# Relayion

> Turn your Android devices into programmable SMS infrastructure.

Relayion is a REST API that uses Android phones with real SIM cards as SMS sending
devices. Flat monthly pricing, no per-message fees.

## Pages
- [How it works](https://relayion.com/#how-it-works)
- [API Documentation](https://relayion.com/docs)
- [Use Cases](https://relayion.com/use-cases)
- [Pricing](https://relayion.com/pricing)
- [Security](https://relayion.com/security)
- [FAQ](https://relayion.com/faq)

## Blog
- [Why SMS is the Right Channel for Conversational AI](https://relayion.com/blog/conversational-ai-sms)
- [How Relayion Fights SMS Abuse](https://relayion.com/blog/fighting-sms-abuse)
- [The Case for Owning Your SMS Infrastructure](https://relayion.com/blog/own-your-sms-infrastructure)
- [How to Set Up Your Android SMS Gateway with Relayion](https://relayion.com/blog/android-sms-gateway-setup)
- [SMS at Scale: Why Per-Message Pricing Stops Making Sense](https://relayion.com/blog/sms-pricing-at-scale)

## Use Cases
- [Clinic appointment reminders](https://relayion.com/use-cases/clinic-reminders)
- [AI agents that text humans](https://relayion.com/use-cases/ai-agents)
- [Order & shipping updates](https://relayion.com/use-cases/order-updates)
- [2FA codes & OTPs](https://relayion.com/use-cases/otp-verification)
- [Staff alerts & approvals](https://relayion.com/use-cases/staff-alerts)
- [Loyalty & promotions](https://relayion.com/use-cases/loyalty-promos)
- [Payment & transaction alerts](https://relayion.com/use-cases/payment-alerts)
- [School & parent notifications](https://relayion.com/use-cases/school-notifications)
- [Fleet & driver dispatch](https://relayion.com/use-cases/fleet-dispatch)
- [Booking confirmations](https://relayion.com/use-cases/booking-confirmations)