Realtime

Apps that feel alive.

Listen to Postgres table changes, send messages between clients and track user presence — over a single WebSocket connection.

Start a project Documentation

200 connections on FreeLow latency across Europesupabase-js compatibleWebSocket and HTTP

chat.ts

db.channel('room-1')
  .on('postgres_changes',
    { event: 'INSERT', schema: 'public', table: 'messages' },
    (payload) => addMessage(payload.new))
  .on('presence', { event: 'sync' }, () => updateOnlineUsers())
  .subscribe()

Capabilities

What you get with Realtime

Postgres Changes

Subscribe to INSERT, UPDATE and DELETE with filters, respecting RLS.

Broadcast

Low-latency messages between clients — cursors, chats, games.

Presence

Who's online? Synchronized user state per channel.

Channel authorization

Private channels controlled by policies in the database.

Dedicated instance

The Realtime server runs inside your project's stack — no noisy neighbours eating its resources.

Monitoring

Realtime traffic shows up in API reports and service logs in your project dashboard.

Use cases

What teams use it for

Chats and comments

New messages appear without a page refresh.

Collaboration

Co-editing, cursors and presence, Figma-style.

Live dashboards

Orders, metrics and alerts updated in real time.

The rest of the platform

Every service shares the same database, authentication and permissions.

Postgres databaseA dedicated Postgres 17 for every project: REST and GraphQL, table and SQL editors, backups with restore, reports and advisors.AuthenticationSign-up and sign-in, JWT sessions, MFA and Row Level Security — with user management in the dashboard. OAuth providers, magic links (once SMTP is configured), hooks and e-mail templates.StoragePublic and private buckets, signed URLs and RLS policies. Browse and upload files right from the dashboard.Edge FunctionsTypeScript/Deno functions deployed from the dashboard, API or MCP — with templates, secrets, an invocation tester, logs and metrics.Vectors & AIpgvector out of the box: embeddings, semantic search and RAG without a separate vector database.MCP serverConnect Claude, Cursor and other AI agents to your database through the Model Context Protocol.

Build in a weekend. Scale to millions.

Spin up a free project in 2 minutes. No credit card, no pausing after a week.

Start a project Talk to us