Realtime Multiplayer Collaboration. Popularized by Google Docs, Figma, and Notion — realtime collaboration is awesome, but famously hard to build. Replicache provides a programming model that makes it much easier.

Bring Your Own Backend. Replicache is entirely client-side technology, and works with any standard web service backend. Your data stays on your servers.

Lag-Free UI. By executing all reads and writes against a local cache, apps built with Replicache respond instantly, without waiting for the server. It even works if the app is…

Offline. Replicache persists its cache to client-side storage, so apps boot and render instantly. Online, offline, or anything in between.

Transactional Conflict Resolution. Conflicts are a fact of life when syncing, but they don't have to be exceptionally painful. Replicache rewinds and replays your transactions during sync, sort of like git rebase for application state. It's the easiest way to deal with conflicts that is…

Correct. Replicache was designed in consultation with indepedent distributed systems expert Kyle Kingsbury of Jepsen. When properly integrated with your backend, Replicache provides Causal+ Consistency — one of the strongest consistency models possible in a synchronizing system. See the Replicache Design Document or Jepsen's summary for more information.