Raised $2.6M across disclosed rounds.[2][3][6][7][4][5]

Seed closed March 2015, led by Charles River Ventures.[3][6][7]

post-money valuation is not publicly disclosed.

Named investors include Charles River Ventures, FONGIT.[3][6][7]

Andy Yen, Founder & CEO[31][37]

Raphael Auphan, Chief Operating Officer[32][33][34][35][36]

Bart Butler, Chief Technology Officer[32][33][34][35][36]

Marc Loebekken, Head of Legal[32][33][34][35][36]

Edward Shone, Head of Communications[32][33][34][35][36]

Lukas S., Head of Growth Studio, Engineering[32][33][34][35][36]

Tutanota (Tuta) · tuta.com · Named directly in Proton's enrichment data competitor list; same buyer (privacy-conscious individuals and businesses), same product category (encrypted email + calendar), same subscription model.[20]

Mailfence · mailfence.com · Named directly in Proton's enrichment data competitor list; competes on encrypted email and productivity suite for privacy-seeking users and businesses — the same workflow Proton targets.[20]

Microsoft 365 · microsoft.com · Explicitly named by MacTech alongside Google Workspace as the incumbent Proton Workspace is positioned against; Proton's own LinkedIn posts call out OneDrive as a data-harvesting alternative to Proton Drive.[17][20]

Element (Matrix) · element.io · Named directly in Proton's enrichment data competitor list; overlaps on open-source, privacy-first, encrypted communications for individuals and organizations.[20]

Google Workspace · workspace.google.com · Explicitly named by MacTech as the direct incumbent Proton's new Workspace product is positioned against; same buyer workflow (business email + cloud storage + video conferencing + calendar).[17]

The customer proof is company-sourced only. No independent source in this ledger confirms it.[16]

Ask for one referenceable production customer.

Not a recommendation. The first thing this ledger cannot answer.

Filled in the side panel for invited readers. This card carries sourced facts only.