httpSMS is a service that lets you use your Android phone as an SMS Gateway to send and receive SMS messages. You make a request to a simple HTTP API and it triggers your Android phone to send an SMS. SMS messages received on your android phone can also be forwarded to your webhook endpoint.
Twilio - Brings voice and messaging to your web and mobile applications.
MessageBird - Reach 7 billion phones in seconds via SMS, Chat & Voice. Try it for free and improve your communication.
Nexmo - Nexmo is a simple two way SMS API with global reach and wholesale rates
Sinch - Sinch is a powerful voice and messaging SDK that lets you bring your apps to life with VoIP and...
Signalmash - Signalmash fuels innovation by mashing VoIP, messaging (SMS/MMS), elastic SIP trunking and hosted PBX into one communications platform.
Infobip - A2P messaging platform for enterprises, resellers & mobile operators with global network coverage.