Company name: CellTrust
Where it's based: Scottsdale, Ariz.
When it was founded: 2006
Year it was a Fierce 15: 2008
Website: www.celltrust.com

Why it was a Fierce 15: CellTrust's SecureSMS product solved a big gap in the SMS delivery world by offering the company's clients--government agencies, banks and mobile marketing firms--a way to deliver encrypted SMS messages and obtain delivery reports. The company had a system that could encrypt SMS messages, send them through a secure gateway, and then de-encrypt them with a security key. Click here for more.

What has happened since it was awarded the Fierce 15: CellTrust remains focused on SMS security, and said that it is working with international governments, financial institutions and health care providers across three continents. The company also said it has a partnership with IBM, and offers its services on Windows Mobile and Android devices. Further, CellTrust Australia launched in June, and the company also plans an expansion into Africa.