F5, Inc.
| Company type | Public |
|---|---|
| Industry | Technology, Application Security, Network Protection |
| Founded | 1996 |
| Headquarters | Seattle, Washington , United States |
Area served | Worldwide (75 offices in 43 countries) |
Key people | François Locoh-Donou (President and CEO) |
| Products | Application delivery controller (BIG-IP), security software modules (LTM, AWAF, APM), cloud services (F5 Distributed Cloud Services) |
| Website | www |
F5, Inc. is a technology firm based in the United States that specializes in application security, multi-cloud orchestration, online fraud mitigation, application delivery networking (ADN), and network protection. Established in 1996, F5 initially concentrated on application delivery controller (ADC) solutions but has broadened its scope to include application layer automation, multi-cloud strategies, and security offerings aimed at countering increasing threats such as ransomware, data breaches, and distributed denial-of-service (DDoS) attacks.
The company’s headquarters are located in Seattle, Washington, within the F5 Tower. It maintains 75 offices spread across 43 countries, with significant centers in cities like New York City, London, San Francisco, and Boulder. These locations provide support for account management, product engineering, software development, manufacturing, and global service operations.
Although hardware products such as the BIG-IP iSeries appliances continue to be the main revenue contributors, F5 has expanded its portfolio by integrating software modules into its proprietary TMOS (Traffic Management Operating System). These modules include Local Traffic Manager (LTM), Advanced Web Application Firewall (AWAF), DNS services, and Access Policy Manager (APM). Collectively, they enable functionalities like load balancing, Layer 7 firewall protection, single sign-on capabilities with Azure AD and Okta, alongside enterprise VPN solutions. Furthermore, the BIG-IP platform is offered as a cloud-neutral virtual machine—the BIG-IP Virtual Edition—allowing deployment on-premises or within public and hybrid cloud infrastructures.
Corporate history
Founded in 1996 under the name "F5 Labs" and previously known as "F5 Networks, Inc.," the company now brands itself simply as "F5," a nod to the highest classification of tornado intensity on the Fujita scale.
In 1997, F5 introduced its inaugural product—the BIG-IP load balancer—which was engineered to redistribute traffic away from overloaded servers. The company went public in June 1999 with a listing on NASDAQ under the ticker symbol FFIV.
A significant leadership change occurred in 2017 when François Locoh-Donou took over as president and CEO from John McAdam. That same year saw the creation of "F5 Labs," a specialized unit dedicated to global threat intelligence and research in application security. Additionally, F5 announced its relocation from its long-standing waterfront headquarters to a new high-rise downtown Seattle office known as F5 Tower, which was completed in early 2019.
The company’s team includes distinguished professionals such as Dahl-Nygaard award recipient Gilad Bracha and former Google security leader Shuman Ghosemajumder. F5’s customer base encompasses 48 of the Fortune 50 companies, providing solutions across load balancing, Layer 7 application security, fraud prevention, and API management.
F5 BIG-IP
The BIG-IP product suite from F5 comprises hardware devices, modular software components, and virtual appliances powered by the F5 TMOS operating system. Clients have the flexibility to tailor their appliances by incorporating various BIG-IP modules.
Launched in 1997, BIG-IP remains the cornerstone of F5’s product lineup.
BIG-IP history
On September 7, 2004, F5 unveiled BIG-IP version 9.0 featuring the TMOS architecture. This release introduced several key improvements:
- Migration from BSD to Linux for system management tasks such as disk operations, logging processes, startup routines, and console access
- Deployment of the Traffic Management Microkernel (TMM), which communicates directly with network hardware to enhance network performance
These advancements form the foundation of F5’s strong position in application delivery and network security markets.
F5 NGINX
After acquiring NGINX, Inc. in 2019, F5 introduced an enterprise-level version of NGINX featuring enhanced capabilities, a variety of support SLAs, and frequent updates. This move broadened F5's offerings in the web server and application delivery sectors.
F5 Distributed Cloud Services
Unveiled at F5 Agility 2022, this cloud-based SaaS suite combines the functionalities of BIG-IP, Shape Security, and Volterra platforms. Its core service is web application and API protection (WAAP), allowing businesses to deploy, secure, and oversee applications across data centers, multiple cloud platforms, and edge networks. This aligns with F5’s strategic emphasis on cloud security and distributed app delivery.
uRoam, Inc.
In 2003, F5 expanded beyond its primary application delivery and security focus by purchasing uRoam, Inc. for $25 million in cash. This acquisition aimed to enter the emerging market for secure remote access to enterprise networks and applications.
MagniFire Websystems, Inc.
