WHAT IS IT?
An Android app that turns any old smartphone into an API-driven SMS gateway. You send an HTTP request, the phone sends the SMS through its SIM card. Incoming messages are pushed back in real time via webhooks. No registration, no middleman.
WHY IS IT INTERESTING?
- No provider lock-in: use your own mobile plan instead of paying Twilio, Vonage or similar per-SMS pricing.
- Three deployment modes: local server (LAN/VPN), private cloud server (self-hostable), or public cloud hosted by the maintainers.
- End-to-end encryption: message content and phone numbers encrypted client-side before transit.
- Native webhooks: real-time delivery of incoming SMS, delivery status updates, MMS notifications.
- Multi-SIM and multi-device: orchestrate several phones, pick which SIM sends which message, handle multipart messages.
USE CASES
- Two-factor authentication (2FA) over SMS without paying a third-party service
- Transactional notifications for an early-stage SaaS that wants to control costs
- Appointment reminders for clinics, garages, hair salons or any small business
- SMS-based feedback collection or surveys in markets where SMS still dominates
- Putting an old Android device stuck in a drawer back to productive use