Kolab Now is a web-based email and groupware service, based completely on free and open-source software. Developed by Kolab Systems AG
License: Commercial
Kolab Now is a complete collaboration suite with strong user management and security features, making it suitable for businesses looking for a robust email solution. In contrast, GPGMail is a more specialized tool focused on email encryption, appealing to users who prioritize privacy and control over their email communications.