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Proton Mail vs Cypher Comparison (2026)

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Proton Mail

Cypher

Overview

ProtonMail is a web-based email management platform that helps businesses securely transmit encrypted emails between users both inside and outside of the organisation.

Cypherdog Encryption (CE) provides the ability to encrypt and decrypt e-mails with attachments with confirmation of the identity of the parties to the communication. No "trusted" third party, zero-knowledge security model, asymmetric encryption.

Platforms supported

Web-based
iPhone app
Android app
Windows Phone app

Typical customers

Freelancers
Small businesses
Mid size businesses
Large enterprises

Customer support

Phone
Online
Knowledge base
Video tutorials

view more detailsview details

Platforms supported

Web-based
iPhone app
Android app
Windows Phone app

Typical customers

Freelancers
Small businesses
Mid size businesses
Large enterprises

Customer support

Phone
Online
Knowledge base
Video tutorials

view more detailsview details

Video & Screenshots

Pricing

Starting from

6.99

/user

Per month

Free trial available
Credit cardless trial
Free account
Subscription based

Starting from

/user

Per month

Free trial available
Credit cardless trial
Free account
Subscription based

User reviews

4.5

123

Value for money

Ease of use

Features

Customer support

72%

would recommend this app

4.8

103

Value for money

Ease of use

Features

Customer support

94%

would recommend this app

Pros

“The ability to generate a mask email address is fabulous and the integration with the brilliant suite of other Proton products is seamless.”

Gareth S.

Area Inclusion Worker

“The snooze function is great, the folders simple to create and the spam folder is intelligent, effective and means you don’t have to go trawling for that email you missed.”

Gareth S.

Area Inclusion Worker

“Storage on the free plan has been generous too, and no ads which is a nice change from Gmail.”

Davis M.

Head of Finance

Pros

“It provide end to end encryption and by this it enables all data are encrypted before leaving the sender and decrypts when reaches to intended person thus no third party in data sharing.”