Proton Mail vs RAIDBOXES Emails

Compare Proton Mail and RAIDBOXES Emails on capabilities, jurisdiction, assurance, and fit for European buyers.

Both listed as alternatives to: Gmail, Google Workspace, Microsoft 365

Proton Mail

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.

E2EE + zero-accessSwiss-operatedBridge (IMAP/SMTP)Open-source clientsISO 27001 & SOC 2 (claimed)Public B2B DPA

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RAIDBOXES Emails

Germany· Email Services

Needs review

Shortlist when you already (or will) host the domain and WordPress stack at RAIDBOXES and need practical multi-mailbox domain email under a German operator with an online DPA. Skip when you need multi-domain density, default E2EE, or email fully independent of a hoster—consider Migadu, Tuta, Posteo, or mailbox.org instead.

German operatorIMAP / SMTPMail Hosting 2.0Online DPAWordPress-adjacentOptional PGP

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Highlighted rows differ between the two products.

Proton Mail vs RAIDBOXES Emails: Snapshot
Feature	Proton Mail	RAIDBOXES Emails
Country of origin	Switzerland	Germany
Category	Email Services	Email Services
Open source	No	No
Self-hosted	No	No
Headquarters	Switzerland	Germany
Legal entity	Proton AG, Route de la Galaise 32, 1228 Plan-les-Ouates, Geneva, Switzerland (EU representative: Proton Europe sàrl, Luxembourg)	Raidboxes GmbH, Hafenstraße 32, 48153 Münster (Amtsgericht Münster HRB 16184)
Governing law	Swiss law (Terms; Geneva courts for business/non-US consumer disputes as stated in Terms)	German law (company domicile Münster)
US parent / control	No known US parent	No known US parent
CLOUD Act exposure (indicative)	Medium	Medium
Hosting / residency	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.	Email: vendor claims exclusive German data centres and first-party Mail Hosting 2.0 infrastructure (IMAP/SMTP on securemail.pro hostnames); privacy policy still names Heinlein Hosting/mailbox.org under paid email boxes (possible legacy lag). Platform/website: AWS EMEA SARL and DigitalOcean listed for web hosting of the online offer; US-group SaaS includes Intercom, Calendly, Chargebee, Sentry, Google analytics/ads, Mailgun, and others for support, billing, and marketing.
Summary	Swiss end-to-end encrypted email from Proton AG: zero-access inbox storage, open-source clients, custom domains, and Bridge for desktop IMAP clients.	German domain email hosting from Raidboxes GmbH (Münster): Mail Hosting 2.0 with IMAP/SMTP, multi-mailbox plans, optional PGP, and dashboard fit for WordPress agencies—domain must be hosted at RAIDBOXES.
Tags	privacy encryption e2ee switzerland business free-tier saas open-source-clients	privacy gdpr email-hosting wordpress germany business-email imap

At a glance: Proton Mail vs RAIDBOXES Emails
At a glance	Proton Mail	RAIDBOXES Emails
HQ	Plan-les-Ouates (Geneva), Switzerland	Münster, Germany
Legal entity	Proton AG (CHE-354.686.492); Proton Foundation supervision	Raidboxes GmbH (HRB 16184)
Hosting model	Proton-owned hardware in Switzerland (vendor claim)	Not listed
Self-host	No (SaaS); clients open source	Not listed
Commercial model	Freemium + paid consumer and business seats	Not listed
Bridge	Paid plans that include Mail	Not listed
Group	Not listed	team.blue (Belgium) since 2022
Product	Not listed	Mail Hosting 2.0 domain email
Access	Not listed	IMAP / SMTP + webmail
Domain constraint	Not listed	Domain hosted at RAIDBOXES for new mailboxes
Open source	Not listed	No
Self-hosted	Not listed	No

Key capabilities: Proton Mail vs RAIDBOXES Emails
Key capabilities	Proton Mail	RAIDBOXES Emails
E2EE + zero-access	Yes	Not listed
Swiss-operated	Yes	Not listed
Bridge (IMAP/SMTP)	Yes	Not listed
Open-source clients	Yes	Not listed
ISO 27001 & SOC 2 (claimed)	Yes	Not listed
Public B2B DPA	Yes	Not listed
German operator	Not listed	Yes
IMAP / SMTP	Not listed	Yes
Mail Hosting 2.0	Not listed	Yes
Online DPA	Not listed	Yes
WordPress-adjacent	Not listed	Yes
Optional PGP	Not listed	Yes

Proton Mail

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.

