Learn · every claim sourced
Understand CPaaS, step by step
Plain-language guides, use cases and research from the community, with a source for every claim. New here? Begin with the five short reads below.
The library
Sender registration around the world: who you have to tell before you text
Why countries regulate who may send business messages, what you usually have to register, and how the rules differ across the US, Canada, Europe, India, Brazil, the Gulf, Singapore and Nigeria.
10DLC registration without tears
US carriers now block unregistered business texts from ordinary ten-digit numbers. The process has two layers, takes longer than launch plans assume, and most rejections are avoidable.
Getting messages into the Gulf: sender IDs, licensed aggregators and the AD marker
Business messaging in the UAE and Saudi Arabia is a registration and licensing question before it is a technical one, and a global platform does not inherit local standing.
Telling people they are talking to a machine
Since 2 August 2026 this is a legal requirement in the EU, and similar rules exist elsewhere. It is also, independently, what makes automated support tolerable. One line, in the right place, does it.