GMX Mail vs Migadu

Compare GMX Mail and Migadu on capabilities, jurisdiction, assurance, and fit for European buyers.

Both listed as alternatives to: Gmail, Zoho Mail

GMX Mail

Germany· Email Services

Needs review

Shortlist GMX Mail for consumer or light-professional freemail when you want a German United Internet operator, claimed German mailbox data centers, large free storage, and standard IMAP/POP—with optional OpenPGP. Skip when you need zero-access encryption by default, enterprise DPA/audit packs, or an ad-free architecture as the baseline; consider Proton Mail instead.

German operatorMailbox in DE (claimed)IMAP / POP3 / SMTPOptional OpenPGPFree ad-supportedSaaS only

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Migadu

Switzerland· Email Services

Needs review

Shortlist Migadu when you need Swiss-operated, standards IMAP/SMTP hosting with unlimited addresses across many domains under flat account quotas—especially agencies and multi-domain SMEs. Skip when you need provider E2EE defaults, contractual SLA on the default offer, mailbox 2FA, or bulk/transactional sending; consider Proton Mail/Tuta for E2EE, or mailbox.org/Mailfence/Posteo/Runbox for other European professional-mail tradeoffs.

Swiss operatorUsage-priced multi-domainSMTP/IMAP/POP3Mail hosted in FranceMulti-admin + APINo ads / no tracking

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Highlighted rows differ between the two products.

GMX Mail vs Migadu: Snapshot
Feature	GMX Mail	Migadu
Country of origin	Germany	Switzerland
Category	Email Services	Email Services
Open source	No	No
Self-hosted	No	No
Headquarters	Germany	Switzerland
Legal entity	1&1 Mail & Media GmbH (Zweigniederlassung Karlsruhe; Hauptsitz Montabaur)	Migadu-Mail GmbH
Governing law	German law (international T&Cs); GDPR applies as EU controller	Canton of Appenzell Ausserrhoden, Swiss Confederation (terms)
US parent / control	No known US parent	No known US parent
CLOUD Act exposure (indicative)	Medium	Medium
Hosting / residency	Vendor privacy (EN): FreeMail emails, address book, and calendar processed in secure data centers in Germany. Product security pages: European data centers for stored mail. Group United Internet AG (DE). Named non-mail paths: Google Analytics/GTM on portal; Google/Yahoo search partnership; international ad partners under consent; DE privacy allows third-country transfers with Chapter V safeguards when used. No public exhaustive mail-infra subprocessor list found.	Mail servers stated in France (EU). Payment subprocessors Stripe and PayPal (US) for billing data. Full mail infrastructure/backup subprocessor list not published by name on primary pages.
Summary	German FreeMail from 1&1 Mail & Media GmbH (United Internet): large free storage, IMAP/POP/SMTP, optional OpenPGP and 2FA, ad-supported consumer webmail.	Swiss-operated, standards-based email hosting for custom domains: unlimited addresses and multi-domain accounts priced by usage quotas, not per mailbox.
Tags	freemail webmail germany imap openpgp united-internet ad-supported consumer	privacy saas api email-hosting standards-based multi-domain

At a glance: GMX Mail vs Migadu
At a glance	GMX Mail	Migadu
HQ / entity	1&1 Mail & Media GmbH, Montabaur (DE)	Migadu-Mail GmbH, Switzerland
Parent group	United Internet AG (DE)	Not listed
Product type	Consumer FreeMail + optional paid tiers	Not listed
Hosting (claimed)	Mailbox/calendar data in German data centers	Not listed
Protocols	Webmail; POP3/IMAP/SMTP (opt-in)	Not listed
Open source	No	Not listed
Self-hosted	No	Not listed
Founded	Not listed	2014 (vendor About)
Mail hosting	Not listed	Data centers in France (vendor Pro/Cons)
Commercial model	Not listed	Flat per-account plans by daily message quotas + soft storage
Open source product?	Not listed	No — built on open-source stack; service is proprietary SaaS
Self-host	Not listed	No
Ownership	Not listed	Bootstrapped; no outside capital (vendor claim)

Key capabilities: GMX Mail vs Migadu
Key capabilities	GMX Mail	Migadu
German operator	Yes	Not listed
Mailbox in DE (claimed)	Yes	Not listed
IMAP / POP3 / SMTP	Yes	Not listed
Optional OpenPGP	Yes	Not listed
Free ad-supported	Yes	Not listed
SaaS only	Yes	Not listed
Swiss operator	Not listed	Yes
Usage-priced multi-domain	Not listed	Yes
SMTP/IMAP/POP3	Not listed	Yes
Mail hosted in France	Not listed	Yes
Multi-admin + API	Not listed	Yes
No ads / no tracking	Not listed	Yes

