Proton Mail

VS

Signal

Cybersecurity Comparison

Proton Mail vs Signal: Side-by-Side Comparison

Proton Mail
Signal
Rating
★★★★★★★★★★
4.8/5
★★★★★★★★★★
4.7/5
Free Tier
Yes
Yes
Trial Days
30-day trial
None
Pricing
Free; Plus from $3.99/month
Completely free, funded by donations
Company
Proton AG
Signal Foundation
Founded
2013
2014
Best For
Journalists and activists needing legally protected private email communications
Privacy advocates wanting the most trusted end-to-end encrypted messaging available

Pros & Cons

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Proton Mail

End-to-end encryption means Proton cannot read your emails even if subpoenaed
Swiss legal jurisdiction provides some of strongest privacy protections globally
Zero-access encryption protects email subject lines and body at rest
ProtonMail Bridge lets you use Outlook and Apple Mail with encrypted backend
Onion site accessible via Tor for maximum anonymity even from Proton
Free tier limited to 500 MB storage and one email address only
Encrypted email only works between Proton users; external emails less protected

Signal

Signal Protocol encryption is industry standard adopted by WhatsApp and others
No metadata collection; Signal cannot see who you message or when
Disappearing messages with customizable timer per conversation thread
Note to Self encrypted personal notes sync across all your devices
Completely free with no ads, no data collection, and open-source code
Requires phone number for registration exposing identity to contacts
Desktop app requires phone to be active for some notification features

Use Case Analysis

Which is better for Privacy?

Both Proton Mail and Signal support Privacy workflows. Proton Mail has a slight edge with a 4.8 rating and Swiss-jurisdiction zero-knowledge encryption protects emails from provider access entirely. If Privacy is your primary use case, Proton Mail is the safer pick.

Which is better for Encryption?

Both Proton Mail and Signal support Encryption workflows. Proton Mail has a slight edge with a 4.8 rating and Swiss-jurisdiction zero-knowledge encryption protects emails from provider access entirely. If Encryption is your primary use case, Proton Mail is the safer pick.

Which is better for Two Factor Authentication?

Both Proton Mail and Signal support Two Factor Authentication workflows. Proton Mail has a slight edge with a 4.8 rating and Swiss-jurisdiction zero-knowledge encryption protects emails from provider access entirely. If Two Factor Authentication is your primary use case, Proton Mail is the safer pick.

Which is better for Endpoint Security?

Both Proton Mail and Signal support Endpoint Security workflows. Proton Mail has a slight edge with a 4.8 rating and Swiss-jurisdiction zero-knowledge encryption protects emails from provider access entirely. If Endpoint Security is your primary use case, Proton Mail is the safer pick.

Which is better for Password Management?

Both Proton Mail and Signal support Password Management workflows. Proton Mail has a slight edge with a 4.8 rating and Swiss-jurisdiction zero-knowledge encryption protects emails from provider access entirely. If Password Management is your primary use case, Proton Mail is the safer pick.

Verdict

Proton Mail edges out Signal with a 4.8 vs 4.7 rating. Proton Mail's main advantage: Swiss-jurisdiction zero-knowledge encryption protects emails from provider access entirely. That said, Signal may still be the better choice if Privacy advocates wanting the most trusted end-to-end encrypted messaging available.

Try Them Yourself

The best way to choose is to trial both. See full details on each:

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