Telnyx review

Telnyx is a programmable telecom platform running its own carrier network: SMS, MMS, voice, SIP trunking, IoT and, since 2025, RCS Business Messaging. It has no iMessage product and does not claim one. It appears in iMessage API searches purely because it is a messaging API vendor, and it is worth knowing where the line is — plenty of teams run Telnyx for SMS and voice and add a specialist vendor for the blue bubble on top.

What it is good at

• +Owns its network, which generally means better pricing and better deliverability control than a reseller.
• +RCS Business Messaging is generally available — the official rich-messaging path on Android and, differently, on iOS 18+.
• +Excellent, genuinely complete API documentation.
• +Sensible as the fallback layer beneath a specialist iMessage vendor.

Where it will bite you

• −**No iMessage capability whatsoever.** It cannot send a blue bubble and does not pretend to.
• −RCS on iPhone does not render as a blue person-to-person bubble — a point worth being clear about before you plan around it.
• −Telecom-shaped product surface; more configuration than a small business usually wants.

The shape of the API

Illustrative — parameter names and endpoints change. Treat this as the flavour of the integration, and copy the real thing from the official docs.

curl -X POST https://api.telnyx.com/v2/messages \
  -H "Authorization: Bearer $TELNYX_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "from": "+15551110000",
    "to": "+15551234567",
    "text": "Your appointment is confirmed: https://acme.co/a/91?utm_source=sms&utm_medium=sms&utm_campaign=confirm"
  }'
# This arrives as SMS or RCS. It will never be blue.

Tracking links with Telnyx

Whatever you send with, build the URL from one helper so tagging is consistent across every job and campaign. Open the UTM builder to generate one now.