AWeber - AWeber is an Email marketing software that's easy to use. Send email newsletters & autoresponders and deliver top notch emails.
Twilio - Brings voice and messaging to your web and mobile applications.
Yodle - Yodle is a leading local online marketing company with 50,000+ local business customers.
Swift SMS Gateway - SMS Gateway is your bridge between the Internet and the world of cell phone SMS text messaging.
GatorMail - GatorMail is an email marketing platform from the communicator, founded in 2006 which features the ability to launch dynamic and mobile accessible email campaigns.
Maytapi - Serverless Whatsapp Api with Chat and Agent support.