head to head · open source
giskard-oss vs beelzebub
giskard-oss has 5,830 GitHub stars, 537 forks, 64 open issues and last shipped 2 days ago. beelzebub has 2,180 stars, 209 forks, 5 open issues and last shipped 6 days ago. giskard-oss leads on adoption by 167% (5,830 vs 2,180 stars). giskard-oss is written in Python under Apache-2.0; beelzebub is written in Go under GPL-3.0. giskard-oss has attracted 9% as many forks as stars, beelzebub 10%. giskard-oss was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (llm), 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
| giskard-oss | beelzebub | |
|---|---|---|
| GitHub stars | ★ 5.8K | ★ 2.2K |
| License | Apache-2.0 | GPL-3.0 |
| Written in | Python | Go |
| Last push | 2026-09-18 | 2026-09-14 |
| Forks | ⑂ 537 | ⑂ 209 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick giskard-oss if
- You weight community size — 5.8K 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 beelzebub if
- You want the beelzebub feature set and don't need the biggest community
- You prefer the GPL-3.0 license terms
- Your stack matches Go
- You evaluated both and beelzebub fits your workflow better
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 →
About beelzebub
Beelzebub is an open source deception runtime framework written in Go and released under GPL 3.0. It operates in the cybersecurity and AI security ecosystem, where teams need controlled systems that attract and record activity aimed at decoy services. The project is a configurable runtime for honeypots, decoys, and agent facing bait tools, with documentation at docs.beelzebub.ai.
read the full beelzebub overview →
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Frequently asked questions
Is giskard-oss or beelzebub more popular?
giskard-oss has 5,830 GitHub stars and beelzebub has 2,180. giskard-oss has the larger community by that measure.
Are giskard-oss and beelzebub free?
Both are open source. giskard-oss is licensed under Apache-2.0 and beelzebub under GPL-3.0. Neither carries a licence fee.
What is the difference between giskard-oss and beelzebub?
giskard-oss is written in Python and beelzebub in Go. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, giskard-oss or beelzebub?
Choose giskard-oss if you want the larger community (5,830 stars) or its Apache-2.0 licence terms. Choose beelzebub if its feature set, stack or GPL-3.0 licence fits better. Both are self-hostable.