Afilnet is one of the best SMS provider in the market, we have been working with this company for the last 10 years, and we're really happy with the service and support given.
Smarty - Smarty provides address validation, autocomplete, geocoding and reverse geocoding services covering addresses in over 240+ countries.
Pony Express HQ - Pony Express HQ is an SMS text message marketing for small businesses, real estates, clubs, communities, dispensaries or non-profits. Send and receive text messages and images online with the large group of customers. Group texting app no reply all.
Loqate - The Standard in Global Address Verification
Releans - Communication platform for Messaging and Chatbots
Addressy - Addressy is address verification software that captures and verifies addresses on websites.
Twilio - Brings voice and messaging to your web and mobile applications.