Mailfence is a web-based email service that offers OpenPGP based end-to-end encryption and digital signatures. Developed by ContactOffice Group sa
License: Freemium
Mailfence is focused on privacy and security with end-to-end encryption, making it a great choice for those prioritizing data protection. Kolab Now, on the other hand, offers a more robust collaboration suite, making it ideal for teams needing shared tools and functionalities.