head to head · open source
shannon vs api-relay-audit
shannon has 50,964 GitHub stars, 5,926 forks, 18 open issues and last shipped 7 days ago. api-relay-audit has 904 stars, 83 forks, 26 open issues and last shipped 7 days ago. shannon leads on adoption by 5,538% (50,964 vs 904 stars). shannon is written in TypeScript under AGPL-3.0; api-relay-audit is written in Python under AGPL-3.0. shannon has attracted 12% as many forks as stars, api-relay-audit 9%. api-relay-audit 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
| shannon | api-relay-audit | |
|---|---|---|
| GitHub stars | ★ 51K | ★ 904 |
| License | AGPL-3.0 | AGPL-3.0 |
| Written in | TypeScript | Python |
| Last push | 2026-10-27 | 2026-10-27 |
| Forks | ⑂ 5.9K | ⑂ 83 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick shannon if
- You weight community size — 51K stars and counting
- You want the AGPL-3.0 license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick api-relay-audit if
- You want the api-relay-audit feature set and don't need the biggest community
- You prefer the AGPL-3.0 license terms
- Your stack matches Python
- You evaluated both and api-relay-audit fits your workflow better
About shannon
[!NOTE] Shannon 3.0 is live: deeper security code analysis, more thoroughly vetted findings, a rebuilt CLI, native CI/CD, professional PDF reports, and SARIF. Shannon is an autonomous, AI pentester for web applications and APIs. It analyzes your source code, identifies attack paths, and executes real exploits to prove vulnerabilities before they reach production. No exploit, no report. This repository is Shannon Open Source: the full agent, run locally from your command line. Launch Shannon The interactive launcher will guide you through setup and your first pentest. [!TIP] AI agents and LLMs: start with…
read the full shannon overview →
About api-relay-audit
API Relay Audit Local security audit for AI API relays and LLM proxies. DSH Plugin Your Agent Is Mine: what you can test locally Your Agent Is Mine documents malicious API relays injecting payloads and exfiltrating credentials. Anthropic's September 10, 2026 report describes fraudulent Claude resellers swapping models and harvesting credentials through their client tooling. In his September 11 disclosure, co author Chaofan Shou reports buying router data containing users' credentials. API Relay Audit is an independent, local security audit tool for AI API relays and LLM proxies, informed by the paper. The…
read the full api-relay-audit overview →
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Frequently asked questions
Is shannon or api-relay-audit more popular?
shannon has 50,964 GitHub stars and api-relay-audit has 904. shannon has the larger community by that measure.
Are shannon and api-relay-audit free?
Both are open source. shannon is licensed under AGPL-3.0 and api-relay-audit under AGPL-3.0. Neither carries a licence fee.
What is the difference between shannon and api-relay-audit?
shannon is written in TypeScript and api-relay-audit 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, shannon or api-relay-audit?
Choose shannon if you want the larger community (50,964 stars) or its AGPL-3.0 licence terms. Choose api-relay-audit if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.