Birdeye - #1 most trusted reputation and customer experience platform for local business
Twilio - Brings voice and messaging to your web and mobile applications.
ReviewTrackers - Software that generates new customer reviews, engages your customers and lets you listen and...
Clockwork SMS - Clockwork is an Easy Text Message API. An SMS API for Developers. Build powerful apps and include SMS. Signup is free, Try it now.
Reputation.com - Reputation.com is a solution for tracking and improving online reviews, social media, and local search visibility for businesses.
Nexmo - Nexmo is a simple two way SMS API with global reach and wholesale rates