Y-Octo is a high-performance CRDT implementation compatible with yjs.

Y-Octo is a tiny, ultra-fast CRDT collaboration library built for all major platforms. Developers can use Y-Octo as the Single source of truth for their application state, naturally turning the application into a local-first collaborative app.

Y-Octo also has interoperability and binary compatibility with yjs. Developers can use yjs to develop local-first web applications and collaborate with Y-Octo in native apps alongside web apps.

AFFiNE is using y-octo in production. There are Electron app and Node.js server using y-octo in production.

Mysc is using y-octo in the Rust server, and the iOS/Android client via the Swift/Kotlin bindings (Official bindings coming soon).

• ✅ Collaborative Text
  • ✅ Read and write styled Unicode compatible data.
  • 🚧 Add, modify and delete text styles.
  • 🚧 Embedded JS data types and collaborative types.
  • ✅ Collaborative types of thread-safe.
• Collaborative Array
  • ✅ Add, modify, and delete basic JS data types.
  • ✅ Recursively add, modify, and delete collaborative types.
  • ✅ Collaborative types of thread-safe.
  • 🚧 Recursive event subscription
• Collaborative Map
  • ✅ Add, modify, and delete basic JS data types.
  • ✅ Recursively add, modify, and delete collaborative types.
  • ✅ Collaborative types of thread-safe.
  • 🚧 Recursive event subscription
• 🚧 Collaborative Xml (Fragment / Element)
• ✅ Collaborative Doc Container
  • ✅ YATA CRDT state apply/diff compatible with yjs
  • ✅ State sync of thread-safe.
  • ✅ Store all collaborative types and JS data types
  • ✅ Update event subscription.
  • 🚧 Sub Document.
• ✅ Yjs binary encoding
  • ✅ Awareness encoding.
  • ✅ Primitive type encoding.
  • ✅ Sync Protocol encoding.
  • ✅ Yjs update v1 encoding.
  • 🚧 Yjs update v2 encoding.

Put everything to the test! We've established various test suites, but we're continually striving to enhance our coverage：

• Rust Tests
  • Unit tests
  • Loom multi-threading tests
  • Miri undefined behavior tests
  • Address Sanitizer memory error detections
  • Fuzzing fuzzing tests
• Node Tests
• Smoke Tests
• Eslint, Clippy

• OctoBase: The open-source embedded database based on Y-Octo.
• yjs: Shared data types for building collaborative software in web.

• DarkSky
• liuyi
• LongYinan

See Why we're not using yrs

Y-Octo are MIT licensed.