Ontinue
Microsoft-focused managed detection and response provider, launched in 2023 by Swiss firm Open Systems.
Ontinue, a Microsoft-focused managed detection and response provider, agreed in September 2026 to be acquired by Edinburgh-based Quorum Cyber for an undisclosed price, one of 39 cybersecurity acquisitions SecurityWeek counted that month.
Last refreshed: 12 October 2026 · Appears in 1 active topic
What does Quorum Cyber gain by buying Ontinue?
Background
Ontinue sells managed detection and response services built on Microsoft Defender and Sentinel: it monitors customers' systems and responds to threats on their behalf, rather than selling software for customers to run themselves. It began in February 2023 as the brand for the managed detection and response division of Open Systems, a Swiss company, and lists headquarters in Zurich and Redwood City, California.
In September 2026 it agreed to be acquired by Quorum Cyber, based in Edinburgh, in a deal SecurityWeek listed among 39 cybersecurity acquisitions announced that month. Neither Quorum Cyber nor Ontinue disclosed a price. SecurityWeek reported that the combined company will offer what it calls a Microsoft-first security operations centre.
