Compare Cloud Mail and Proton Mail on capabilities, jurisdiction, assurance, and fit for European buyers.
Both listed as alternatives to: Gmail, Google Workspace, Microsoft 365, Outlook.com
Italy· Email Services
Needs review
Shortlist Cloud Mail when you need Italian-operated, managed domain email with Plesk, Roundcube, CalDAV/CardDAV, and pre-delivery antispam on Seeweb infrastructure. Skip when you need end-to-end encrypted / zero-access mail (consider Proton Mail or Tuta) or a full Workspace/365 productivity suite (Google Workspace / Microsoft 365).
Switzerland· Email Services
Needs review
Shortlist Proton Mail when you want Swiss-jurisdiction, zero-access encrypted email with open-source clients, custom domains, Bridge for desktop mailers, and a public DPA. Skip when you need free-tier IMAP Bridge, fully self-hosted FOSS mail on your own servers, or Workspace-class collaboration depth—consider Tuta, Posteo, or Mailfence among EU peers, or stay on Google/Microsoft if suite lock-in wins.
Highlighted rows differ between the two products.
| Feature | Cloud Mail | Proton Mail |
|---|---|---|
| Country of origin | Italy | Switzerland |
| Category | Email Services | Email Services |
| Open source | No | No |
| Self-hosted | No | No |
| Headquarters | Italy | Switzerland |
| Legal entity | Seeweb S.r.l. (VAT IT02043220603), Via Armando Vona 66, 03100 Frosinone | Proton AG, Route de la Galaise 32, 1228 Plan-les-Ouates, Geneva, Switzerland (EU representative: Proton Europe sàrl, Luxembourg) |
| Governing law | Italy / EU (forum of Frosinone referenced in general conditions) | Swiss law (Terms; Geneva courts for business/non-US consumer disputes as stated in Terms) |
| US parent / control | No known US parent | No known US parent |
| CLOUD Act exposure (indicative) | Low | Medium |
| Hosting / residency | Seeweb-operated European infrastructure (proprietary DCs in Milan and Frosinone; group facilities also listed in Lugano, Zurich, Sofia). Cloud Mail backups: daily off-site to another Seeweb data center using IBM Spectrum Protect software. CISPE materials claim European territorial storage for covered cloud services. No public AWS/GCP/Azure hosting path found for this product. | Primary mail storage on Proton-owned servers in Switzerland (vendor security pages). Not marketed as AWS/GCP/Azure inbox hosting. Public privacy policy lists US-group processors for support and payments (Zendesk; Chargebee, Stripe, PayPal) and group support processing in North Macedonia and Taiwan; HubSpot noted for business sales inquiries. |
| Summary | Seeweb’s managed professional domain email: Plesk admin, Roundcube webmail, CalDAV/CardDAV, pre-delivery antispam, and daily off-site backups on Italian/EU infrastructure. | Swiss end-to-end encrypted email from Proton AG: zero-access inbox storage, open-source clients, custom domains, and Bridge for desktop IMAP clients. |
| Tags |
| At a glance | Cloud Mail | Proton Mail |
|---|---|---|
| HQ | Frosinone, Italy (Seeweb S.r.l.) | Plan-les-Ouates (Geneva), Switzerland |
| Group | DHH (Euronext Growth Milan) since 2020 | Not listed |
| Product type | Managed domain email hosting | Not listed |
| Admin / webmail | Plesk + Roundcube | Not listed |
| Protocols | IMAP, POP3, SMTP, CalDAV, CardDAV | Not listed |
| Open source product | No (managed service; Roundcube is the webmail UI) | Not listed |
| Self-hosted product | No | Not listed |
| Commercial model | Paid storage/mailbox packs; domain required; WhiteLabel available | Freemium + paid consumer and business seats |
| Legal entity | Not listed | Proton AG (CHE-354.686.492); Proton Foundation supervision |
| Hosting model | Not listed | Proton-owned hardware in Switzerland (vendor claim) |
| Self-host | Not listed | No (SaaS); clients open source |
| Bridge | Not listed | Paid plans that include Mail |
| Key capabilities | Cloud Mail | Proton Mail |
|---|---|---|
| Managed domain email | Yes | Not listed |
| Plesk administration | Yes | Not listed |
| CalDAV / CardDAV | Yes | Not listed |
| ISO 27001 (claimed) | Yes | Not listed |
| CISPE CoC (claimed) | Yes | Not listed |
| Italian / EU operator | Yes | Not listed |
| E2EE + zero-access | Not listed | Yes |
| Swiss-operated | Not listed | Yes |
| Bridge (IMAP/SMTP) | Not listed | Yes |
| Open-source clients | Not listed | Yes |
| ISO 27001 & SOC 2 (claimed) | Not listed | Yes |
| Public B2B DPA | Not listed | Yes |
Plesk domain mail admin (mailboxes, aliases, forwards)
One admin account manages mailboxes, passwords, aliases, forwards, and auto-replies in Plesk, with quota/usage visibility per account. Suited to SMEs and resellers who want classic hosting-style control without running their own MTA.
