SendHub
Simple Business SMS. SMBs to Large Enterprise.
http://sendhub.com
SendHub makes business communication fast, simple, and effective. Our complete online business SMS messaging solution helps thousands of companies communicate more effectively with on-the-go workforces, customers, and more.
SendHub is a Y-Combinator graduate, and is backed by Menlo Ventures, Kapor Capital, 500 startups, the Seraph Group, Paul Buchheit, Eric Ries, Jawed Karim and Jeb Bush.