AppRiver, LLC is a technology company based in Gulf Breeze, Florida, founded in April 2002. It specializes in cloud-based cybersecurity and information technology services, focusing on secure messaging solutions for businesses of all sizes, particularly in email security. The company has experienced rapid growth and is recognized as one of the fastest-growing privately owned tech firms in the U.S. In 2019, AppRiver was acquired by Zix Corporation, which was later acquired by OpenText in 2021. AppRiver offers a range of cloud security services, including advanced email security, email encryption, spam and virus protection, Microsoft Exchange hosting, web protection, secure email archiving, and tools for monitoring email traffic. The company serves over 30,000 small to medium-sized businesses globally, managing more than 5 million mailboxes. Known for its customer-centric approach branded as "Phenomenal Care," AppRiver emphasizes high-quality support and aims to simplify complex cybersecurity challenges for its users.