RAIDBOXES Emails

Mail Hosting 2.0 on RAIDBOXES infrastructure
IMAP/SMTP mailboxes on dedicated hostnames (mail-rb.securemail.pro / smtp-rb.securemail.pro) after the move off the prior mailbox.org cooperation. Vendor claims German data-centre locations and triple-redundant mail servers. Best for teams that want domain mail under the same German WordPress host rather than a separate privacy-mail brand.
Multi-mailbox plans with aliases, forwards, and catch-all
Tiered plans allocate a fixed number of mailboxes and a shared storage pool, plus per-mailbox alias and forwarding quotas, autoresponders, and catch-all (requires a dedicated catch-all mailbox). One connected domain per plan—confirm multi-domain needs before shortlisting.
Spam/virus filters, TLS, optional PGP, ad-free inboxes
All plans include spam and virus filtering, SSL/TLS for transfer, a blacklist checker, webmail, and ad-free inboxes. PGP is optional rather than default end-to-end encryption for every message—teams that need mandatory E2EE workflows should evaluate Tuta or a full mailbox.org stack instead.
Dashboard-adjacent domain and WordPress ops
Mailboxes are ordered from the RAIDBOXES dashboard and are intended to sit next to WordPress hosting and domain management. New RAIDBOXES mailboxes require the domain to be hosted with RAIDBOXES; legacy mailbox.org-linked domains follow a separate migration path documented in the help centre.
Online B2B DPA and German operator
Raidboxes GmbH (Münster) offers an online data processing agreement (AV contract) with technical-organisational measures. Useful for agencies that already sign a DPA for WordPress hosting and want the same counterparty for domain email—still review TOMs and subprocessor scope for mailbox vs platform tooling.

Assurance & compliance: Proton Mail vs RAIDBOXES Emails
Assurance & compliance	Proton Mail	RAIDBOXES Emails
Independent security / client audits	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.	Not found No public third-party security or no-logs audit report found for RAIDBOXES Emails on primary pages.
ISO 27001	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.	Not found No company-wide ISO 27001 certificate for Raidboxes GmbH found on product/security pages; AWS region ISO mentions are not RAIDBOXES certs.
SOC 2 / SOC 3	Vendor claimed Vendor announces first SOC 2 Type II attestation (July 2025 blog). Report typically under NDA—request from vendor for diligence files.	Not found No public SOC 2/3 report located for RAIDBOXES Emails.
GDPR / EU data protection	Vendor claimed Swiss controller/processor with EU representative; public DPA; GDPR materials for business. Adequacy/transfer mechanisms documented for non-adequate destinations.	Vendor claimed German controller (Raidboxes GmbH); product claims DE server locations and GDPR-aligned deletion; online DPA available. Confirm active mail stack vs privacy-policy mailbox.org listing.
US CLOUD Act exposure (indicative)	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.	Partial EU/German entity, no known US parent (team.blue BE group). Medium residual exposure via US-group platform subprocessors (AWS/DigitalOcean for online offer hosting; Intercom, Chargebee, Google tooling, Mailgun, etc.). Mail content path claimed DE-only. Not legal advice.
Data processing agreement (B2B)	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.	Vendor claimed Online AV/DPA flow at raidboxes.io/en/dpa/ and DocuSign TOM path documented in help centre.
EU AI Act	Not applicable Core product is encrypted email. Optional Scribe assistant is ancillary; not an AI-centric offering for this catalog entry.	Not applicable Domain email hosting product, not an AI system offering.
B Corp certification	Not listed	Vendor claimed Raidboxes GmbH listed as Certified B Corporation on B Lab directory; impact certification, not an information-security audit.

