Proton AG

#1 in Email Encryption

Plan-les-Ouates, Geneva, Switzerland

Products on G2

820

Total reviews

4.6

Avg. star rating

Proton Mail For Business ranks #1 in Email Encryption.
Reviews across Proton AG's portfolio declined 78.3% quarter-over-quarter.
Proton AG's 4 products span 15 categories on G2.
Small Business is the largest segment among reviewers, at 70.0%.

Traffic & LLM citations

Monthly G2.com page views and citations by AI answer engines, summed across Proton AG's products.

Page views and citations · Proton AG

Source: G2 review data

Winning from

Based on reviewers who said they switched from another vendor's product.

Google

Microsoft

Zoho

LastPass

Dropbox

Losing to

Based on reviewers of other products who said they switched from Proton AG.

Paubox

Shipmail

Titan

Virtru

Dropbox

Key stats

-78.3%

Small Business

2014

973

Plan-les-Ouates, Geneva, Switzerland

Adoption by company size

Segment	Share of reviews
Small Business	70.0%
Mid-Market	21.8%
Enterprise	8.2%

Quarterly history

Quarter	Total reviews	Avg. rating
2024 Q4	1	4.0
2025 Q1	1	5.0
2025 Q2	1	5.0
2025 Q3	3	5.0
2025 Q4	1	5.0
2026 Q1	3	4.8
2026 Q2	557	4.7
2026 Q3	121	4.7

About Proton AG

We launched Proton in the summer of 2014 after a successful public crowdfunding campaign in which over 10,000 individuals donated over $500,000 to bring our shared vision to life. Since then, Proton has grown to become the world's leading privacy company, used by millions globally, but we have never forgotten our humble beginnings. Proton services are operated by Proton AG, a Swiss corporation whose primary shareholder is the non-profit Proton Foundation based in Geneva, Switzerland. Proton exists to serve the world. We do not have venture capital investors, and our non-profit structure requires us to permanently put people before profits while protecting against takeover attempts. Our first and only obligation is always to the Proton community, not advertisers or other third parties. We do not compromise your trust by selling your data and never will. We are committed to fighting for privacy and freedom online and will always stand up to defend an internet that serves the interests of all people.