head to head · open source
lean-ctx vs CyberStrike
lean-ctx has 3,890 GitHub stars, 353 forks, 9 open issues and last shipped yesterday. CyberStrike has 3,199 stars, 528 forks, 43 open issues and last shipped 6 days ago. lean-ctx leads on adoption by 22% (3,890 vs 3,199 stars). lean-ctx is written in Rust under Apache-2.0; CyberStrike is written in TypeScript under AGPL-3.0. lean-ctx has attracted 9% as many forks as stars, CyberStrike 17%. lean-ctx was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (ai-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
| lean-ctx | CyberStrike | |
|---|---|---|
| GitHub stars | ★ 3.9K | ★ 3.2K |
| License | Apache-2.0 | AGPL-3.0 |
| Written in | Rust | TypeScript |
| Last push | 2026-10-19 | 2026-10-14 |
| Forks | ⑂ 353 | ⑂ 528 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick lean-ctx if
- You weight community size — 3.9K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Rust
- You value the larger contributor base for long-term maintenance
pick CyberStrike if
- You want the CyberStrike feature set and don't need the biggest community
- You prefer the AGPL-3.0 license terms
- Your stack matches TypeScript
- You evaluated both and CyberStrike fits your workflow better
About lean-ctx
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read the full lean-ctx overview →
About CyberStrike
English 简体中文 繁體中文 한국어 Deutsch Español Français Italiano Dansk 日本語 Polski Русский Bosanski العربية Norsk Português (Brasil) ไทย Türkçe Українська বাংলা Ελληνικά Tiếng Việt हिन्दी The first open source AI agent built for offensive security. Automated penetration testing from your terminal — plug in your Claude, GPT, or any LLM subscription and turn it into an autonomous red team agent with 13+ specialized agents, 7,600+ security skills, and 120+ OWASP test cases. 150+ AI providers • 5,300+ models • 56+ built in tools • 176+ MCP tools Quick Start • Intelligence Layer • What Makes It…
read the full CyberStrike overview →
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Frequently asked questions
Is lean-ctx or CyberStrike more popular?
lean-ctx has 3,890 GitHub stars and CyberStrike has 3,199. lean-ctx has the larger community by that measure.
Are lean-ctx and CyberStrike free?
Both are open source. lean-ctx is licensed under Apache-2.0 and CyberStrike under AGPL-3.0. Neither carries a licence fee.
What is the difference between lean-ctx and CyberStrike?
lean-ctx is written in Rust and CyberStrike in TypeScript. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, lean-ctx or CyberStrike?
Choose lean-ctx if you want the larger community (3,890 stars) or its Apache-2.0 licence terms. Choose CyberStrike if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.