{"products":[{"slug":"proton-mail","name":"Proton Mail"},{"slug":"tuta-mail","name":"Tuta Mail"}],"rows":[{"key":"api_available","label":"Public API","unit":null,"higher_is_better":true,"decided":false,"reason_not_decided":"not measured on at least one side","better_index":[],"cells":[{"researched":true,"value":null,"verification_state":"unknown","confidence":0,"sources":[{"url":"https://proton.me/mail","tier":1,"type":"official_documentation","retrieved_on":"2026-09-03","role":"checked_without_finding"}]},{"researched":false,"value":null,"verification_state":null,"confidence":null,"sources":[]}]},{"key":"audit_log","label":"Audit log","unit":null,"higher_is_better":true,"decided":false,"reason_not_decided":"not measured on at least one side","better_index":[],"cells":[{"researched":true,"value":null,"verification_state":"unknown","confidence":0,"sources":[{"url":"https://proton.me/mail","tier":1,"type":"official_documentation","retrieved_on":"2026-09-03","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-28","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-03","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-06","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-09","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-11","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-16","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-13","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-19","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-21","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-23","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-30","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-26","role":"checked_without_finding"}]},{"researched":false,"value":null,"verification_state":null,"confidence":null,"sources":[]}]},{"key":"custom_email_domain","label":"Custom email domain","unit":null,"higher_is_better":null,"decided":false,"reason_not_decided":"no directional preference","better_index":[],"cells":[{"researched":true,"value":true,"verification_state":"verified","confidence":71,"sources":[{"url":"https://proton.me/support/custom-domain","tier":1,"type":"official_documentation","retrieved_on":"2026-10-03","role":"evidence"}]},{"researched":true,"value":true,"verification_state":"verified","confidence":71,"sources":[{"url":"https://tuta.com/support/howto","tier":1,"type":"official_documentation","retrieved_on":"2026-10-03","role":"evidence"}]}]},{"key":"data_export","label":"Data export","unit":null,"higher_is_better":null,"decided":false,"reason_not_decided":"no directional preference","better_index":[],"cells":[{"researched":true,"value":true,"verification_state":"verified","confidence":71,"sources":[{"url":"https://proton.me/support/proton-mail-export-tool","tier":1,"type":"official_documentation","retrieved_on":"2026-10-03","role":"evidence"}]},{"researched":true,"value":true,"verification_state":"verified","confidence":71,"sources":[{"url":"https://tuta.com/support/howto","tier":1,"type":"official_documentation","retrieved_on":"2026-10-03","role":"evidence"}]}]},{"key":"dpa_available","label":"Data processing agreement offered","unit":null,"higher_is_better":true,"decided":false,"reason_not_decided":"not measured on at least one side","better_index":[],"cells":[{"researched":true,"value":null,"verification_state":"unknown","confidence":0,"sources":[{"url":"https://proton.me/mail","tier":1,"type":"official_documentation","retrieved_on":"2026-09-03","role":"checked_without_finding"}]},{"researched":false,"value":null,"verification_state":null,"confidence":null,"sources":[]}]},{"key":"entry_price_month_usd","label":"Entry price per month","unit":"USD","higher_is_better":false,"decided":false,"reason_not_decided":"not measured on at least one side","better_index":[],"cells":[{"researched":true,"value":null,"verification_state":"unknown","confidence":0,"sources":[{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-09","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-11","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-16","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-13","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-19","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-21","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-23","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-26","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-28","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-30","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-03","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-06","role":"checked_without_finding"}]},{"researched":false,"value":null,"verification_state":null,"confidence":null,"sources":[]}]},{"key":"eu_data_residency","label":"EU data residency stated","unit":null,"higher_is_better":null,"decided":false,"reason_not_decided":"no directional preference","better_index":[],"cells":[{"researched":true,"value":null,"verification_state":"unknown","confidence":0,"sources":[{"url":"https://proton.me/mail","tier":1,"type":"official_documentation","retrieved_on":"2026-09-03","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-16","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-13","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-19","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-21","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-23","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-30","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-28","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-26","role":"checked_without_finding"}]},{"researched":false,"value":null,"verification_state":null,"confidence":null,"sources":[]}]},{"key":"fedramp","label":"FedRAMP authorisation","unit":null,"higher_is_better":true,"decided":false,"reason_not_decided":"not