Proton Mail
VERIFIEDSwiss end-to-end encrypted email by Proton AG (Geneva); 100M+ users, Foundation-controlled since June 2024.
Why this score?
Proton Mail is operated by Proton AG (Geneva CH) — controlled by the non-profit Proton Foundation since June 2024 — with end-to-end + zero-access encryption, Swiss jurisdiction (outside EU but under FADP + strong privacy law), own Swiss data centres, ISO 27001, 100M+ users, fully open-source clients, independently audited; 5/5 with no CLOUD Act exposure.
- SCORE
- 5.0/5
- CLOUD ACT
- CLOUD ACT EXPOSURE
How exposed customer data is to US authorities under the CLOUD Act.
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None This listing EU operator, no US parent, no US sub-processors of note.
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Minor A transient US sub-processor (CDN, maps); data at rest stays in the EU.
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Material US parent, or a core sub-processor is a US-owned hyperscaler.
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Direct The operator itself is US-incorporated.
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- OWNERSHIP
- OWNERSHIP
Where ultimate control over the operating company sits.
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EU-owned EU-incorporated and EU-controlled; no significant US ownership.
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EU HQ, US-funded EU-headquartered but US venture- or PE-controlled.
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US-owned US-headquartered, or has a US parent company.
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Other This listing Swiss, UK or another non-EU jurisdiction.
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- SUB-PROCS
- — not disclosed
JUMP TO
About Proton Mail
Sub-processor map · not disclosed
Frameworks & certifications
Capability matrix
Pricing & tiers
Public documents
Alternatives in this category
Swiss email + groupware (Infomaniak Group SA, Geneva, since 1994), own Swiss DCs, ISO 27001 + B Corp 2025, free tier with @ik.me address.
- EU / adequacy operator
- EU / adequacy hosting
- No US CLOUD Act exposure
- Third-party certification
- Open-source clients
- Public DPA
- Sub-processors disclosed
How exposed customer data is to US authorities under the CLOUD Act.
-
None This listing EU operator, no US parent, no US sub-processors of note.
-
Minor A transient US sub-processor (CDN, maps); data at rest stays in the EU.
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Material US parent, or a core sub-processor is a US-owned hyperscaler.
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Direct The operator itself is US-incorporated.
Berlin-based private email + drive + meet + office bundle (Heinlein Support GmbH); ISO 27001 + BSI C5, €1/mo entry.
- EU / adequacy operator
- EU / adequacy hosting
- No US CLOUD Act exposure
- Third-party certification
- Open-source clients
- Public DPA
- Sub-processors disclosed
How exposed customer data is to US authorities under the CLOUD Act.
-
None This listing EU operator, no US parent, no US sub-processors of note.
-
Minor A transient US sub-processor (CDN, maps); data at rest stays in the EU.
-
Material US parent, or a core sub-processor is a US-owned hyperscaler.
-
Direct The operator itself is US-incorporated.
Berlin one-person-shop privacy email at €1/mo (Posteo e.K., since 2009); anonymous signup, BSI TR-03108 certified.
- EU / adequacy operator
- EU / adequacy hosting
- No US CLOUD Act exposure
- Third-party certification
- Open-source clients
- Public DPA
- Sub-processors disclosed
How exposed customer data is to US authorities under the CLOUD Act.
-
None This listing EU operator, no US parent, no US sub-processors of note.
-
Minor A transient US sub-processor (CDN, maps); data at rest stays in the EU.
-
Material US parent, or a core sub-processor is a US-owned hyperscaler.
-
Direct The operator itself is US-incorporated.