SDK Library

SDKs

Lightweight SDKs for web, server, and mobile. Install in 2 minutes, auto-capture core events, and add custom tracking with one function call.

< 5 KB web SDK

Server-side support

Mobile SDKs

Start Free

Web SDK: track everything with one snippet

The JavaScript SDK is under 5 KB gzipped and auto-captures page views, sessions, UTM parameters, referral sources, and Web Vitals. Add custom events with sa.track().

Script tag or npm install, your choice
Auto page views, sessions, UTMs, and referrals
Web Vitals (LCP, FID, CLS) captured automatically
Custom events: sa.track("signup", { plan: "growth" })

Server SDK: secure backend tracking

Track server-side events like purchases, subscription changes, and API usage. Available for Node.js, Python, Ruby, and Go with batch support and automatic retries.

Node.js, Python, Ruby, and Go libraries
Batch event ingestion for high-throughput APIs
Automatic retries with exponential backoff
Secure API key authentication with scoped access

Mobile SDK: iOS, Android, React Native, Flutter

Track in-app events, screen views, and user sessions on mobile. Offline event caching ensures no data is lost when users go off-network.

React Native and Flutter SDKs for cross-platform apps
Native iOS (Swift) and Android (Kotlin) libraries
Automatic session tracking and device metadata
Offline event caching with sync on reconnect

Product overview All features Pricing plans Compare to GA4 & Mixpanel Documentation

Explore SDKs

Start free and connect your data in minutes. No credit card required.