Fastmail is an independent email and productivity service offering fast, private email hosting for individuals and businesses. Its products bring email, calendars, and contacts together across devices, with native apps and offline access for reading, drafting, searching, and managing information. Features such as powerful search, message pinning and snoozing, scheduled sending, VIP notifications, and private notes help users stay organized and focused. Fastmail also provides masked email and aliases to help protect personal addresses and separate different activities.

The company offers email hosting for custom domains, business plans, migration tools for moving from services including Gmail, Outlook, Yahoo, Proton, and HEY, and support for adding Google or iCloud calendars. Customers can choose EU or US data residency. Fastmail says it does not use customer data for advertising or share it with third parties, and emphasizes security, backups, data portability, and 24/7 personal support. A free 30-day trial is available. Beyond its products, Fastmail contributes to open standards and interoperability, including the development of JMAP and open-source code used by organizations worldwide.