eSentire buys stealth AI security startup to monitor workplace AI use
Waterloo, Ont.-based eSentire has acquired an unnamed stealth-mode AI security startup and turned its technology into a new module for its Atlas platform, the company announced Sept. 15. eSentire did not name the startup or disclose the price.
The module, called Atlas AIDR, is aimed at a problem many security teams now face: employees and automated agents are using AI tools with company data, and there is often no audit trail of what was shared, with which service, or at what cost.
What the module does
According to eSentire's announcement, Atlas AIDR sits inside the company's Atlas Detect service and records AI activity in real time, including conversation timelines, the tools an agent calls and security events, tied to a specific user, team and workstation. It keeps an inventory of agents, models, providers and Model Context Protocol (MCP) servers in use.
It can also act inline. eSentire says the module redacts personal information before it reaches a model, screens for prompt injection and enforces custom business rules. It tracks external MCP servers that agents rely on and flags when a server's description or behaviour changes, a check aimed at tampered or malicious agent tools. Token use and cost are broken down per request.
Chief executive James C. Foster said the company acquired the startup's team and product and shipped the technology inside Atlas "in weeks." The module is generally available to eSentire customers and partners.
Why it matters
IT Brief reported that eSentire cited McKinsey research showing 76 per cent of employees now use AI at work. For organizations subject to Canadian privacy law, untracked AI use creates a practical risk: personal information can leave the organization without any record of where it went. Tools of this type are designed to give privacy and security teams that record.
eSentire, which says it protects more than 2,000 organizations, launched two other Atlas modules earlier in 2026, one for automated penetration testing and one for email security and patch management. It is one of several Canadian security firms, along with 1Password and Cohere, to buy AI-focused security technology this year.
eSentire has not said how many staff joined from the startup or where they are based.
