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Supabase · Concept

Realtime

Supabase Realtime lets connected clients share live state over WebSockets. It supports Postgres database changes, Presence for shared user state, and Broadcast for custom messages.

Last updated

Syntax

supabase.channel(name).on(type, filter, callback).subscribe()

In-depth API docs are only for subscribers: parameters, examples, common mistakes and interview practice.

Subscribe
  • Broadcast
  • Presence
  • Postgres Changes
  • WebSockets
  • Phoenix Channels
  • Postgres logical replication
  • Row Level Security

Source: Realtime | Supabase Docs. Checked 2026-11-03.