Based on our record, MessageBird seems to be more popular. It has been mentiond 1 time since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
We built a subscription management chatbot, using Twilio for sending SMS, but it lacked a dashboard to view conversations. I've recently come across https://messagebird.com/en/ - they have a pre-built dashboard that allows your team to respond to messages, as well as a nifty flow builder. Source: almost 3 years ago
Twilio - Brings voice and messaging to your web and mobile applications.
Asterisk - An open source telephony switching and private branch exchange service for Linux.
Plivo - Plivo simplifies your customer engagement.
FreeSWITCH - FreeSWITCH is an open-source media application designed to support popular protools such as SIP and WebRTC and provides a platform to develop voice and video applications.
Nexmo - Nexmo is a simple two way SMS API with global reach and wholesale rates
FusionPBX - FusionPBX is an open source FreeSWITCH GUI.