ClickSend - ClickSend builds communication software and tools for businesses. We offer SMS, MMS, Voice, Email, Online Mail and even Fax. All accessed via our Dashboard, app, flexible API or integrations.
Twilio - Brings voice and messaging to your web and mobile applications.
Textmagic - The all-in-one solution for all your business texting needs - marketing campaigns, two-way SMS chats, reminders, notifications, and internal staff communication.
MessageBird - Reach 7 billion phones in seconds via SMS, Chat & Voice. Try it for free and improve your communication.
engageSPARK - engageSPARK offers telephony and messaging engagement solutions.
Nexmo - Nexmo is a simple two way SMS API with global reach and wholesale rates