Server-Sent Events (SSE) vs WebSockets: Real-Time with Laravel Reverb

When to use Server-Sent Events over WebSockets. A practical guide to implementing lightweight real-time updates using Laravel Reverb without the overhead of two-way communication.

Real-time web applications have traditionally relied on WebSockets for bi-directional communication. But what if you only need one-way updates from the server to the client? Enter Server-Sent Events (SSE).

WebSockets vs SSE

WebSockets

Bi-directional: Client and server can send messages to each other.

Protocol: Uses the ws:// or wss:// protocol.

Overhead: Requires a dedicated WebSocket server (like Laravel Reverb) and handles connection states.

Best for: Chat apps, multiplayer games, collaborative tools.

Server-Sent Events (SSE)

Uni-directional: Only the server can send messages to the client.

Protocol: Uses standard HTTP.

Overhead: Lightweight. No custom protocol or dedicated server required.

Best for: Live sports scores, stock tickers, notification feeds.

Laravel Reverb

Laravel Reverb is a first-party, scalable WebSocket server for Laravel applications. It makes WebSockets incredibly easy to set up. But if you only need SSE, you might not even need Reverb! You can use Laravel's native HTTP streaming responses.

However, if you want the robust broadcasting ecosystem of Laravel (channels, auth, presence), Reverb is the way to go.

Conclusion

Choose WebSockets (Reverb) when you need a conversation. Choose SSE when you just need to listen.