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OpenClaw is the category-defining self-hosted assistant: one Gateway on your own hardware connects ~29 chat channels (WhatsApp, Telegram, Signal, iMessage, Slack, Discord…) to an agent with memory, skills, sessions, and multi-agent routing — stewarded by an independent 501(c)(3).

Hermes Agent is Nous Research's self-improving assistant — a closed learning loop creates skills from experience and refines them in use, with agent-curated memory, periodic nudges, FTS5 session search, and Honcho user modeling. Runs from a $5 VPS to serverless backends.

NanoClaw is a TypeScript OpenClaw fork built for isolation — each agent runs in its own container, with Agent Swarms for multi-agent collaboration — the security-first direct replacement for the original gateway.

ZeroClaw is a Rust rewrite of the personal-agent shape — a single binary under ~5MB RAM that talks to ~20 model providers and 30+ channels, with supervised-by-default autonomy, OS-level sandboxes, signed tool receipts, and GPIO/I2C/SPI for real hardware.

PicoClaw is Sipeed's Go rewrite for embedded — one binary that cold-starts in under a second inside ~10MB of RAM on single-board computers; roughly 95% of its core was written by an AI agent.