head to head · open source
SkillSpector vs beelzebub
SkillSpector has 23,981 GitHub stars, 2,070 forks, 136 open issues and last shipped yesterday. beelzebub has 2,227 stars, 220 forks, 5 open issues and last shipped 6 days ago. SkillSpector leads on adoption by 977% (23,981 vs 2,227 stars). SkillSpector is written in Python under Apache-2.0; beelzebub is written in Go under GPL-3.0. SkillSpector has attracted 9% as many forks as stars, beelzebub 10%. SkillSpector 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
| SkillSpector | beelzebub | |
|---|---|---|
| GitHub stars | ★ 24K | ★ 2.2K |
| License | Apache-2.0 | GPL-3.0 |
| Written in | Python | Go |
| Last push | 2026-11-02 | 2026-10-28 |
| Forks | ⑂ 2.1K | ⑂ 220 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick SkillSpector if
- You weight community size — 24K 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 SkillSpector
SkillSpector Security scanner for AI agent skills. Detect vulnerabilities, malicious patterns, and security risks before installing agent skills. Overview AI agent skills (used by Claude Code, Codex CLI, Gemini CLI, etc.) execute with implicit trust and minimal vetting. In the 31,132 skill analyzed subset of the research dataset, 26.1% of skills contain vulnerabilities and 5.2% show likely malicious intent . SkillSpector helps you answer: "Is this skill safe to install?" SkillSpector is part of the NVIDIA Verified Skills pipeline, which scans, evaluates, and signs agent skills before publication. Skills that…
read the full SkillSpector overview →
About beelzebub
Beelzebub Open source deception framework. Deploy realistic decoys. Observe attacker behavior. Turn interactions into security evidence. Explore Beelzebub Platform · Documentation · Quick start Beelzebub gives security teams a configurable way to study activity directed at decoy services. Define the environment an attacker encounters, choose how it responds, and capture the interaction for investigation. Run the framework independently or connect it to Beelzebub Platform. Why Beelzebub Deploy decoys that fit your environment. Define services, routes, and response rules in YAML. Use static handlers for…
read the full beelzebub overview →
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Frequently asked questions
Is SkillSpector or beelzebub more popular?
SkillSpector has 23,981 GitHub stars and beelzebub has 2,227. SkillSpector has the larger community by that measure.
Are SkillSpector and beelzebub free?
Both are open source. SkillSpector is licensed under Apache-2.0 and beelzebub under GPL-3.0. Neither carries a licence fee.
What is the difference between SkillSpector and beelzebub?
SkillSpector 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, SkillSpector or beelzebub?
Choose SkillSpector if you want the larger community (23,981 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.