ThreatLocker is an American cybersecurity company that develops zero trust cybersecurity tools for endpoints and networks, including software as a service products. History
ThreatLocker was founded in 2017 by Danny and Sami Jenkins and John Carolan. It initially described its products as providing application whitelisting. It expanded into Europe in 2021. That year, the company said it had raised $20 million for expanding its global footprint and product research and development. By 2022, it had raised a total of $100 million. It provided server and endpoint security for 23,000 organizations. ThreatLocker was one of Orlando Business Journals 2022 Fire Awards honorees and recipient of a 2022 Fire Awards Blazers. It acquired Third Wall that year, a company that made an automated security plug-in that locks down Windows.
In November 2023, ThreatLocker hired Apple security consultant Slava Konstantinov as chief architect of Mac security and development. That year, it opened its Dublin headquarters with approximately 120 positions and acquired the assets of Arlington, Virginia-based software firm HyperQube Technologies. The company named HyperQube chief executive officer Craig Stevenson as director of ThreatLocker Ops. A Series D funding round raised $115 million in 2024. Danny Jenkins said in 2025 that the company was planning an initial public offering within two to three years. ThreatLocker added zero trust network and cloud access products in 2026. This followed the establishment of 14 data centers, 12 of which are based in the United States. It announced $190 million in Series F funding in July 2026.
Operations Co-founders Danny and Sami Jenkins are the company's chief executive officer and chief operating officer, respectively. ThreatLocker is based in Orlando, Florida, has European headquarters in Blanchardstown, Dublin, and has offices in the United Arab Emirates and Australia. Its Florida location employs approximately 600 people and there are an additional 100 outside the area, as of 2025. Danny Jenkins said in 2025 that the company had $100 million in revenue, and that revenue had increased 3,000% over a three-year period. It served approximately 50,000 companies as of 2025. Investors include Boston, Massachusetts-based company Elephant VC and Minneapolis, Minnesota-based company Arthur Ventures.
Products and services ThreatLocker develops cybersecurity tools for networks, endpoints, and cloud systems, including enterprise-level cybersecurity tools for businesses. Their goal is to help businesses control what software can run in their environments and its capabilities.
It uses a zero trust approach, whereby the software only allows specific applications and user activity that have been approved rather than detecting and blocking it. ThreatLocker offerings include allowlisting, ringfencing, network access control, storage control, elevation control, and threat detection. The company expanded in 2026 with zero trust network and cloud access products for customers including managed service providers.
A 2025 TechRadar review of ThreatLocker's endpoint security product said that while it has an "unrefined UI", it is "quick and simple to deploy, and works great". Competitors include SentinelOne, CrowdStrike, Symantec Endpoint Protection, and Microsoft Defender for Endpoint.
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