Which countries require consent before the first message?

25 countries Bird reaches by SMS record a consent requirement in their policy; the other 220 record no consent model at all, which is missing data rather than an absence of local law, so check the regulator before you send.

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Opt-in required (25)

The recipient agrees before the first message.

The rest of the SMS platform

One API, one set of keys. Explore the other capabilities.

All destinationsCoverage, sender types, and rules for every country Bird reaches.Sender-ID registrationPre-register alphanumeric and dedicated senders where countries require it.Two-wayInbound SMS and conversational replies as HMAC-signed webhooks.RoutingDestination controls, carrier connectivity and reported routing outcomes.

Capture verifiable opt-in before sending your first text.

Carriers and telecom regulators require proof of subscriber permission before you send promotional broadcasts or recurring notifications. Store each contact's opt-in status in Bird, honor STOP and unsubscribe replies automatically on two-way numbers, and include clear opt-out instructions in every marketing campaign so opted-out recipients are skipped before a message is billed.