Caudexus

cau·dex, noun · Latin

The trunk of a tree; the block of wood split into tablets and bound: the earliest form of the book.

The writer’s home.

Caudexus is one place to write, plan, and organize every kind of writing: a novel and its world, a screenplay, a memoir, a thesis, and the research behind them all. It works offline, it keeps your words on your device, it follows you to every device you own, and it stays as light or as deep as the work demands.


One place. A book and its research. A screenplay and its outline. A world and every story set inside it. Work that spans years deserves better than a folder of scattered documents, so Caudexus keeps the writing and everything that supports it together.

Yours. Your work lives on your device first, so it is there on the train, in the archive, and on a plane. Sign in on a second device and the two stay in step, with no save button and no conflict dialog. Turn on the vault and your text is encrypted before it leaves your device; the server never holds the key. Export everything, any time, in formats other tools can read.

Together, when you choose. Invite a co-author and write the same chapter at the same time, each cursor in view. Send a finished draft to beta readers, who highlight and comment in a reader of their own, with no password to manage. The project stays yours; the people you invite see only what you share.


Inspiration flows wherever you go. So does Caudexus.

Caudexus is in a private beta with a small group of working authors. Public sign-up opens soon.

Questions, or a case for an early seat: hello@caudexus.com