Intercom vs Proton Mail Comparison (2025)

What are the differences between Intercom and Proton Mail?

Written by

Forward Email Team

Published

7/1/25

Time to read

Less than 5 minutes

We recommend Forward Email as the best alternative to Intercom.

Email Service Comparison

20 facts in comparison

Intercom	vs.	Proton Mail
Intercom "The only AI customer service solution you need" Website	vs.	Proton Mail "Secure email that protects your privacy" Website
$39/mo	Pricing	$3.99/mo
No Intercom does not support storage	Storage	15 GB
20 MB	Attachments	25 MB
No	Open-Source	❌ Proton Mail claims to be open-source, but their back-end actually is closed source
No	Sandboxed Encryption	No
No	Unlimited Domains	No
No	Unlimited Aliases	No
No	TTI	No
No	SMTP	❌ Requires you to download Proton Mail Bridge and forces vendor lock-in
No	IMAP	❌ Requires you to download Proton Mail Bridge and forces vendor lock-in
No	POP3	❌ Proton Mail does not support POP3
❌ See blog post	API	No
No	E2EE	⚠️ Proton Mail rewrites your emails
No	OpenPGP	Yes
No	WKD	Yes

Email Service Screenshots

Closed-source

Intercom

Intercom is a closed-source email service. Their website says: The only AI customer service solution you need

Intercom is a closed-source email service.

Photo by Forward Email

Closed-source

Proton Mail

Proton Mail is a closed-source email service. Their website says: Secure email that protects your privacy

Proton Mail is a closed-source email service.

Photo by Forward Email

Compare Intercom with 78 email services