Cryptomator
Skymatic GmbH
Proton Mail: Encrypted Email
Proton AG
OpenKeychain: Easy PGP
Hardware Security SDK
Yahoo Mail – Organized Email
Yahoo
Samsung Email
Samsung Electronics Co., Ltd.
FlowCrypt Encrypted Email
FlowCrypt a.s.
Email - Fast & Secure Mail
Edison Software
AOL: Email News Weather Video
AOL Media LLC
Skiff Mail - Private email
Skiff World, Inc.