Perimeter

Perimeter was a home security startup founded in 2020 that offered an outdoor monitoring subscription service designed to prevent home invasions. The product used non-camera, non-audio sensing technology to detect human presence around a home's perimeter, alerting homeowners to unauthorized entry attempts without requiring traditional surveillance infrastructure. The subscription model provided continuous outdoor monitoring as a proactive deterrent, positioning the service as a smarter alternative to reactive alarm systems. The company participated in the SOSV accelerator program. As of research date, the domain getperimeter.co redirects to Echo54, a company building mission-critical people-sensing systems for government, military, and high-security environments — suggesting Perimeter's technology may have pivoted or been absorbed into Echo54's commercial offering.