There can be more than Notion and Miro. AFFiNE(pronounced [ə‘fain]) is a next-gen knowledge base that brings planning, sorting and creating all together. Privacy first, open-source, customizable and ready to use.

The local-first database that runs on every JS runtime and replicates with your existing backend - no vendor, no lock-in - https://rxdb.info/

Shared data types for building collaborative software

An open source cybersecurity protocol for syncing decentralized graph data.

A JSON-like data structure (a CRDT) that can be modified concurrently by different users, and merged again automatically.

The agent platform built on sync.

Berty is a secure peer-to-peer messaging app that works with or without internet access, cellular data or trust in the network

Peer-to-Peer Databases for the Decentralized Web

Broadcast, Presence, and Postgres Changes via WebSockets

Make your JSON data collaborative and version-controlled with CRDTs

🧩 Content editing tech stack for the web - BlockSuite is a toolkit for building editors and collaborative applications.

A reactive data store & sync engine.

Open-source and local-first Slack and Notion alternative that puts you in control of your data

Library for building distributed, real-time collaborative web applications

Realtime infrastructure for multiplayer apps and agents

Convergent, Replicated SQLite. Multi-writer and CRDT support for SQLite

A full-stack, syncing database that runs on both server and client. Pluggable storage (indexeddb, sqlite, durable objects), syncs over websockets, and works with your favorite framework (React, Solid, Vue, Svelte).

The Yjs CRDT WebSocket backend for conflict-free real-time collaboration in your app.

A new kind of database that's distributed across your frontend, containers, serverless functions and its own storage cloud.

Rust port of Yjs