Home / Architecture Explorer / WhatsApp architecture WhatsApp architecture On the roadmap: Interview Ready · step 3: Feeds, chat and notifications
Millions of persistent connections per server. 8 components, 2 request walk-throughs.
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All components
Phones Edge / load balancer Chat servers (Erlang) Presence / routing Offline message store Media storage CDN Push gateway
A simplified model based on public talks and engineering write-ups. Real systems are larger and change over time.