This page aggregates measured, corroborated evidence: donors' iPhones recorded apps contacting this domain, every claim below was reported by separate accepted donations and published under a human verdict (later rows for an approved app inherit its verdict). A contact is a measurement, not an accusation — it does not show what data was sent.
vpn-api.proton.me
classified as first-party · 2
What our research panel found AI-drafted · human-reviewed
We ask several independent AI models the same question and publish their answers separately — cross-vendor agreement is evidence against fabrication, and disagreement is worth seeing. 3 of 3 models answered, overall confidence high. A human reviewed this domain's claims before anything here published.
Anthropic Claude — first-party
vpn-api.proton.me is a subdomain of proton.me, the app developer's own domain (Proton, publisher of Proton VPN), so this is a first-party API endpoint required for account authentication and VPN server configuration. Contact with the developer's own backend is consistent with the declared collection of email address, user IDs, and purchase history, so nothing appears undisclosed.
OpenAI — first-party
The vpn-api.proton.me domain appears to be a Proton-operated API endpoint associated with the Proton VPN app. The provided information does not establish a data flow beyond the app's declared collection categories.
Google Gemini — first-party
vpn-api.proton.me is a first-party API domain operated by Proton AG for core functionality of the Proton VPN app. First-party functional traffic does not indicate undisclosed third-party tracking or data sharing.
Apps measured contacting this domain
| App | Label gap | Donations | Contacts | Seen |
|---|---|---|---|---|
| Proton VPN: Fast & Secure VPN | — | 4 | 27 | 2026-07-28 → 2026-07-29 |
The corpus grows one report at a time: donate your App Privacy Report — anonymous by design.
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