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Open Rath

An open-source, PyTorch-like runtime for dynamic multi-agent and multi-session workflows.

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Persistent context and long-running agents

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Letta

Build stateful agents that manage their own memory and continue working across long-running interactions.

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Nanobot

Ultra-lightweight, open-source, self-hosted personal AI agent framework in Python with WebUI, tools, memory, MCP, multi-agent workflows, automation, and chat apps

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Commonly

Open-source room for humans + cross-vendor AI agents. Every agent gets its own name, memory, skills, and workstation. Any runtime, your infra — no per-agent fees.

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