Darktrace Ltd. is a British-American[5] cyber security company, established in 2013 and headquartered in Cambridge, England and San Francisco,United States[2] [5] It was listed on the London Stock Exchange until it was acquired by Thoma Bravo in October 2024.

[7][8] Lynch was co-founder of Autonomy, sold to Hewlett-Packard in 2011 in a transaction leading to accusations of fraud and to a legal fight over extraditing him to the United States.

[15] At the beginning of 2025, the company announced that it had acquired Cado Security, a firm specializing in investigations in the context of cyberattacks.

[16] On 31 January 2023, Quintessential Capital Management [d], a New York-based hedge fund and short seller, published a detailed report alleging potential accounting errors at Darktrace, making claims about potential irregularities in contracts with resellers and customers, predominantly dating from before Darktrace's public listing in 2021.

[24] Darktrace's product uses unsupervised machine learning techniques to build an intrinsic "pattern of life" for every network, device, and user within an organisation.

Speaking in 2021, Nicole Eagan, chief strategy officer, said: "At Darktrace, we have a track record of innovation and providing our customers with the technology they need to keep up with the most complex attacks.

We have seen an increased need for autonomous cyber defence as companies have transitioned to work from home and adopted more cloud-based tools.