F5 ventured into web application security through its 2004 acquisition of MagniFire Websystems for $29 million. Although initially operated as a separate entity, MagniFire’s solutions were soon merged into the BIG-IP platform.
Swan Labs Corporation
In 2005, F5 acquired Swan Labs for $43 million to integrate WAN optimization and application acceleration features into the BIG-IP platform, thereby improving its load balancing performance.
Traffix Systems, Inc.
Also in 2005, F5 purchased Traffix Systems for $135 million. The acquired technology was incorporated into the BIG-IP Local Traffic Manager (LTM) product line to enhance traffic management capabilities.
Acopia Networks, Inc.
In August 2007, F5 acquired Acopia Networks for $210 million to introduce file-area networking functionality into the BIG-IP LTM module, further expanding its application delivery portfolio.
LineRate Systems, Inc.
F5 strengthened its software-defined networking (SDN) offerings within software-defined data centers by acquiring LineRate Systems in February 2013. This acquisition brought advanced layer 7+ networking technologies and engineering talent, reinforcing F5’s position in SDN solutions.
Defense.Net, Inc.
In May 2014, then known as F5 Networks, Inc., F5 acquired Defense.Net, a provider specializing in cloud-based DDoS mitigation services. The Defense.Net platform evolved into F5 Silverline; by December 2022, Silverline was phased out and incorporated into F5's Distributed Cloud Services suite to enhance managed security capabilities.
NGINX, Inc.
F5 significantly broadened its product range and market presence by acquiring NGINX, Inc., the creator of popular open-source web server software, for $670 million in March 2019. This strategic move reinforced F5's focus on open-source technologies and multi-cloud environments.
On January 18, 2022, Igor Sysoev—the original founder of NGINX and a key leader—left F5 to pursue personal endeavors. Following his departure, alternative open-source forks such as Angie and freenginx were developed independently of F5 and Sysoev. These initiatives highlight ongoing innovation and competitive shifts within the web server landscape.
Shape Security, Inc.
In January 2020, F5 completed the acquisition of Shape Security, a company specializing in AI-driven bot detection, for $1 billion. This strategic purchase augmented F5’s capabilities in fraud prevention and led to the introduction of an advanced fraud detection engine, thereby enhancing its suite of security products.
Volterra, Inc.
F5 acquired Volterra, an edge networking firm providing SaaS-based security solutions, in January 2021 for $500 million. By 2022, Volterra’s technologies were fully integrated into F5 Distributed Cloud Services, broadening F5’s portfolio in cloud security and edge computing.
Threat Stack, Inc.
In October 2021, F5 purchased Threat Stack, a cloud security startup headquartered in Boston, for $68 million. This acquisition strengthened F5’s cloud security offerings as Threat Stack’s solutions were incorporated into the F5 Distributed Cloud platform by late 2022, reinforcing the company’s position in securing cloud infrastructure.
Lilac Cloud, Inc.
F5 announced the acquisition of Lilac Cloud in January 2023. Based in Cupertino, Lilac Cloud delivers application services and acts as a CDN partner for F5’s Distributed Cloud Services. Its technology was integrated into F5’s Distributed Cloud product line to improve content delivery performance.
Suborbital Software Systems, Inc.
In July 2023, F5 acquired Suborbital Software Systems, a startup focused on cloud-native platforms utilizing WebAssembly technology. Although specific details were not disclosed due to Suborbital’s relatively small size, its innovations were incorporated into F5 Distributed Cloud Services to support expansion of the company’s cloud platform.
Wib Security, Inc.
During AppWorld in February 2024, F5 finalized the acquisition of Wib Security, an API security company based in Tel Aviv specializing in vulnerability identification and application observability. This addition enhanced the API security features within F5’s Distributed Cloud Services, aligning with the company’s strategic emphasis on application protection.
Heyhack
In March 2024, F5 acquired Heyhack ApS, a Denmark-based SaaS provider focused on automated penetration testing across multicloud environments. Heyhack’s technologies were integrated into the F5 Distributed Cloud Services platform to advance automated security reconnaissance and penetration testing capabilities.
LeakSignal
F5 acquired LeakSignal in March 2025, a cybersecurity firm dedicated to real-time data protection and governance for AI-driven applications. This acquisition enriched the F5 Application Delivery and Security Platform (ADSP) with AI-powered data classification, policy enforcement, and compliance monitoring functionalities—addressing vital data protection challenges within generative AI and multicloud sectors. LeakSignal’s innovations recognized by NIST further strengthen F5’s competitive edge in safeguarding complex data ecosystems.