Quavern is a software studio in Bordeaux, France, building and running AI, developer tools, public-data systems and open-source software. It is a French single-shareholder company (SASU), founded by Jean-Baptiste Coulon--Chabagno.
Everything below is in service and can be opened today.
The services
Service | What it is | Where |
Marl | The Quavern AI assistant, in the browser | chat.quavern.ai |
Marl Code | Agentic coding in the terminal, for macOS, Linux, Windows and NetBSD | marl.quavern.ai/code |
Quavsit | Transit, shared bikes, charging points and road events, in one API | quavsit.quavern.com |
Quavern MCP | The Quavsit transit data as tools an AI agent can call | mcp.quavern.ai |
Quavblok | A multi-game Minecraft: Java Edition network | mc.quavern.net |
QuavernOS | A NetBSD-based operating system for amd64 and arm64 | quavern.com/quavernos |
myQuavern | One account for plans, consents and devices across every service | my.quavern.com |
One account across all of it
All of it runs on a single myQuavern account. You sign up once, and each service attaches its plan, its keys and its consent settings to that identity. Marl and Quavsit are billed separately, through the same payment processor, from the same account page.
What Quavern does not do
Marl never generates images, video or music, and never writes prompts for other generators. That is a published commitment, not a missing feature.
There is no telephone support. Support is by e-mail and by chat, read by one person.
Quavsit is not the official information service of any transport operator, and its data comes from what those operators publish.
Quavern help reference: what-is-quavern/en