What is WebSocket?

How WebSocket Works

Unlike HTTP, where the client sends a request and waits for a response (request-response), WebSocket establishes a persistent connection between client and server. After the “handshake,” both sides can send data at any time without needing to reconnect. This enables data transmission with minimal latency — a critically important property for real-time applications.

Where WebSocket Is Used

WebSocket is indispensable in scenarios where data changes frequently and must be delivered to the user instantly: chats and messengers, trading terminals with streaming quotes, online games, collaborative document editing (like Google Docs), dashboards with real-time metrics, notification systems, and live tracking (for example, tracking a courier on a map).

WebSocket vs Alternatives

Server-Sent Events (SSE) — a simpler alternative for one-way data transmission from server to client. Long Polling — emulating real-time through repeated HTTP requests (an outdated approach). WebSocket is optimal when bidirectional communication with low latency is needed. For some scenarios (news feed updates, push notifications), SSE may be sufficient.

WebSocket in Webparadox Projects

We actively use WebSocket in FinTech projects (quote streams, trading terminals), chat systems, and real-time dashboards. On the backend, we use Laravel Reverb, Socket.io (Node.js), or native Go support. For scaling, we use Redis Pub/Sub to distribute messages across servers and ensure reliability under high loads.