Artemis Security
Artemis Security provides an AI-native security operations platform that detects, investigates and responds to cyber attacks.
- Categories
- SIEM, Managed detection and response, EDR and XDR, Incident response
- Based in
- New York, United States
- Ownership
- Private
About Artemis Security
Artemis Security sells an AI-native platform for security operations. It detects, investigates and stops attacks using a live model of the customer's environment, covering users, accounts, devices, resources and AI agents. The model is built from systems that already hold organisational truth and is refreshed hourly. Detection draws on that model at the moment it runs, rather than looking up context after another tool raises a flag. The company targets security teams running enterprise SOCs, from large enterprises to AI-native startups. It positions itself against traditional SIEM tools, which it says are noisy, costly and blind to fast AI-driven attacks. Artemis claims early deployments cut mean time to detect and respond by 94%. It also offers a managed detection and response service where senior analysts operate the platform around the clock, validate every customer-visible case and own the response within limits the customer sets in advance.
Products
- Orion-1A frontier model built for cyber defence.
- AI ModeA plain-language interface for authoring detectors and running hunts.
- Artemis MCPA connector that lets security engineers work with the platform programmatically.
Ownership and deals
- Raised $55m in a Series A roundInvestor FelicisReport on the Artemis Security funding round of April 2026 (opens in a new tab)
- Raised $15m in a seed roundInvestors Brightmind Partners and First Round CapitalReport on the Artemis Security funding round of April 2026 (opens in a new tab)
Acquisitions come from SecurityWeek's monthly M&A round-ups from 2021 onwards, from Cybersecurity Ventures' quarterly M&A reports for 2020, and a few from Wikipedia lists. Funding rounds from 2022 onwards come from Return on Security's weekly Security, Funded newsletter. These are dated to the month. A few deals added from the news are dated to the day. Smaller deals may be missing. Amounts are in US dollars.