Add Real-time Features in Minutes, Not Days
The messaging backbone for collaborative apps. Drop-in SDKs for JS, Python, and Go with guaranteed delivery, built-in presence, and zero infrastructure to manage.
import { NoLag } from "@nolag/js-sdk";
// Connect to NoLag
const client = NoLag("your_access_token");
// Subscribe to a topic
client.subscribe("chat/general/messages", (message) => {
console.log("New message:", message.data);
});
// Publish a message
client.emit("chat/general/messages", {
user: "Alice",
text: "Hello everyone!"
});
// Set your presence
client.setPresence({
username: "Alice",
status: "online"
});
// Listen for presence changes
client.onPresence((event) => {
if (event.type === "join") {
console.log(`${event.data.username} joined`);
}
});How It Works
Connect your app to NoLag and start sending messages in real-time.
Browser / Mobile / Server
NoLag Cloud
Everything you need for real-time
Simple, reliable, fast, scalable. Complete presence, persistence, and permissions included.
WebSocket + MessagePack
Fast, efficient binary protocol. 30-50% smaller payloads than JSON for lower latency.
Built-in Presence
Know who's online with custom status data. Room-level and lobby-level presence tracking.
Delivery Guarantees
Fire-and-forget, at-least-once, or exactly-once delivery. Choose the right QoS for each message.
Retained Messages
New subscribers automatically receive the last message. Perfect for state synchronization.
Auto-Reconnection
Seamless recovery from network issues. Subscriptions restored automatically after disconnect.
Multi-language SDKs
JavaScript/TypeScript, Python, and Go SDKs are equally capable. Full feature parity across all.
Why Choose NoLag?
Ship real-time features without the infrastructure headaches.
Zero DevOps
No broker installation or infrastructure management
Optimized Latency
MessagePack + WebSocket = faster than JSON/HTTP
Built-in Presence
User awareness without separate systems
Multi-Language Parity
JS, Python, Go SDKs are equally capable
Load Balancing
Worker queue patterns out of the box
Dashboard Included
Visual management + analytics
Built for any real-time use case
From chat applications to IoT platforms, NoLag powers real-time experiences at scale.
Ready to build real-time?
Get started for free. No credit card required.