Barracuda Networks acquired Purewire Inc, a software as a service (SaaS) company offering cloud based web filtering and security. In April 2013, Barracuda Networks acquired SignNow. In 2014, Barracuda Networks purchased C2C Systems UK. In October 2015, Barracuda Networks acquired Intronis. In November 2017, Barracuda purchased Sonian In November 2017, Barracuda announced that it was being acquired by private equity investment firm Thoma Bravo, LLC. In January 2018, Barracuda acquired PhishLine. Controversies Security Issue In January 2013, a backdoor was discovered: "A variety of firewall, VPN, and spam filtering gear sold by Barracuda Networks contains undocumented backdoor accounts that allow people to remotely log in and access sensitive information, researchers with an Austrian security firm have warned." The backdoor was then secured shortly after the announcement. IP reputation and Emailreg.org On April 13, 2009, Emailreg.org published a notice clarifying that it is a whitelist of domains that had no impact on Barracuda Blog Lists. April 10, 2010 a blog entry appeared alleging that Barracuda Networks SPAM blocking deliberately targets non-spamming IP addresses and tries to get them to sign up for an email whitelisting service "emailreg.org". In 2019 Emailreg.org announced that it was no longer accepting new customers but would continue services for existing customers until further notice. Emailreg.org discontinued services shortly thereafter and is no longer in operation. As of May 2, 2020 the same warning appears for some IP addresses. See also Comparison of file hosting services Comparison of file synchronization software Comparison of online backup services References External links American companies established in 2003 Companies based in Campbell, California Networking companies of the United States Networking hardware companies Networking software companies Computer security software companies Telecommunications equipment vendors Service-oriented (business computing) Computer security companies Firewall software Spam filtering Anti-spam Email Content-control software Backup software Deep packet inspection Companies formerly listed on the New York Stock Exchange One-click hosting Private equity portfolio companies Kohlberg Kravis Roberts companies Software companies established in 2003 2003 establishments in California 2013 initial public offerings 2018 mergers and acquisitions 2022 mergers and acquisitions