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.

Screenshot of reactions and threads enabled with Stream’s messaging API
Example of rich messaging available via the chat API
Custom event app built using Stream’s chat service
Why stream chat?
Time to Market

Stream Chat provides an unmatched level of performance and UX that enables you to rapidly build in-app chat messaging.

Fully Customizable

Deliver a chat experience that won’t disappoint. Reactions, threads, URL enrichment, typing indicators, read state, etc give users what they expect from an in-app chat experience.

5m+ Concurrent Connections

No other Chat API can match our scalability. We support 5 million+ concurrent connections in a single channel without any issues.

Robust Security

Build the most secure and HIPAA, Soc2, GDPR ready chat messaging infrastructure. Privacy, security and reliability are our focus and promise.


Build your SaaS app with our chat infrastructure. Stream has full multi-tenancy support, enabling you to silo access to chat for your customers.

Easy Integration

Develop your chat application as you prefer with direct access to the API or through our powerful and feature-rich SDKs and components.

Try Stream Chat

Walk through four different example chat apps designed to showcase the flexibility of the 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 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 our 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, Stream Chat's performance 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 →

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

Developer Designed for Maximum Efficiency

Our chat API was designed by developers, for developers. Leverage the API or integrate our libraries and components. Save time with less maintenance so you can focus on your unique value.

Cloud Components

Ship a fully-featured, polished chat user experience today that takes other companies years to build in-house.

UI Kits

Our UI kits match our cloud components to give teams the chance to design and build the perfect experience.

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

Flexibility to implement reactions to messages just like you see with Slack, Facebook or iMessage.

Chat thread replies
Thread Replies

Improve the user experience by visually grouping chat messages within their replies.

Chat message showing url previews
URL Enrichment

Automatically show image, text and video previews of the URLs that users are sending.

User presence icon
User Presence

Show when a user was last active and if they are currently online. We also support user invisibility.

Flexible permissions
Flexible Permissions

Control what regular users, administrators, moderators or custom user roles are allowed to do.

Message input with slash commands integration
Slash Commands

Do more than compose a message with custom slash commands that integrate with APIs.

  • 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
  • Message states
  • Mute users
  • Custom slash commands
  • No defined participant limit
  • Typing indicators
  • Ban users
  • Highly available infrastructure
  • Fully customizable
  • Message history
  • Flag messages
  • SDKs & components
  • Unlimited message retention
  • Private channels
  • Custom messages
  • Giphy integration
  • Excellent performance & reliability
  • Public channels
  • Push notifications
  • URL enrichment
  • Enterprise SLA
  • CDN storage
  • Webhooks
  • Language translation
  • Phone support and SAML
Homeis logo

“Chat is working great for us - we have many features that we didn’t have using our old chat provider. Our audience grew by 1000% so we have seen a steep increase in chat usage with a stable chat solution.”

VP, Engineering profile picture

Ady Levy

VP, Engineering

Next Steps

Start your 30-Day Chat trial to try out all our Chat product has to offer. No commitment or credit card required. If you want a custom plan or have questions, we are eager to talk with you.

Activity Feeds

Build any kind of feed without the headache of scalability or reliability of your feeds.

Learn more →

99.999% Uptime SLA, Industry leading compliance and security best practices.

Learn more →