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
April 16, 2026
It's FOSS: Privacy Email Service Tuta Now Also Has Cloud Storage with Quantum-Resistant Encryption
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