A Backend for Mobile Apps — Instant REST API, Auth & Storage
Mobile apps need a backend, but you don't want to run servers for every endpoint. Kolaybase exposes your PostgreSQL data over a secure REST API your app calls directly, with auth and file storage included.
Talk to your data directly
The SDK queries your database over REST with filtering, ordering, and related-table embedding — no custom endpoints to deploy per screen.
Built-in authentication
Sign users in with email or OAuth and scope their data with row-level security, so the client only ever sees what it should.
File storage with signed URLs
Upload avatars and media to S3-compatible storage and serve them with access-controlled URLs.
Offline-friendly REST
Standard HTTP and JSON make it easy to cache, retry, and sync from any mobile framework.
Fetch a user's data from the app
const { data } = await kb
.from("messages")
.select("id, body, sent_at")
.eq("conversation_id", conversationId)
.order("sent_at", { ascending: true });Frequently asked questions
- Does Kolaybase work with React Native and Flutter?
- Yes. The REST API is plain HTTP/JSON, so any mobile framework can call it. The kolaybase-js SDK works in JavaScript and TypeScript environments including React Native.
- How do I secure data accessed from a mobile client?
- Use authentication plus PostgreSQL row-level security. Policies run in the database, so even direct API calls only return rows the signed-in user is allowed to see.
More use cases
Start building today
A complete backend for your mobile apps — running in minutes.