Twilio
SMS, voice and WhatsApp APIs.
From $0.0083/SMSText and call notifications
Pay as you go; US long-code SMS from $0.0083 per message (plus carrier fees). Checked 2026-10-14.
Quick start
Buy a number, register for A2P 10DLC if texting US users, then send a test SMS.
Good and not so good
- Reliable global messaging
- Great docs
- US texting needs A2P 10DLC registration
Use cases with Twilio
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