GMX Mail

Large free mailbox storage with open protocols
gmx.com free accounts advertise up to 65 GB email storage and 50 MB attachments. POP3, IMAP, and SMTP are supported after you enable them in settings (TLS 1.2+; imap.gmx.com / mail.gmx.com). Suits users who want client choice (Thunderbird, Outlook, mobile) without Google or Microsoft as the mailbox host.
Optional OpenPGP end-to-end encryption (Mailvelope)
GMX offers free OpenPGP messaging via the Mailvelope browser extension: key generation, local key storage, key directory, and mobile recovery. Encryption is opt-in per message after setup—not whole-mailbox zero-access by default. Best for occasional sensitive threads when both parties can use OpenPGP.
Aliases, Mail Collector, and multi-account inbox
Create up to 10 alias addresses (including other GMX domains) managed in one inbox, and pull up to 10 external accounts via Mail Collector. Useful for freelancers and project mail without juggling multiple passwords or providers day-to-day.
Spam filtering, antivirus, and optional TOTP 2FA
Free accounts include automated spam filtering (user blacklist and optional improved detection) and antivirus scanning of mail and cloud files. Optional two-factor authentication uses an authenticator app (TOTP); third-party clients use app-specific passwords when 2FA is on.
Bundled Cloud, calendar, contacts, and Online Office
Accounts include contacts, calendar/organizer, about 2 GB GMX Cloud with share links, and Online Office for common document formats—enough for light personal productivity without a separate suite subscription.

Migadu

Usage-metered accounts with unlimited addresses
Plans are flat per Migadu account. Within daily in/out quotas and soft storage guidance, create large numbers of mailboxes and host many domains without per-address fees—useful for agencies and multi-project teams. Soft storage does not hard-bounce mail; sustained over-quota use can force upgrades or limits.
Standards SMTP, IMAP4, POP3, and webmail
No proprietary client protocol. Connect Thunderbird, Apple Mail, Outlook, mutt, and others over TLS (typical endpoints imap.migadu.com:993, smtp.migadu.com:465, pop.migadu.com:995). ManageSieve filtering, aliases, pattern rewrites, identities, footers, auto-responders, and optional catch-alls cover classic postmaster needs. Data remains portable via standard protocols.
Multi-domain admin, multi-admin, and beta API
Agencies can hold many client domains under one roof, open multiple administrators (domain-scoped on higher plans), set per-domain/mailbox limits, and monitor traffic. A REST API (documented as early beta) manages domains, mailboxes, identities, forwardings, aliases, and rewrites for automation. Domain deletion stays UI-only as a safety measure.
DNS helpers and postmaster-style support
Optional built-in DNS ships mail records preconfigured; Migadu also offers DNS setup help at no extra fee and publishes diagnostics/activation flows. Support is ticket-based from people who operate the mail stack—not outsourced chat—with plan-dependent urgency outside office hours.
No ads, no product analytics cookies
Vendor policy states no advertising, no tracking of mailbox content for ads, and no website analytics cookies beyond session needs. Processing is framed for service delivery, abuse prevention, and legal obligations. Payment data still goes to Stripe and PayPal under separate processor terms.

Assurance & compliance: GMX Mail vs Migadu
Assurance & compliance	GMX Mail	Migadu
Independent security / no-logs audit	Not found OpenPGP/Mailvelope path described as externally reviewed; no public independent no-logs audit for FreeMail mailbox access found on product pages.	Not found Vendor claims no ad scanning/sharing of mail content; no public third-party audit PDF located.
ISO 27001	Not found No GMX FreeMail-branded ISO 27001 certificate located on security/privacy pages in this research pass (group companies may hold certs under other brands).	Not found Data centers described as internationally certified; no Migadu-organization ISO 27001 certificate found on primary pages.
SOC 2 / SOC 3	Not found No SOC 2/3 report found on GMX public security pages.	Not found
GDPR / EU data protection	Vendor claimed EU/German controller; public privacy notices under GDPR; DPO published; supervisory authorities named (BfDI / LfDI RLP).	Vendor claimed Privacy policy asserts GDPR and Swiss DPA compliance; mail hosted in France per vendor.
US CLOUD Act exposure (indicative)	Partial German entity and parent (United Internet AG); mailbox data claimed in German DCs. Partial/medium because portal analytics include Google LLC tools, freemail ads involve international partners, and no full public mail-infra subprocessor list. Not legal advice.	Partial Swiss entity, no known US parent, mail in France; Stripe and PayPal process payments with US transfers. Infrastructure subprocessors not fully named. EuropeanStack assessment—not a vendor certification. Not legal advice.
Data processing agreement (B2B)	Not found Product is primarily consumer FreeMail under GTCs/privacy policy; no public self-serve B2B DPA flow found for FreeMail shortlisting.	Vendor claimed Privacy page states it serves as privacy policy and DPA; confirm suitability with counsel.
EU AI Act	Not applicable Not an AI-centric product; optional assistive features may appear in product privacy text but FreeMail is not marketed as an AI system.	Not applicable Email hosting product; not an AI system offering.

