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Twilio charges ~$0.0079 per SMS, I built something that makes it almost free and open-sourced it
Twilio charges around \~$0.0079 per SMS. If you send hundreds or thousands of messages (OTP, alerts, notifications), it becomes expensive very quickly. For many small projects, I felt Twilio was too much. So I built textbee - a simple way to turn any Android phone into your own SMS gateway. No Twilio or other providers, no per-message cost, just a phone + SIM card. How it works: Install the app on an Android phone, connect it, and it becomes an SMS server with an API. What you get: \- Send and receive SMS using REST API \- Use your own phone number \- Bulk messaging support \- Status tracking ( sent/delivered/failed) \- Webhooks for incoming messages \- Multi-device support (use multiple phones) \- Self-hostable and open source (MIT license) It is basically your own private SMS infrastructure. That old Android phone in your drawer? Install this, insert a SIM, and you can start sending messages from your app in a few minutes. Example use cases: \- OTP / 2FA \- Notifications and alerts \- Internal tools \- Low-cost SMS for startups For many small or medium use cases, this can be much cheaper than services like Twilio. Site: [https://textbee.dev](https://textbee.dev/) Source Code: [https://github.com/vernu/textbee](https://github.com/vernu/textbee)
Textbee is a clever developer utility that solves a clear pain point for hobbyists, but it is not a venture-scale business due to carrier restrictions on A2P (Application-to-Person) traffic via consumer SIM cards. The high likelihood of SIM blacklisting by telecom providers and the lack of a proprietary moat or scalable infrastructure make it a high-risk, low-moat investment.