Best Hermes Agent Alternatives

Autonomous coding agent from Block (Square) that works with any LLM through MCP-first extensibility. Apache 2.0 licensed with 47K+ GitHub stars and a Linux Foundation AAIF founding project. Designed for terminal-based workflows with deep tool integration, making it a strong open-source option for developers who want agent-assisted coding without vendor lock-in.

Open-source terminal-based AI coding agent built in Go by the SST team, with a rich TUI (Bubble Tea) supporting 75+ model providers including OpenAI, Anthropic, Gemini, Bedrock, Groq, and OpenRouter. Features vim-like editing, persistent SQLite sessions, and LSP integration for 40+ languages. Fully free with no vendor lock-in, it has rapidly grown to 95k+ GitHub stars.

Autohand is an AI platform for adaptive continuous engineering and autonomous code evolution, giving teams infrastructure to coordinate multiple AI agents inside sandboxed execution environments. Its open-source Commander tool builds command interfaces that orchestrate multi-agent workflows, while the broader platform lets agents iteratively write, test, and evolve code safely. Aimed at engineering teams pushing beyond simple code generation toward continuous AI-driven software improvement.