Stalwart Labs

Stalwart Labs builds Stalwart, the open-source mail and collaboration server used by governments, universities, hosting providers, email service providers, and enterprises of all sizes around the world. It is a modern solution that integrates mail and collaboration protocols end to end, featuring built-in spam and phishing filters. The goal is to replace the legacy mail stack with a single product that simplifies administration and enhances security. Founded in July 2019, Stalwart Labs has quickly gained traction, with the first public release of Stalwart in September 2022. The product is designed for reliability and affordability, catering to both individual sysadmins and large hosting platforms. With a focus on security and clustering, Stalwart aims to make modern email management efficient and effective.