measured on at least one side","better_index":[],"cells":[{"researched":true,"value":null,"verification_state":"unknown","confidence":0,"sources":[{"url":"https://proton.me/mail","tier":1,"type":"official_documentation","retrieved_on":"2026-09-03","role":"checked_without_finding"}]},{"researched":false,"value":null,"verification_state":null,"confidence":null,"sources":[]}]},{"key":"free_mail_storage_gb","label":"Free mailbox storage, up to","unit":"GB","higher_is_better":null,"decided":false,"reason_not_decided":"no directional preference","better_index":[],"cells":[{"researched":false,"value":null,"verification_state":null,"confidence":null,"sources":[]},{"researched":true,"value":1,"verification_state":"verified","confidence":71,"sources":[{"url":"https://tuta.com/pricing","tier":1,"type":"official_documentation","retrieved_on":"2026-10-03","role":"evidence"}]}]},{"key":"free_tier","label":"Free tier","unit":null,"higher_is_better":true,"decided":true,"reason_not_decided":null,"better_index":[],"cells":[{"researched":true,"value":true,"verification_state":"verified","confidence":71,"sources":[{"url":"https://proton.me/mail/pricing","tier":1,"type":"official_documentation","retrieved_on":"2026-10-03","role":"evidence"}]},{"researched":true,"value":true,"verification_state":"verified","confidence":71,"sources":[{"url":"https://tuta.com/pricing","tier":1,"type":"official_documentation","retrieved_on":"2026-10-03","role":"evidence"}]}]},{"key":"free_trial_days","label":"Free trial length","unit":"days","higher_is_better":null,"decided":false,"reason_not_decided":"no directional preference","better_index":[],"cells":[{"researched":true,"value":null,"verification_state":"unknown","confidence":0,"sources":[{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-03","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-23","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-21","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-19","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-13","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-16","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-11","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-09","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-06","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-30","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-28","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-26","role":"checked_without_finding"}]},{"researched":false,"value":null,"verification_state":null,"confidence":null,"sources":[]}]},{"key":"gdpr_compliance_stated","label":"GDPR compliance stated","unit":null,"higher_is_better":true,"decided":false,"reason_not_decided":"not measured on at least one side","better_index":[],"cells":[{"researched":true,"value":null,"verification_state":"unknown","confidence":0,"sources":[{"url":"https://proton.me/mail","tier":1,"type":"official_documentation","retrieved_on":"2026-09-03","role":"checked_without_finding"}]},{"researched":false,"value":null,"verification_state":null,"confidence":null,"sources":[]}]},{"key":"hipaa","label":"HIPAA compliance stated","unit":null,"higher_is_better":true,"decided":false,"reason_not_decided":"not measured on at least one side","better_index":[],"cells":[{"researched":true,"value":null,"verification_state":"unknown","confidence":0,"sources":[{"url":"https://proton.me/mail","tier":1,"type":"official_documentation","retrieved_on":"2026-09-03","role":"checked_without_finding"}]},{"researched":false,"value":null,"verification_state":null,"confidence":null,"sources":[]}]},{"key":"iso27001","label":"ISO/IEC 27001","unit":null,"higher_is_better":true,"decided":false,"reason_not_decided":"not measured on at least one side","better_index":[],"cells":[{"researched":true,"value":null,"verification_state":"unknown","confidence":0,"sources":[{"url":"https://proton.me/mail","tier":1,"type":"official_documentation","retrieved_on":"2026-09-03","role":"checked_without_finding"}]},{"researched":false,"value":null,"verification_state":null,"confidence":null,"sources":[]}]},{"key":"mail_client_access","label":"Email client connection","unit":null,"higher_is_better":null,"decided":false,"reason_not_decided":"no directional preference","better_index":[],"cells":[{"researched":true,"value":"IMAP/SMTP through desktop Bridge","verification_state":"verified","confidence":71,"sources":[{"url":"https://proton.me/mail/bridge","tier":1,"type":"official_documentation","retrieved_on":"2026-10-03","role":"evidence"}]},{"researched":true,"value":"Provider apps; no IMAP/POP3/SMTP","verification_state":"verified","confidence":71,"sources":[{"url":"https://tuta.com/support/howto","tier":1,"type":"official_documentation","retrieved_on":"2026-10-03","role":"evidence"}]}]},{"key":"mobile_app","label":"Mobile app (iOS or Android)","unit":null,"higher_is_better":null,"decided":false,"reason_not_decided":"no directional preference","better_index":[],"cells":[{"researched":true,"value":null,"verification_state":"unknown","confidence":0,"sources":[{"url":"https://proton.me/mail","tier":1,"type":"official_documentation","retrieved_on":"2026-09-03","role":"checked_without_finding"}]},{"researched":true,"value":true,"verification_state":"verified","confidence":71,"sources":[{"url":"https://tuta.com/support/howto","tier":1,"type":"official_documentation","retrieved_on":"2026-10-03","role":"evidence"}]}]},{"key":"on_premises_option","label":"On-premises or self-hosted option","unit":null,"higher_is_better":null,"decided":false,"reason_not_decided":"no directional preference","better_index":[],"cells":[{"researched":true,"value":null,"verification_state":"unknown","confidence":0,"sources":[{"url":"https://proton.me/mail","tier":1,"type":"official_documentation","retrieved_on":"2026-09-03","role":"checked_without_finding"}]},{"researched":false,"value":null,"verification_state":null,"confidence":null,"sources":[]}]},{"key":"pci_dss","label":"PCI