Castor, a provider of clinical trial software, announced the closing of a $45 million Series B financing round, bringing the company's total funding to $65 million.

The round was led by Eight Roads Ventures and F-Prime Capital with participation from existing investors Two Sigma Ventures and Inkef Capital.

Castor offers a modern, self-service clinical research platform, which enables researchers to design studies and integrate data from any source in real-time. Patients can enroll themselves in trials, consent and share their data online or via a mobile app, allowing the industry to seamlessly shift to decentralized clinical trials (DCT).