Roundcube webmail + IMAP/POP3/SMTP on mail.truemail.it
Users access mail via Roundcube (webmail.truemail.it) or standard clients. Docs publish IMAP/POP3/SMTP endpoints with STARTTLS and SSL port options for Outlook, Thunderbird, Apple Mail, and mobile. CalDAV and CardDAV cover calendar and contacts sync.
Managed pre-delivery antispam/antivirus (no default spam folder)
Centralized filters check sender IP/domain behaviour and content before the message is accepted. Rejected spam is returned to the sender rather than filed in a default spam mailbox; false positives are handled via ticket or report@postmaster.seeweb.it. Accuracy is not claimed to be 100%.
Daily off-site backups (IBM Spectrum Protect, 30-day history)
Incremental daily backups run to a remote Seeweb data center using IBM Spectrum Protect software. Deleted mail can be requested for recovery within about 30 days; restores recover the backed-up set rather than individual selected messages, so IMAP is recommended.
Scalable domain packs + WhiteLabel resale
Plans scale from small 5 GB / 5-mailbox packs through large multi-hundred-GB packs with matching mailbox counts (up to on the order of 1,280 mailboxes). A domain is required at activation. WhiteLabel supports partners who resell branded mail on Seeweb’s managed stack.
Zero-access inbox encryption by default
Bodies and attachments are encrypted so Proton states it lacks keys to read stored mail. Proton-to-Proton traffic is end-to-end encrypted automatically; external recipients need password-protected messages or PGP/WKD for comparable content protection. Subject lines are not fully E2EE under OpenPGP header rules.
Proton Mail Bridge for desktop IMAP clients
Paid plans that include Mail can run Bridge locally to connect Outlook, Thunderbird, or Apple Mail over IMAP/SMTP while encrypting and decrypting on the device. Free accounts use official web/mobile/desktop apps instead of Bridge.
Custom domains, aliases, and business admin
Paid and business tiers support custom domains, extra addresses, catch-all and groups, hide-my-email aliases, and org admin for seats, storage, and retention policies. Suits teams leaving Google/Microsoft who still need branded addresses.
Open-source clients with published audits
Web, mobile, and desktop clients are published on GitHub with third-party audit reports linked from Proton’s open-source page. The hosted mail backend is not offered as self-hosted FOSS—audit client trust, not full server reproducibility.
Tracker blocking, PhishGuard, and Sentinel
Built-in tracker protection, phishing heuristics, link confirmation, SPF/DKIM/DMARC for custom domains, hardware-key 2FA, and optional Proton Sentinel monitoring for high-risk accounts. Complements encryption with everyday abuse defenses.
| Assurance & compliance | Cloud Mail | Proton Mail |
|---|---|---|
| Independent security / no-logs audit | Not found No public third-party no-logs or mail-specific penetration audit PDF found for Cloud Mail; ISO ISMS certs are separate. | Vendor claimed Open-source clients with published third-party audit reports (web/desktop links on open-source page). Not a classic VPN no-logs court test; transparency report covers legal orders for accessible account data. |
| ISO 27001 | Vendor claimed Vendor certifications page: ISO/IEC 27001:2022, scope includes mail services; AXE REGISTER cert IT18-27702D (listed valid until 28 Nov 2027). Not independently re-verified in a public registry by this draft. | Vendor claimed Vendor announces ISO 27001 certification after external audit completed 2 May 2024; Trust Center links a certificate download. Confirm scope and validity at procurement time. |
| ISO 27017 / 27018 (cloud) | Vendor claimed Published on certifications page as appendices to the ISO 27001 certificate; mail services in process scope. | Not listed |
| SOC 2 / SOC 3 | Not found Not listed on the public certifications page. | Vendor claimed Vendor announces first SOC 2 Type II attestation (July 2025 blog). Report typically under NDA—request from vendor for diligence files. |
| GDPR / EU data protection | Vendor claimed Italian controller entity, named DPO, privacy policy under GDPR; product marketed as GDPR-oriented; CISPE CoC adherence claimed. | Vendor claimed Swiss controller/processor with EU representative; public DPA; GDPR materials for business. Adequacy/transfer mechanisms documented for non-adequate destinations. |
| CISPE Code of Conduct | Vendor claimed Certifications page: Seeweb cloud services adhere to CISPE; claims storage exclusively within European territories for covered services. | Not listed |