DSS stated","unit":null,"higher_is_better":true,"decided":false,"reason_not_decided":"not measured on at least one side","better_index":[],"cells":[{"researched":true,"value":null,"verification_state":"unknown","confidence":0,"sources":[{"url":"https://proton.me/mail","tier":1,"type":"official_documentation","retrieved_on":"2026-09-03","role":"checked_without_finding"}]},{"researched":false,"value":null,"verification_state":null,"confidence":null,"sources":[]}]},{"key":"public_list_price","label":"Public list price","unit":null,"higher_is_better":true,"decided":false,"reason_not_decided":"not measured on at least one side","better_index":[],"cells":[{"researched":true,"value":null,"verification_state":"unknown","confidence":0,"sources":[{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-13","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-16","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-11","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-09","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-06","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-30","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-28","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-26","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-23","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-21","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-19","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-03","role":"checked_without_finding"}]},{"researched":false,"value":null,"verification_state":null,"confidence":null,"sources":[]}]},{"key":"scim","label":"SCIM user provisioning","unit":null,"higher_is_better":true,"decided":false,"reason_not_decided":"not measured on at least one side","better_index":[],"cells":[{"researched":true,"value":null,"verification_state":"unknown","confidence":0,"sources":[{"url":"https://proton.me/mail","tier":1,"type":"official_documentation","retrieved_on":"2026-09-03","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-21","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-23","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-26","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-28","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-30","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-16","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-11","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-09","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-06","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-19","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-13","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-03","role":"checked_without_finding"}]},{"researched":false,"value":null,"verification_state":null,"confidence":null,"sources":[]}]},{"key":"soc2_type2","label":"SOC 2 Type II","unit":null,"higher_is_better":true,"decided":false,"reason_not_decided":"not measured on at least one side","better_index":[],"cells":[{"researched":true,"value":null,"verification_state":"unknown","confidence":0,"sources":[{"url":"https://proton.me/mail","tier":1,"type":"official_documentation","retrieved_on":"2026-09-03","role":"checked_without_finding"}]},{"researched":false,"value":null,"verification_state":null,"confidence":null,"sources":[]}]},{"key":"sso_saml","label":"Single sign-on","unit":null,"higher_is_better":true,"decided":false,"reason_not_decided":"not measured on at least one side","better_index":[],"cells":[{"researched":true,"value":null,"verification_state":"unknown","confidence":0,"sources":[{"url":"https://proton.me/mail","tier":1,"type":"official_documentation","retrieved_on":"2026-09-03","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-03","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-06","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-09","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-11","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-13","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-19","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-21","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-23","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-26","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-28","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-16","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-30","role":"checked_without_finding"}]},{"researched":false,"value":null,"verification_state":null,"confidence":null,"sources":[]}]},{"key":"uptime_sla_pct","label":"Uptime commitment","unit":"%","higher_is_better":true,"decided":false,"reason_not_decided":"not measured on at least one side","better_index":[],"cells":[{"researched":true,"value":null,"verification_state":"unknown","confidence":0,"sources":[{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-23","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-30","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-28","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-16","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-11","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-09","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-06","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-21","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-19","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-13","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-26","role":"checked_without_finding"},{"url":"https://proton.me/pricing","tier":1,"type":"official_pricing","retrieved_on":"2026-09-03","role":"checked_without_finding"}]},{"researched":false,"value":null,"verification_state":null,"confidence":null,"sources":[]}]}]}