Offline-First

A list of projects in the offline-first storage, sync & realtime collaboration/multiplayer space.

Databases

1. RxDB
2. WatermelonDB
3. Tuple
4. Datascript
5. Gun
6. TinyBase
7. SignalDB
8. Fireproof
9. Vlcn – ORM & P2P Syncing library to build offline-first apps.
10. Kikko – Reactive query layer on top of SQLite with support for web, desktop (Electron/Tauri) and mobile (React Native/Capacitor)

Frameworks

1. Evolu
2. Verdant
3. Liveblocks
4. Replicache
5. SyncedStore

CRDT Implementations

JavaScript

1. Tinymerge
2. Yjs
3. Automerge

Rust

1. CR SQlite - LWW register for SQLite
2. Diamond Types (Rust)
3. y-crdt - Rust port of Y.js
4. automerge-rs

Startups

1. InstantDB – Firebase alternative with a Graph-based client DB at the core
2. ElectricSQL
3. Homebase
4. Convex

Miscellaneous

1. Redux Offline – Persistence layer for Redux stores.
2. localForage

Resources

Writeups

1. Local-first software – You own your data, in spite of the cloud - Ink and Switch
2. Building a BFT JSON CRDT
3. Riffle - Building data-centric apps with a reactive relational database
4. Realtime editing of ordered sequences
5. How Figma’s multiplayer technology works
6. [An introduction to state-based CRDTs](

Videos

1. CRDTs for Mortals - James Long
2. Conflict-Free Replicated Data Types (CRDT) for Distributed JavaScript Apps.
3. A CRDT Primer: Defanging Order Theory - John Mumm
4. Building a collaborative text editor with WebRTC and CRDTs
5. ​Riffle - Reactive Relational State (Local-First Meetup Berlin #1) - Geoffrey Litt
6. CRDTs for Non Academics
7. Automerge: Making servers optional for real-time collaboration - Martin Kleppmann
8. Linear's realtime sync system - Tuomas Artman
9. Scaling the Linear Sync Engine
10. Metamuse Episode 56 - Sync

Podcasts

1. Localfirst.fm