| US CLOUD Act exposure (indicative) | Partial EuropeanStack assessment: EU entity, DHH European group, no known US parent; public hosting story is Seeweb EU DCs and CISPE EU territory claim; backups on Seeweb off-site DCs (Spectrum Protect software, not described as US cloud mailbox SaaS). Residual gaps: no full public subprocessor list; antispam uses external reputation services not named on the docs page. Not legal advice. | Partial Swiss entity / no known US parent; inbox content on Proton-owned Swiss hardware with zero-access design. Partial exposure remains via US SaaS subprocessors (Zendesk support; Stripe/Chargebee/PayPal payments) and any account metadata Proton can access under Swiss process. Not legal advice. |
| Data processing agreement (B2B) | Not found No downloadable product DPA found on the marketing site; general conditions reference GDPR processing and the privacy notice. Request Art. 28 terms for mail content before go-live. | Vendor claimed Public DPA at proton.me/legal/dpa forms part of terms when Proton acts as processor; Swiss law, Geneva jurisdiction; general authorization for listed subprocessors. |
| EU AI Act | Not applicable Cloud Mail is conventional email hosting, not an AI product. | Not applicable Core product is encrypted email. Optional Scribe assistant is ancillary; not an AI-centric offering for this catalog entry. |
| Considerations & known limitations | Cloud Mail | Proton Mail |
|---|---|---|
| Subprocessor / antispam feed list not public | Medium Docs mention reputation services for antispam but do not publish a complete subprocessor table. Procurement should request the current list and transfer safeguards. | Not listed |
| Backup restore is set-based, not single-message | Low 30-day off-site history is useful, but restores recover the backed-up set; plan operational recovery expectations and prefer IMAP. | Not listed |
| Pre-delivery reject without default spam folder | Low Strong filtering can block legitimate senders; there is no user-visible spam quarantine by default—use tickets/reporting workflows. | Not listed |
| Not zero-access / E2EE-first mail | Medium Provider-managed conventional mail. Choose encrypted peers if the threat model assumes a compromised host provider. | Not listed |
| B2B DPA not prominent on site | Medium Treat contract/DPA negotiation as a gate for regulated workloads until Art. 28 terms and roles (controller/processor for mailbox content) are signed. | Not listed |
| Weaker defaults outside Proton | Not listed | Medium Mail to Gmail/Outlook/others is not E2EE unless password-protected or PGP/WKD is used. Subject lines are not fully E2EE. Train users or you only protect the Proton-stored copy. |
| US support and payment processors | Not listed | Medium Zendesk, Chargebee, Stripe, and PayPal appear in the public processor list. They should not see zero-access message bodies, but support content and billing data can touch US-group services—document this in DPIAs. |
| Bridge requires paid Mail | Not listed | Low Desktop IMAP/SMTP via Bridge is not available on free accounts. Budget seats for users who refuse the official apps. |
| Hosted service, not self-hosted FOSS mail | Not listed | Medium Open-source clients improve inspectability but you still depend on Proton’s operated backend, uptime, and Swiss legal process. Unsuitable if policy mandates customer-operated mail servers. |
| Swiss legal orders on accessible data | Not listed | Low Transparency reports show thousands of yearly legal orders for Mail with many complied. Bodies stay encrypted; recovery emails, IPs (when retained for abuse), and similar metadata may still be in scope. Align expectations with counsel. |
When: You need zero-access / end-to-end encrypted mailboxes as the primary control
Consider: Proton Mail or Tuta
Different product class: E2EE-first vs conventional managed IMAP hosting
When: You need mail plus full productivity suite and global enterprise ecosystem
Consider: Google Workspace or Microsoft 365
Trade EU-operator focus for suite breadth and US-jurisdiction diligence
When: You want another European professional domain-mail host for comparison
Consider: Migadu, Mailfence, or Combell E-mail
Compare admin model, spam handling, restore RPO, and contract artifacts
When: You want German E2EE email with a different crypto product surface and may not need Proton’s full ecosystem
Consider: Tuta
Compare desktop interoperability and business admin maturity side by side.
When: You want ad-free European mail with strong transport privacy but do not require zero-access E2EE for all stored content
Consider: Posteo
Different threat model: Posteo is privacy-forward without Proton’s zero-access default.
When: You need OpenPGP-centric mail with classic collaboration extras under Belgian operation
Consider: Mailfence
Weigh automatic Proton-to-Proton E2EE UX versus Mailfence’s model.
When: Collaboration suite depth and ecosystem lock-in outweigh encryption defaults
Consider: Google Workspace or Microsoft 365
Accept US-provider jurisdiction and scanning/processing models as tradeoffs.