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.

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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

The Stream Chat platform 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.

Multi-Tenancy

Build your SaaS app with our chat framework. 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.

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.

Try Demos

API Tour

components

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 Demo Talk to sales

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

Virtual Event Demo Talk to sales

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.

HIPAA telemedicine chat
Live chat for marketplaces
Livestream chat for virtual events
Collaborative education chat
Interactive gaming chat

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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.

Chat SDKs

API Tour

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

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

Thread Replies

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

URL Enrichment

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

User Presence

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

Flexible Permissions

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

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

“Stream Chat was the right choice for Hopin because it just works so seamlessly. We can focus on the things that we care most about, and we can rely on the Stream team to support us for the rest. We can work on feature development and not have to worry about chat scale, performance, and reliability.”

Mel Mete

Senior Product Manager, Hopin

Design + Build
Any Chat Use Case