Nexmo - Nexmo is a simple two way SMS API with global reach and wholesale rates
Onesheet CRM - The Simple CRM for Google Sheets
MessageBird - Reach 7 billion phones in seconds via SMS, Chat & Voice. Try it for free and improve your communication.
HubSpot - Grow Better With HubSpot: Software that's powerful, not overpowering. Seamlessly connect your data, teams, and customers on one CRM platform that grows with your business.
Plivo - Plivo simplifies your customer engagement.
Pipedrive - Sales pipeline software that gets you organized. Helps you focus on the right deals, so easy to use that salespeople just love it. Great for small teams.