHub stars and giskard-oss has 5,830. 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 (9,308 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.