Vellum

A document editor that doesn't need the internet.

Every keystroke is saved locally first and synced in the background. Write on a plane, land, and watch your work merge with your team's — without losing a single character.

Local-first

The editor never waits for a server. IndexedDB is the source of truth; the network is an optimisation.

Conflict-free

A sequence CRDT merges concurrent edits deterministically. No last-write-wins, so nobody's paragraph disappears.

Immutable history

Restoring a version appends new operations rather than rewriting the past. History is append-only, enforced by the database.