letsBrik - A Skype Alternative that is entirely web browser based.
Nexmo - Nexmo is a simple two way SMS API with global reach and wholesale rates
Amivox - Would you like to make international calls either free or at local rates ?
MessageBird - Reach 7 billion phones in seconds via SMS, Chat & Voice. Try it for free and improve your communication.
BNESIM - The all-in-one app for your communications. Voice, SMS, rooms, data SIM & eSIM in 200+ countries without roaming fees. Double data on the first top-up. Two years back-to-back winner of the "World Travel awards" for 2019 and 2020.
Plivo - Plivo simplifies your customer engagement.