HomeServe

Twilio documentation is very good and as a platform it just works. It's robust and reliable. We road-tested plivo and it wasn't anywhere near in terms of docs or support. In fact their support was terrible at replying to us. 48 hours to answer basic questions.

That's said, were also using sendgrid by twilio and that's not been pleasant . Their email builder appears to be react based but written by a team who don't understand react very well. That's a nightmare as yet