head to head · open source
Anthropic-Cybersecurity-Skills vs Nettacker
Anthropic-Cybersecurity-Skills has 35,453 GitHub stars, 4,318 forks, 48 open issues and last shipped 2 months ago. Nettacker has 5,702 stars, 1,229 forks, 249 open issues and last shipped 4 days ago. Anthropic-Cybersecurity-Skills leads on adoption by 522% (35,453 vs 5,702 stars). Anthropic-Cybersecurity-Skills is written in Python under Apache-2.0; Nettacker is written in Python under Apache-2.0. Anthropic-Cybersecurity-Skills has attracted 12% as many forks as stars, Nettacker 22%. Nettacker 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
| Anthropic-Cybersecurity-Skills | Nettacker | |
|---|---|---|
| GitHub stars | ★ 35K | ★ 5.7K |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Python | Python |
| Last push | 2026-08-31 | 2026-10-30 |
| Forks | ⑂ 4.3K | ⑂ 1.2K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Anthropic-Cybersecurity-Skills if
- You weight community size — 35K 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 Nettacker if
- You want the Nettacker 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 Nettacker fits your workflow better
About Anthropic-Cybersecurity-Skills
Anthropic Cybersecurity Skills The largest open source cybersecurity skills library for AI agents 818 production grade cybersecurity skills · 34 security domains · 6 framework mappings · 26+ AI platforms Get Started · What's Inside · Frameworks · Platforms · Contributing ⚠️ Community Project — This is an independent, community created project. Not affiliated with Anthropic PBC. 🔐 Authorized & lawful use only. This library includes offensive and dual use techniques (e.g. red team C2, phishing simulation, exploitation) intended for authorized penetration testing, security research, defense, and education . Only…
read the full Anthropic-Cybersecurity-Skills overview →
About Nettacker
OWASP Nettacker ========= DISCLAIMER THIS SOFTWARE WAS CREATED FOR AUTOMATED PENETRATION TESTING AND INFORMATION GATHERING. YOU MUST USE THIS SOFTWARE IN A RESPONSIBLE AND ETHICAL MANNER. DO NOT TARGET SYSTEMS OR APPLICATIONS WITHOUT OBTAINING PERMISSIONS OR CONSENT FROM THE SYSTEM OWNERS OR ADMINISTRATORS. CONTRIBUTORS WILL NOT BE RESPONSIBLE FOR ANY ILLEGAL USAGE. OWASP Nettacker is an open source, Python based automated penetration testing and information gathering framework designed to help cyber security professionals and ethical hackers perform reconnaissance, vulnerability assessments, and network…
read the full Nettacker overview →
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Frequently asked questions
Is Anthropic-Cybersecurity-Skills or Nettacker more popular?
Anthropic-Cybersecurity-Skills has 35,453 GitHub stars and Nettacker has 5,702. Anthropic-Cybersecurity-Skills has the larger community by that measure.
Are Anthropic-Cybersecurity-Skills and Nettacker free?
Both are open source. Anthropic-Cybersecurity-Skills is licensed under Apache-2.0 and Nettacker under Apache-2.0. Neither carries a licence fee.
What is the difference between Anthropic-Cybersecurity-Skills and Nettacker?
Anthropic-Cybersecurity-Skills is written in Python and Nettacker 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, Anthropic-Cybersecurity-Skills or Nettacker?
Choose Anthropic-Cybersecurity-Skills if you want the larger community (35,453 stars) or its Apache-2.0 licence terms. Choose Nettacker if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.