The 200+ countries is slightly misleading, especially when the title mentions two-way messaging. I've done a lot of research into messaging/SMS providers like Twilio, Nexmo, Plivo, etc for supporting two-way messaging in developing countries. Most providers currently only support two-way messaging in similar subset of countries in North America and Europe. Since it is powered by Twilio, I don't think it adds any new countries and definitely not 200.
https://support.twilio.com/hc/en-us/articles/223183068-Twili...