Hello! We need to integrate an SMS gateway into our app for user phone verification. As we are just starting, we are searching for the most affordable/best price/performance option for SMS gateway to verify client phone numbers with the code, maybe you can suggest something between those two or maybe something else. We are planning to do business in Europe
Twilio is the leader. Strong API, excellent documentation and reliable service. I suggest Nexmo since their API has smaller learning curve, offering better prices and also reliable solution. Also Nexmo offers more call per sec. 3 vs 2 and 2, out of the box. Good luck
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