Barracuda Networks, Inc. is a company providing security, networking and storage products based on network appliances and cloud services. The company's security products include products for protection against email, web surfing, web hackers and instant messaging threats such as spam, spyware, trojans, and viruses. The company's networking and storage products include web filtering, load balancing, application delivery controllers, message archiving, NG firewalls, backup services and data protection.

Barracuda Networks was founded in 2003 by Dean Drako (founding CEO), Michael Perone, and Zach Levow; the company introduced the Barracuda Spam and Virus Firewall in the same year. In 2007 the company moved its headquarters to Campbell, California, and opened an office in Ann Arbor, Michigan.

In January 2006, it closed its first outside investment of $40 million from Sequoia Capital and Francisco Partners.

On January 29, 2008, Barracuda Networks was sued by Trend Micro over their use of the open source anti-virus software Clam AntiVirus, which Trend Micro claimed to be in violation of their patent on 'anti-virus detection on an SMTP or FTP gateway'. In addition to providing samples of prior art in an effort to render Trend Micro's patent invalid, in July 2008 Barracuda launched a countersuit against Trend Micro claiming Trend Micro violated several antivirus patents Barracuda Networks had acquired from IBM.

In December 2008, the company launched the BRBL (Barracuda Reputation Block List), its proprietary and dynamic list of known spam servers, for free and public use in blocking spam at the gateway. Soon after opening BRBL many IP addresses got blacklisted without apparent reason and without any technical explanation.

As of October 2009, Barracuda had over 85,000 customers. As of November, 2011, Barracuda had more than 130,000 customers. As of January, 2014, Barracuda has more than 150,000 customers worldwide.

In 2012, the company became a co-sponsor of the Garmin-Barracuda UCI ProTour cycling team and entitlement sponsor of the 2011 Indianapolis 500 champion Bryan Herta Autosport in the IZOD IndyCar Series, with the #98 Lotus driven by Alex Tagliani, who will defend the team's championship.

Barracuda Networks expanded its research and development facility in Ann Arbor to a 12,500 square foot office building on Depot Street in 2008. By 2012, the Michigan-based research division had grown to about 180 employees, again outgrowing its space. In June, 2012, Barracuda signed a lease to occupy the 45,000 square foot office complex previously used as the Borders headquarters on Maynard St in downtown Ann Arbor.

In July 2012, Dean Drako, Barracuda Networks’s co-founder, president and CEO since it was founded in 2003, resigned his operating position, remaining on the company’s board of directors. At the time of Drako’s departure, the company stated it had achieved profitability, a nearly ongoing 30 annual percent growth rate since inception, 150,000 customers worldwide, nearly 1,000 employees, 10 offices, and did business in 80 countries. The company created the office of the CEO as it started a CEO search.

In November 2012, long-time EMC executive William "BJ" Jenkins joined the company as President and CEO. Jenkins worked at EMC since 1998 and most recently served as president of EMC's Backup and Recovery Systems (BRS) Division.

In November 2013, Barracuda Networks went public on the New York Stock Exchange under the ticker symbol CUDA.

In March 2015, Barracuda Networks expanded its business to North Asia and was distributed by TriTech Distribution Limited in Hong Kong.

In November 2015, Barracuda added new Next Generation Firewall to its firewall family.

Barracuda has announced future discontinuation of its Copy and CudaDrive services as of May 2016.

In September 2007, Barracuda Networks acquired NetContinuum, a company providing application controllers to secure and manage enterprise web applications.

In November 2008, Barracuda Networks expanded into cloud-based backup services by acquiring BitLeap.

In November 2008, Barracuda Networks acquired 3SP, allowing the company to introduce Secure Sockets Layer (SSL) Virtual Private Network (VPN) products to allow secure remote access to network file shares, internal Web sites and remote control capabilities for desktops and servers.

In January 2009, Barracuda Networks acquired Yosemite Technologies to add software agents for incremental backups of applications such as Microsoft Exchange Server and SQL Server, and Windows system states.

September 2009, Barracuda Networks acquired controlling interest in phion AG, an Austria-based public company delivering enterprise-class firewalls.

In October 2009, 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 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.