ProtonMail was founded in 2013 by scientists who met at CERN and were drawn together by a shared vision of a more secure and private Internet. Since then, ProtonMail has evolved into a global effort to protect civil liberties and build a more secure Internet, with team members also hailing from Caltech, Harvard, ETH Zurich and many other research institutions.

Nylas Mail is an open-source desktop email client by Nylas, known for its emphasis on user-contributed extensions.

Polymail is the email platform for teams. By combining email with real time collaboration and integrating it with your team's other tools, Polymail allows everyone to work together seamlessly, move faster, and be more productive.

Spark helps you take your inbox under control. Instantly see what’s important and quickly clean up the rest. Spark for Teams allows you to create, discuss, and share email with your colleagues.

Email, group chat and tasks for productive teams. One app for all your internal and external communication. Work management at its best. Try it free!

Intelligent inbox and calendar for iOS, Android, Mac & Slack