Alternatives to Harden

Tools that do the most similar job to Harden, closest first.

• keel — AI coding agents that prove their work
• Kit by Speakeasy — Your coding agent runtime. Claude but fast, cheap, concise.
• Koreshield — Security and evidence for AI support agents
• plandex — Open source AI coding agent. Designed for large projects and real world tasks.
• GenCode — A coding agent inside the Genspark Super App
• Relay — A harness for AI coding agents that recover and verify
• Codewhale — Open-source coding agent for your terminal, built in Rust and on a journey of continuous community…
• ECC — The agent harness performance optimization system. Skills, instincts, memory, security, and research-first…
• NOAN — The fact layer for your AI agents
• Canary (YC) — Independent verification for AI code
• Fez — AI agents that work as a team and make decisions together
• Superset Mobile — Your coding agents, now in your pocket

Opening Liz…