Proton AG
PrivateLast Round
Grant
Mar 8, 2019
Total Funding Raised
$5.35M
Momentum
Top 1%
of companies Caplight tracks
Company Overview
Proton AG is a software company that provides a suite of privacy-focused online services, including encrypted email, VPN, calendar, cloud storage, and a password manager.
Sector
Cybersecurity
Verticals
Data Protection, Email Security, Cloud Security, Identity & Access
Business Model
B2C
Customer Profile
Subscription SaaS, Freemium
AI Layer
Application
Keywords
Historical Pricing
Historical view of private secondary pricing and transaction trends.
Proton AG Comparables
Compare Proton AG with similar companies based on industry and business-model similarity.
| Company | Similarity | Market Cap |
|---|---|---|
| Mailfence | 82% | |
| mailbox.org | 82% | |
| Nord Security | 81% |
Proton AG Funding Rounds
Historical fundraising activity
| Round | Date | Amount Raised | Valuation | Investors | Sources |
|---|---|---|---|---|---|
| Grant | Mar 8, 2019 | ||||
| Seed | Mar 18, 2015 | ||||
| Crowdfunding | Aug 31, 2014 | ||||
| Crowdfunding | Jul 30, 2014 |
Proton AG Investors
Notable investors and investment history
| Investor | Rounds |
|---|---|
| Fongit | Seed |
| European Commission | Grant |
| CRV | Seed |
Market signals
Structured signals derived from secondary market and firmographic data.
- Jun 15, 2026
Company claims to be doubling in size every year.
- Jun 15, 2026
Grew to over 700 team members.
Recent news
Latest coverage and updates
- has_issues_withSep 1, 2026
Proton had issues with service disruption tied to a hardware failure on Sep 1st '26.
- has_issues_withSep 1, 2026
Proton had issues with major outage caused by a data center cooling failure on Aug 27th '26.
- has_issues_withAug 27, 2026
Proton had issues with critical cooling failure on Aug 27th '26.
- has_issues_withAug 26, 2026
Proton had issues with problems across its website, login system and app on Aug 27th '26.
- launchesAug 24, 2026
Proton launched free tool on Aug 18th '26.
Proton AG Filings
Explore SEC and related filing metadata, where available.
| Type | Date | Amount Offered | Amount Sold | Filing | Pages | Download |
|---|
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