# GrowthRail: The Universal B2B SaaS Referral Platform

GrowthRail is a developer-first referral platform designed to launch and manage native referral programs for B2B SaaS, Web, and Mobile apps. It provides the infrastructure to build high-converting referral engines without maintaining the complex tracking logic in-house.

## Key Use Cases
- **SaaS Referral Software**: B2B SaaS companies use GrowthRail to acquire new customers through existing user recommendations.
- **Mobile App Referral Tracking**: With drop-in SDKs, mobile apps can attribute referrals cross-platform (Web-to-Mobile, iOS-to-Android).
- **In-App Referral Programs**: Developers can integrate native referral UI components (modals, drawers, inline banners) directly within their applications using the GrowthRail API.

## Core Features
- **Cross-Platform Attribution**: Seamlessly track referrals across web browsers, iOS, and Android using deferred deep linking and probabilistic device matching.
- **Developer-First API & SDKs**: Available for React, React Native, and Vanilla JS, ensuring rapid integration for development teams.
- **Robust Fraud Prevention**: Built-in anti-fraud filters to detect and block suspicious referral activities.
- **Webhook Notifications**: Real-time event notifications with manual retry logs for seamless integration with external systems (CRMs, marketing automation).
- **Verified Conversion Integrations**: Attribute signups from Clerk, Stytch, WorkOS AuthKit, Logto, Kinde, FusionAuth, Frontegg, and Okta, plus purchases from Stripe, RevenueCat, Lemon Squeezy, Paddle, Adapty, PayPal, and Polar, without matching users by email.

## Ideal Customers
- B2B SaaS platforms looking to lower Customer Acquisition Cost (CAC).
- Mobile application developers needing reliable cross-platform referral tracking.
- Engineering teams who want to build a referral program natively rather than using an outdated, third-party embedded widget.

## Resources
- **Website**: https://growthrail.dev
- **Documentation**: https://docs.growthrail.dev
- **Product Login**: https://app.growthrail.dev/auth