Artemis

Artemis is a cybersecurity company building an AI-native security operations platform intended to counter AI-driven attacks. The system ingests federated telemetry from across a customer's stack — logins and identity activity, machines, cloud workloads, network data and SaaS applications — and combines behavioral logs with business context to build a dynamic model of what is normal for that specific organization. From that model it continuously generates tailored detections rather than relying on static, generic rules.

On top of the environment model, Artemis runs AI agents that perform threat hunting via natural-language queries and carry out autonomous investigations. Rather than emitting isolated alerts, the platform correlates related signals — for example an identity permission change alongside unusual cloud activity — into coherent "attack stories," and can execute automated responses such as isolating a compromised identity before an attacker moves laterally. The company reports that customer deployments process billions of events per hour and more than 15,000 TB of data per day, and that the platform reduces mean time to detect and respond by 94%.

Founding story

Artemis was founded roughly six to seven months before its April 2026 launch by Shachar Hirshberg (co-founder and CEO) and Dan Shiebler (co-founder and CTO). Hirshberg served in the Intelligence Corps, was a development manager at Demisto — acquired by Palo Alto Networks for approximately $560–600 million — and subsequently led product for AWS GuardDuty, a cloud threat detection service cited as used by 90% of the top 2000 AWS customers. Shiebler led the AI and machine learning team at Abnormal Security/Abnormal AI, where the company reports 20x revenue growth during his tenure, previously held machine learning leadership roles at Twitter, and holds a PhD in machine learning from the University of Oxford. The founders concluded that traditional security architectures were not suited to an environment where attacks are automated and executed at machine speed.

Business model

Artemis sells its security operations platform to enterprise security teams. A company spokesperson said it had closed a few seven-figure deals and expected multimillion dollars in annual recurring revenue before the end of 2026.

Enterprise software contracts with security organizations; the company cited seven-figure deals and an ARR expectation for 2026.

Traction

About 30 employees at launch, growing roughly one to two people per week, with plans to reach approximately 65 by the end of 2026. Early customers include Mercury, Wix, Lemonade, Upwork and Abnormal AI. The company reports a few closed seven-figure deals, expectations of multimillion-dollar ARR before the end of 2026, customer deployments processing billions of events per hour and over 15,000 TB daily, and a reported 94% reduction in MTTD/MTTR. The founders say users spend roughly three to four hours a day in the product.

Latest developments

Artemis emerged from stealth on April 15, 2026 with $70 million in combined seed and Series A funding — a $15 million seed co-led by First Round Capital and Brightmind and a $55 million Series A led by Felicis — and simultaneously disclosed its first customers and hiring plans across engineering, AI/ML, security, product and sales.