Design + Build
Any Chat Use Case

The #1 Chat API for Custom Messaging Apps.

Build real-time chat messaging in less time. Rapidly ship in-app messaging with our highly reliable chat infrastructure and feature-rich SDKs. Improve your overall in-app conversion, engagement, and retention.

Why stream chat?
Time to Market
Fully Customizable
5m+ Concurrent Connections
Robust Security
Easy Integration
Examples of the best chat API in action!

Try Stream Chat

Walk through four different example chat apps designed to showcase the flexibility of the best messaging API.


Social In-App Messaging Connects Your Users

Increase real-time engagement in your web or mobile app with the Stream Chat API powering your social messaging services. Effortlessly integrate messaging and connect your users worldwide.

  • Multi-tenant ready
  • Built-in Giphy & Imgur support
  • Emoticons & reactions
  • Direct & group chats
  • Link previews
  • Edit & delete messages
Social In-App Messaging chat

Bring Individuals and Teams Together for Collaboration

Improve community engagement or replace email for your team with Stream's in-app messaging API service. Our components and APIs allow you to build anything from a simple team chat app to a Slack alternative.

  • Slash commands
  • Unlimited users per Channel
  • Moderation
  • Channel Permissions
  • Custom business logic
  • Data is safe & secure
Team collaboration chat app

Reliable Live Chat Platform that Drives Customer Engagement

Our Livestream chat service allows you to capture and retain active audience engagement on your web or mobile platform by enabling your users to interact via real-time messaging.

  • Emoticons and gifs
  • Connect millions of users
  • AI-based AutoMod
  • No channel Limits
  • Flexible permission system
  • Fully customizable
Livestream chat application

Build an Unprecedented Experience With Our White-Label Chat Solution

Our chat service includes direct access to the best chat API, accompanied by powerful and feature-rich SDKs for your language or framework. We are HIPAA ready, SOC 2 and ISO 27001 certified.

Custom gaming in-app chat application built with Stream's chat service

Chat EDGE Network

Unlike traditional cloud infrastructure, the performance of the Stream Chat platform doesn’t rely on users' proximity to a regional data center. That means latencies up to 5 times lower and fewer errors caused by poor WiFi or mobile connectivity. Read more about Chat EDGE Network

  • Low latency
  • e2e Encryption via TLS
  • BGP + DNS routing
  • 99.999% uptime

Developer Designed for Maximum Efficiency

We created our chat API with developer priorities in mind from the start. Integrate quickly with your desired combination of low-level API access and pre-built Stream libraries and components.

Cloud Components

Our components were developed to enable teams to quickly ship a full-featured, high fidelity, in-app chat experience in days that would typically take years to build in-house.

UI Kits

Our free UI kits and design systems were created to match our cloud components and provide teams with the ability to build the best messaging UX within their app.

Chat Messaging UI Kit
Free Downloads

Key Features Users Need

Ship in-app chat messaging with all the features your users expect. Want to learn more about us? Contact Sales Now→

Message reactions preview
Message Reactions
Chat thread replies
Thread Replies
Chat message showing url previews
URL Enrichment
User presence icon
User Presence
Flexible permissions
Flexible Permissions
Message input with slash commands integration
Slash Commands
  • Reactions
  • Image moderation
  • AI moderation
  • Multi-tenant
  • Silent messages
  • Spam & profanity protection
  • Unread messages counts
  • Media attachments & resizing
  • Threaded conversations
  • User roles
  • Multi-region support
  • Fast response-times(avg 5ms)
  • Presence/who is online
  • @mentions
  • Security & legal compliance
  • Dedicated stack is available
  • Read receipts
  • Mute users
  • Custom slash commands
  • No defined participant limit