Considerations & known limitations: Proton Mail vs RAIDBOXES Emails
Considerations & known limitations	Proton Mail	RAIDBOXES Emails
Weaker defaults outside Proton	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.	Not listed
US support and payment processors	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.	Not listed
Bridge requires paid Mail	Low Desktop IMAP/SMTP via Bridge is not available on free accounts. Budget seats for users who refuse the official apps.	Not listed
Hosted service, not self-hosted FOSS mail	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.	Not listed
Swiss legal orders on accessible data	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.	Not listed
Domain must be hosted at RAIDBOXES	Not listed	Medium New mailboxes require the domain on RAIDBOXES. That is convenient for WP customers and a lock-in factor if you only wanted independent mail.
One connected domain per plan	Not listed	Medium Multi-domain operators need multiple plans or another provider; not a Migadu-style multi-domain account model.
PGP optional, not default E2EE	Not listed	Medium Threat models that assume provider-side unreadability by default are a better fit for Tuta or similar products.
US-group platform subprocessors	Not listed	Medium Privacy policy discloses AWS EMEA, DigitalOcean, Intercom, Chargebee, Google tools, Mailgun, and others for website/support/billing/marketing—even while email marketing claims German mail servers. Scope diligence to mailbox vs platform data paths.
Privacy policy may lag Mail Hosting 2.0	Not listed	Low §Email box still lists mailbox.org/Heinlein while marketing claims first-party hosting—confirm live stack and subprocessor annex for your contract.
No public ISO/SOC/mail audit	Not listed	Medium B Corp is not a security certification. Enterprise security questionnaires may need NDA materials or alternative providers with published audits.

Fit

Proton Mail

Best fit when

Teams that need default end-to-end / zero-access encryption without running their own mail stack
Orgs that want Swiss legal venue and documented resistance to direct foreign data demands
Businesses migrating branded domains off Gmail/Outlook with Easy Switch and Bridge for desktop holdouts
Security-conscious professionals who value open-source clients, published audits, and hardware-key 2FA
Buyers who need a public DPA plus vendor-claimed ISO 27001 / SOC 2 Type II for questionnaires

Poor fit when

Fully self-hosted requirements (Proton Mail is SaaS; clients are open source, not a full on-prem mail server)
Desktop IMAP on free accounts only—Bridge needs a paid plan that includes Mail
Workflows that depend on unencrypted-looking mail to external parties who will not use password links or PGP
Teams that primarily need full Microsoft 365 / Google Workspace collaboration depth rather than encrypted mail first

Consider instead when

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.

RAIDBOXES Emails

Best fit when

WordPress agencies and freelancers standardising on RAIDBOXES for sites, domains, and mail admin
SMEs wanting professional multi-mailbox domain email with standard IMAP clients—not a full Google/Microsoft suite
Teams that need catch-all, aliases, forwards, autoresponders, and ad-free inboxes on one domain
Buyers who require a German legal counterparty and an online B2B DPA for processor agreements
Operators migrating off legacy mailbox.org-linked RAIDBOXES mail toward first-party Mail Hosting 2.0

Poor fit when

Multi-domain mail estates that need many domains under one contract (one connected domain per plan)
Policies requiring default end-to-end encryption for all mail (PGP is optional only)
Buyers who refuse any coupling between mailbox service and domain/WordPress hosting
Teams seeking a full office suite (Drive, collaborative docs, built-in video) rather than domain mail
Procurement that demands public ISO 27001/SOC 2 or independent no-logs audit reports for the mail product

Consider instead when

When: You need multi-domain, usage-based professional mail without WordPress host lock-in
Consider: Migadu
Swiss-operated, standards-based hosting priced by quotas rather than per-domain WordPress adjacency
When: You need default E2EE and a privacy-first client model
Consider: Tuta
Different threat model; less IMAP flexibility than RAIDBOXES
When: You want privacy-oriented German personal/business mail without hosting coupling
Consider: Posteo or mailbox (formerly mailbox.org)
mailbox is also the former RAIDBOXES mail partner and a deeper digital-workplace option
When: You need Google/Microsoft suite collaboration, not just domain mailboxes
Consider: Google Workspace or Microsoft 365
US Big Tech residency and CLOUD Act profile differ sharply—use only if suite features dominate

Open questions for due diligence

Proton Mail

What exact data-center sites and any non-Swiss regions apply to your tenant’s mailbox replicas today?
Will Proton provide the full SOC 2 Type II report under NDA and confirm ISO 27001 certificate scope/expiry for your questionnaire?
For business orgs: which users will be private vs non-private, and how will admin recovery work with zero-access constraints?
Which external partners must receive E2EE content, and will they accept password-protected messages or PGP?

RAIDBOXES Emails

For a new Mail Hosting 2.0 mailbox, is mailbox.org/Heinlein still a subprocessor for mailbox content, or only a legacy path?
Which German data-centre operators and exact regions host mail storage and backups (primary + DR)?
Does the standard DPA/TOM annex explicitly cover email hosting subprocessors separately from WordPress hosting?
What are published RPO/RTO and restore procedures for mailbox backups?
Are there any upcoming multi-domain plan options or reseller mail SKUs?