Realtime Messaging

Pub/Sub Messaging APIs

Build connected experiences with powerful hosted messaging APIs.

MQTT, WebSockets, Socket.io, long polling: all ways to send and receive data between any number of devices and users in realtime. Global, secure, and reliable, with delivery in under 100ms.

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Deliver Connected Experiences Quickly using PubNub’s Messaging APIs

Always-on Pub/Sub

Low latency messaging via persistent open connections to any device, and delivering messaging worldwide in 100ms.

Signals

Small, high-volume, low-cost messages for typing indicators, lat/long readings, and more.

Functions

Run JavaScript business logic directly inside PubNub, triggered by messages and user actions.

History

Retrieve past messages (like chat history) with a simple API for accessing historical data with EU/US-only storage options.

Unlimited Channels

Combine up to 10,000 individual channels into a single connection so user/device can subscribe to unique combination of message streams.

Channel Groups

Combine up to 10,000 individual channels into a single connection for more efficient, and better optimized, messaging.

Stream Filters

Filter channels based on message metadata, so each device receives only the messages they need.

MQTT Gateway

Connect existing MQTT-supported devices quickly and leverage the power of PubNub.

SOC 2 Type II and HIPAA Compliant

Build enterprise applications with confidence, meeting rigorous security and compliance requirements.

Powered by a SOC 2 compliant, secure, and scalable infrastructure

The PubNub Data Stream Network is a globally-scaled, battle-tested realtime IaaS, handling 1.3 trillion messages to 330 million devices monthly.

Reliable

Built-in resilience – message caching and catch up, redundancy, network failover – delivers realtime functionality with confidence.

Scalable

Multiple global points-of-presence guarantee message delivery no matter how many devices are connected.

Secure

Enterprise-grade security, including end-to-end AES-based encryption and mission-critical compliance, including SOC 2 Type II and HIPAA.

Realtime Messaging In Action Today

Private and Group Chat

Deliver chat messages, alerts, in-app chat, and chatbots for web, iOS, and Android chat.
Geolocation Streaming

Track live geo-coordinates and update an interactive map.
Smart Device Control and Monitoring

Trigger device action and monitor its state.