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.

Your Application

Browser / Mobile / Server

NoLag SDK

NoLag Cloud

Message Routing
Presence Tracking
Delivery Guarantees
Other Connected Clients

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

Ready to build real-time?

Get started for free. No credit card required.