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Sourcefire has raised $35.0M across 2 funding rounds.
Sourcefire has raised $35.0M in total across 2 funding rounds.
Sourcefire has raised $35.0M in total across 2 funding rounds.
Sourcefire's investors include Accel, CRV, Ann Winblad, Sierra Ventures.
Sourcefire was a cybersecurity company that developed commercial network security solutions based on the open-source Snort intrusion detection system (IDS). It built the Sourcefire 3D System, evolving into the Firepower line of products for real-time traffic analysis, protocol analysis, content matching, and threat detection including intrusions like buffer overflows and port scans[1][2][3]. Sourcefire served enterprises and large networks needing scalable IDS/IPS (intrusion prevention system) with performance, support, and real-time network awareness, solving problems of visibility into dynamic threats where traditional tools fell short[1][2][3]. The company achieved strong growth, securing early six-figure enterprise deals with clients like PwC and Intel, going public in 2007 (NASDAQ: FIRE), earning Gartner leadership recognition, and being acquired by Cisco for $2.7 billion in 2013[1][2][3][4].
Sourcefire was founded by Martin Roesch, creator of the open-source Snort IDS, initially in the living room of his Carroll County, Maryland home—accounts vary slightly on the exact year as 1998 or January 2001—with headquarters in Columbia, Maryland[1][2][3]. Roesch, who grew up in western New York and later lived in Ellicott City, Maryland, developed Snort as a free tool downloaded over 4 million times, then commercialized it to address enterprise needs for scalability and support that open-source alone couldn't provide[1][2][3]. A pivotal moment came in 2003 when, instead of following competitors into IPS, Sourcefire innovated "real-time network awareness"—a novel approach no one had seen—breaking out from the pack of security startups and reshaping industry conversations[2]. Early traction included large deals from day one and contributions to projects like ClamAV antivirus and Razorback, leading to an IPO, 41 patents, and global reach across 180 countries[3][4].
Sourcefire rode the early 2000s IDS/IPS wave, capitalizing on rising network threats like semantic URL attacks and stealth scans amid expanding internet use, where traditional security was "blind" to real-time changes[1][2][3]. Timing was ideal post-Snort's popularity, as enterprises demanded adaptive tools for dynamic IT amid cloud/mobility shifts; market forces favored its agile vision—seeing threats clearly, responding proactively—over rigid competitors[3][6]. It influenced the ecosystem by commercializing open source successfully, changing cybersecurity terminology, inspiring open initiatives like Cisco's OpenAppID and Snort 3.0 post-acquisition, and integrating into Cisco Firepower/FTD platforms used in ASA routers and new hardware series[1][4][6].
Post-2013 Cisco acquisition, Sourcefire's technology powers Firepower Threat Defense (FTD) and Talos intelligence, converging ASA with Snort for mature security operations against evolving threats like advanced malware[1][5][6]. Roesch advanced to Cisco's Chief Architect then VP, later founding Netography, signaling his ongoing influence in network security[4][5]. Looking ahead, its legacy shapes AI-cautious, open-source-driven defenses; trends like zero-trust and automated agility will amplify Cisco integrations, while Roesch-like innovators sustain momentum in a threat landscape demanding visibility first. This open-source pioneer proved startups can redefine security from a living room to billions.
Sourcefire has raised $35.0M across 2 funding rounds. Most recently, it raised $20.0M Series D in May 2006.
| Date | Round | Lead Investors | Other Investors |
|---|---|---|---|
| May 1, 2006 | $20.0M Series D | Accel, CRV, Ann Winblad, Sierra Ventures | |
| Jan 1, 2004 | $15.0M Series C | Accel, Ann Winblad, Sierra Ventures |
