Bulk Sms-sender — Github

| Feature | Small Business | Developer/API Integrator | Non-profit (Low Budget) | |---------|----------------|--------------------------|--------------------------| | | 1,000 - 50,000/month | 10,000 - 500,000/month | 500 - 10,000/month | | Recommended Repo Type | PHP/Laravel REST API | Python Flask with Twilio | GSM modem + pySerial | | Upfront Cost | $0 (self-hosted) | $0 (self-hosted) | $50 for modem + SIM | | Operational Cost | $0.007/SMS | $0.007/SMS | SIM plan (e.g., $20/1000 SMS) | | Setup Difficulty | Medium | Low (with Twilio) | High (requires AT command knowledge) | | Deliverability | 98%+ | 98%+ | 70-85% (carriers block bulk consumer SIMs) |

: While the GitHub code is usually free, the SMS provider will charge you per message (typically $0.01 to $0.03). bulk sms-sender github

Your App → Serial Connection (USB) → GSM Modem → Cellular Tower → Recipient | Feature | Small Business | Developer/API Integrator

Most open-source bulk SMS senders share a set of essential features designed to streamline mass communication: 000 - 50