Fat Agents is an independent project built by Alex Garcia. It's a small operation—just one person trying to make AI agents more accessible.
The goal is simple: let anyone have an AI assistant that works through email and Slack, without needing to set up infrastructure or write code.
Fat Agents is built on top of pi-mono, an open source AI agent framework created by Mario Zechner. Pi-mono provides the core agent runtime—the part that actually talks to Claude and handles tool execution.
We run a fork of pi-mono that adds some features specific to our hosting environment, but we try to stay close to upstream and contribute back when we can.
The agent brain: conversation handling, tool execution, memory management, and the coding assistant capabilities. It's the engine that makes the AI actually useful.
The hosting layer: email/Slack integration, user accounts, encrypted secret storage, container orchestration, and the dashboard. We handle the infrastructure so you don't have to.
The long-term goal is to make as much of this open source as possible. Right now:
The value we provide is in the managed hosting, not in keeping code secret. If you want to self-host, you should be able to.
Most AI assistants are thin wrappers around an API. Fat Agents are different—they have persistent memory, can use tools, run code, and maintain context across conversations. They're full agents, not just chatbots. Fat, not thin.
Also, fat cats are cool.
Questions, feedback, or just want to chat? Email [email protected].
Found a bug or have a feature request? We're all ears.