№ — lending terms

Free to read. Licensed to resell.

Callimachus is open source under AGPL-3.0 — genuinely free for personal use, research, and open projects. A commercial license exists for the cases AGPL deliberately doesn't cover.

Open source

$0/ forever

AGPL-3.0-or-later

Every feature — desktop, CLI, editor extension, MCP server
All 11 agent sources, hybrid search, in-app chat
Local-first; your data never leaves your machine
Use, modify, and share under AGPL-3.0

Get the source

Commercial

Let's talk

For uses AGPL doesn't permit

Everything in the open-source edition
Use without AGPL's source-disclosure obligations
Ship inside closed-source software or a hosted service
Terms negotiated to fit your deployment

Email ari@shaller.dev

Not sure which you need? If you're using Callimachus yourself — even at work — the open-source edition is for you. The commercial license is only for redistributing it inside a closed product or service.