Impart Security

Impart Security is an application protection company building a runtime enforcement platform for web applications, APIs, large language models, and AI agents. Founded by veterans of Signal Sciences, the runtime security firm acquired by Fastly, the company focuses on inline blocking in production rather than out-of-band monitoring and alerting. Impart sells to enterprise security and application security teams and raised a $12 million Series A led by Madrona Ventures, with CRV and 8-Bit Capital, in 2025.