At the heart of every security team, there’s a database. That database records each time a user logs in, every packet of inbound traffic, & each attempted attack. Architected before AI, these SIEM systems are wooden shields in an era of autonomous attackers.
The consequences are mounting. Deepfake scams have stolen tens of millions. AI-generated phishing bypasses legacy filters. As Mythos has shown, the sophistication of attacks will only increase.
Shachar Hirshberg & Dan Shiebler saw this opportunity. Shachar led the Amazon GuardDuty product, scaling the business to over 80,000 customers. Dan built & led the 60-person AI/ML team at Abnormal Security. Together, they started Artemis to build a database to power defenses for modern security teams. Within a few months, they have more than a dozen production enterprise deployments & are processing over a billion events per hour. We are excited to partner with them at the Series A, along with our friends at Felicis, Brightmind, & First Round.
At the core of this new SIEM are three technologies :
Semantic understanding. To a traditional SIEM, a log is just a string of text. It has no understanding that “jdoe” in Okta & “john.doe” in AWS are the same person, or that a sequence of individually benign actions might constitute an attack. Artemis turns raw logs into a living model of the customer’s environment : users, assets, relationships, & security posture.
Agentic detection. Legacy platforms rely on brittle, hand-written rules. An engineer writes a detection rule : “if events A, B, & C happen in sequence, fire an alert.” It works for a couple months. Then a new service gets added, log formats change, & the rule breaks. Artemis’ detections include multi-step reasoning agents that dynamically query data, perform aggregations, & reason about context to confirm a threat before ever surfacing an alert.
Closed-loop learning. Legacy platforms get worse over time : static detections degrade with changing data & behaviors. Artemis gets better : with each incident or proactive threat hunt, the system identifies new patterns. These are converted into permanent detections that are researched, validated, & maintained fully autonomously.
The result is a platform that doesn’t just store & search data, but reasons about it autonomously.
If you’re interested in learning more or joining this mission, check out the open roles at Artemis & Shachar’s post