MessageBird might be a bit more popular than Nimbuzz. We know about 1 link to it since March 2021 and only 1 link to Nimbuzz. 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.
Just searched for it and it is still alive. And it is a Nepal based company. Source: almost 3 years ago
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
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Nexmo - Nexmo is a simple two way SMS API with global reach and wholesale rates