A Rust agent runtime you host yourself

Zophos runs an AI agent on your machines, between the model you choose and your ordering, POS and ERP systems, and logs every step it takes. We build agents on it for one job your staff do every day.

Build an agent with us See how it's built

Why we build on Zophos

It's the runtime we wrote, and we open it up below.

Rust, end to end

One compiled binary, typed messages between the model and the tools, no interpreter to install beside it.

Runs on your machines

Your data and API keys stay with you, not on our servers.

Fitted to your systems

Tools are MCP servers or Rust code, written for your ordering, POS or ERP systems. None comes built in.

Every step on record

Every request, tool call and result goes into a log that is only ever added to. Limits are built in, and any task can be stopped.

One loop between the model and your systems

The model asks for tools. Zophos runs each call against your systems, feeds the result back and logs the round, until the model asks for nothing more. The tools are fitted to each business, as MCP servers or tools written in Rust.

See how it's built

Zophos, opened up: every part and every design decision, for you or your engineers to check.

3D World

Every part of the runtime, placed by how close it sits to the core loop.

2D Map

The same parts as a flat map, grouped into zones.

Engineering notes

32 notes on how and why it's built, mistakes included. In Chinese.

Questions

What it is, and where the limits are.

Can we buy Zophos?: No. It's the runtime we build client agents on, and the beta below is a demo. Pilots, pricing and project work are on jacklibra.dev.
Where does our data go?: It stays on your machines, except what the agent sends to the model provider you chose, to answer each request. Running fully offline on a local model isn't supported yet.
Which models can it use?: Models from Anthropic, OpenAI and Gemini. An agent can switch provider and keep its history.

Try the beta

For engineers, a demo build: the runtime as a terminal coding agent. One command on Debian or Ubuntu, amd64.

Debian or Ubuntu · amd64

curl -fsSL https://apt.jacklibra.dev/install.sh | sudo bash

Beta: breaking changes may occur. Not sandboxed: tools such as bash run without asking first, so run it in an isolated environment with only the access it needs.

Build an agent on Zophos

We design, build and deploy agents for your systems.

Work with us Pilots from US$2,000 · See pricing →

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