Lexius
Lexius is a YC Winter 2026 (W26) company. Based in San Francisco, CA, USA. Team of 3.
About Lexius
Summary
Lexius turns existing retail security cameras into an AI loss-prevention system for grocery and convenience stores. It watches every item cross the scan belt or self-checkout window, compares what it sees against the transaction log in real time, and flags skip-scans, sweethearting, and banana tricks the register never recorded. The product replaces manual lane monitoring and after-the-fact receipt audits without requiring new hardware.
Business model
Per-lane or per-site subscription pricing based on camera AI deployment across checkout lanes.
Go-to-market
Lexius sells to physical retailers, starting with grocery and convenience chains, and goes to market through direct sales with a demo-request flow on its site, as shown by its live deployment at OnCue.
From the Y Combinator listing
AI for Corporate Security Cameras
Lexius turns existing security cameras into an AI security guard that detects, documents, and alerts incidents like shoplifting and slip-and-falls. Millions of locations already have cameras but no intelligence. Replacing them costs $50K to $100K per site. Lexius upgrades every camera instantly, no rip and replace, no new hardware. Real-world camera systems are messy, fragmented, and decades old, and AI breaks on low-quality CCTV. The hard part isn’t the model, it’s making unreliable systems work at scale with accuracy high enough for real decisions. Lexius starts with security and liability, and becomes the operating system for physical spaces.
Facts
- B2B / B2B -> Security
- San Francisco, CA, USA
- 3
- Active
- Early
Founders (2)
- David Elskamp
- Liam Webster
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