The backend for AI chat apps
Sessions, memory, context, streaming. One SDK. Focus on your product, not infrastructure.
// Initialize ChatStack in React
import { ChatStack } from '@chatstack/sdk'
const chat = new ChatStack({
apiKey: process.env.CHATSTACK_KEY,
memory: 'persistent',
})
// Create a session with context
const session = await chat.session.create({
userId: 'user_123',
context: 'premium-support',
})
// Stream a response
const stream = session.stream('Hello!')
The complete infrastructure for AI chat.
Simple for developers. Ready for production scale.
Sessions
Persistent chat sessions with built-in message history and automatic state management.
Memory
Vector-based long-term memory across conversations. Auto embeddings included.
Context
Smart context windows that manage token limits and priorities automatically.
Streaming
First-class streaming with backpressure handling and graceful error recovery.
Multi-platform
SDKs for React, React Native, Flutter, and Kotlin. One API everywhere.
Token Counting
Track token usage per session, user, or API key in real time. Full analytics built in.
Rate Limiting
Per-user and per-key rate limits with sliding windows. Abuse protection out of the box.
Billing & Tiers
Manage free, pro, and enterprise tiers. Metered billing with usage caps and overage handling.
Up and running in minutes
Three steps. No infrastructure to manage.
Install the SDK
Add ChatStack to your project with a single package install. Works with any framework.
npm install @chatstack/sdkInitialize & connect
Configure your API key and set your memory and streaming preferences. One config, you're ready.
const chat = new ChatStack({ apiKey })Ship your product
Create sessions, stream responses, and let ChatStack handle the infrastructure. Focus on your UX.
const stream = session.stream(message)Start building today
Join the waitlist for early access. Be the first to ship AI chat apps with zero infrastructure headaches.
Free during early access. No credit card required.