Tuta
Encrypted email, calendar & cloud storage
Hanover, Germany
Founded 2011
Tuta (formerly Tutanota) is a secure email, calendar, and cloud storage service built and operated by Tutao GmbH, founded in 2011 in Hanover, Germany. All client applications are published as open source under the GPL-3.0 license, and the service uses end-to-end encryption with post-quantum cryptography to protect emails, calendar entries, and contacts. Tuta is bootstrapped and wholly owned by its two co-founders, with over 10 million users worldwide.
Websites:
Last Updated: May 25, 2026
Current Valuation
No valuation data available
Funding Summary
No funding data available.
Media Mention
June 23, 2026
DEV Community: Private Email Showdown 2026: Proton Mail vs Tutanota vs Mailbox.org — I ran all three for 90 days - DEV Community
Media Mention
June 3, 2026
Neowin: Tuta has joined Euro-Office and will now contribute to its codebase - Neowin
Media Mention
June 3, 2026
It's FOSS: Tuta Joins Other European Companies Under the Euro-Office Umbrella
Announcement
June 2, 2026
Tuta: Tuta joins Euro-Office - one week before launch | Tuta
Media Mention
June 2, 2026
CyberInsider: Euro-Office adds encrypted email provider Tuta ahead of public release
Showing 1-5 of 7 headlines
Page 1 of 2
Key People
Core OSS Projects
Open-source end-to-end encrypted email, calendar, and contacts client for web, desktop, Android, and iOS
License: GPL-3.0
Business Information
Category
EmailIndustries
Software
Technologies
CalendarPrivacyEncryptionEnd-to-End Encryption
Sectors
ConsumersSMBs
Licenses
GPL-3.0
Similar Companies
Socials and Communities
Cossmology Badge
COSS Weekly Newsletter
Stay up to date with the latest news, funding rounds, and announcements from the COSS universe.
Check out COSS Weekly on the web