YC Companies/Winter 2026/Crosslayer Labs
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Crosslayer Labs

Protect, monitor and defend your Internet presence

Winter 2026B2B / B2B -> Security3 employees

About

Crosslayer Labs detects impersonation attacks on websites and APIs. We provide "outside-in" monitoring of customer infrastructure, comprehensively discovering and monitoring all Internet dependencies, including DNS, BGP, TLS certs, Javascript. We correlate signals from different layers of the Internet stack to identify attack patterns. Our alerts are actionable and contain root cause analysis/remediation recommendations. Our founding team is world renowned for previously inventing the MPIC standard adopted by all the major CAs including Google, Apple, Amazon. The MPIC standard is securing over 700 million websites via the issuance of over 3 billion digital certificates, and is now a global internet standard that protects every single HTTPS connection.

Founders (3)

Henry Birge-Lee
Founder
Grace Cimaszewski
Founder
Prateek Mittal
Founder

Details

Status
Active
Stage
Early
Team Size
3
Regions
Remote, Partly Remote