U.S.-based cybersecurity startup Artemis, founded by Israeli entrepreneurs, has raised US$70 million in a Series A round led by Felicis, with First Round Capital and Brightmind also investing.
Other investors included Theory VC, Two Sigma, Lockstep, and well-known cybersecurity leaders, including founders and senior executives from companies like Splunk, CrowdStrike, Palo Alto Networks, Microsoft, and Okta.
Artemis is building tools for a new “AI vs AI” security world, where AI is used to detect and fight threats. Its platform creates a smart data model by studying a company’s internal activities.
It looks at behavior across users, machines, cloud systems, and applications, along with business context, to understand if an action is truly unusual or actually makes sense for that company.
The platform can also respond automatically, helping companies act very quickly. For example, it can block a hacked account before an attacker spreads further in the system.
Artemis currently has about 30 employees in New York City and plans to grow its team to around 65 people by the end of 2026.
“We built Artemis as an AI-native defense system from the ground up,” said Shachar Hirshberg, co-founder and CEO of Artemis. “The question isn’t whether this model wins, but who builds it best. Some of the largest and fastest-growing companies in the world are among our first customers, and we’re able to deliver value to them on day one. That trust matters, and we intend to earn it every day.”
Founded in 2025 by Shachar Hirshberg and Dan Shiebler, Artemis is building advanced security tools that use AI to protect companies, especially in a world where cyber threats are also powered by AI.
Its platform can quickly detect and stop critical threats while providing clear, actionable information.
It works efficiently by only using the most important data all the time and fetching extra data when needed, which helps reduce costs while still keeping full visibility.
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