Crosslayer Labs

Crosslayer Labs is a Y Combinator-backed company that protect, monitor and defend your Internet presence. The company participated in the Winter 2026 batch of Y Combinator.

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.

Crosslayer Labs was part of Y Combinator's Winter 2026 cohort, has a team of approximately 3 employees, and is actively operating.