Considerations & known limitations: GMX Mail vs Migadu
Considerations & known limitations	GMX Mail	Migadu
Advertising-funded free tier	Medium FreeMail depends on ads and (with consent) interest-based targeting and partner sharing. Privacy posture differs from paid privacy mail. Practical impact: expect consent UX, ad surfaces, and partner lists—not a zero-ads default.	Not listed
E2E encryption is optional, not default	Medium Without OpenPGP setup, mailbox content is accessible to the provider like conventional hosted mail. Practical impact: do not treat GMX FreeMail as zero-access encryption architecture.	Not listed
Incomplete public infrastructure subprocessors	Medium Residency for mail is claimed (Germany/EU), but there is no enterprise-style published subprocessor inventory for core mail infrastructure. Portal paths name Google Analytics and global ad partners. Practical impact: extra questionnaire work for high-assurance buyers.	Not listed
Inactivity and freemail operational policies	Low Terms/privacy allow deletion of free mailbox content after prolonged inactivity (about 180 days without login on FreeMail privacy text). Practical impact: inactive project addresses can disappear if not maintained.	Not listed
No public ISO/SOC package for FreeMail	Low Security pages emphasize product features (spam, AV, 2FA, PGP) rather than downloadable ISO/SOC evidence for FreeMail. Practical impact: may fail enterprise vendor security questionnaires without further vendor dialogue.	Not listed
US payment subprocessors (Stripe, PayPal)	Not listed	Medium Billing-related personal data can transfer to US processors under Migadu’s privacy policy. Mail content path is France/EU per vendor, but payment data is a separate CLOUD Act / transfer surface.
Incomplete public infrastructure subprocessor list	Not listed	Medium Primary pages name France hosting and certified DCs without a full vendor inventory for compute, storage, and backups. Procurement should request the current list and regions in writing.
No E2EE product default; no classic mailbox 2FA	Not listed	Medium Standards mail with TLS; vendor recommends user-side OpenPGP for strong content secrecy. IMAP 2FA is not offered; app-specific-style identities are not second-factor MFA.
Daily quotas and human-mail policy	Not listed	Medium Account-wide daily in/out caps and anti-bulk rules make Migadu unsuitable as a transactional/marketing ESP. Over-limit mail can be deferred or rejected after tolerance.
No default SLA on standard plans	Not listed	Low Vendor states standard offers lack SLAs; email is treated as asynchronous and occasionally disrupted. Enterprise SLA only via separate commercial discussion.
No public independent security audit	Not listed	Medium Privacy and no-ad-scanning claims are first-party. No independent audit report found for no-logs or security controls.

Fit

GMX Mail

Best fit when

Individuals and freelancers who want a European freemail address with large free storage and IMAP client freedom
Users consolidating multiple addresses via aliases (up to 10) and Mail Collector
Buyers who prefer a German legal controller (1&1 Mail & Media GmbH / United Internet) over US Big Tech freemail
Teams that only need optional OpenPGP for specific sensitive threads, not zero-access by default
Users already familiar with GMX/WEB.DE in German-speaking markets who need international domains (e.g. gmx.com)

Poor fit when

Organizations that require default end-to-end / zero-access encryption for all mail
Procurement that needs a published independent security audit pack, ISO/SOC evidence, and a B2B DPA as standard shortlist inputs
Teams that cannot accept advertising-funded freemail economics or interest-based ad consent UX
Custom-domain corporate mail and admin controls at Microsoft 365 / Google Workspace depth
Self-hosted or open-source mail stack requirements

Consider instead when

When: You need zero-access encryption by default and a privacy-first paid model without ad-funded freemail as the core product
Consider: Proton Mail
Proton is the stronger shortlist peer in this catalog for E2E-first evaluation.
When: You need Google Workspace-class collaboration and are willing to accept US Big Tech jurisdiction
Consider: Gmail / Google Workspace
Richer suite integration; different sovereignty and ad/ecosystem tradeoffs.
When: You need Microsoft ecosystem mail, calendar, and compliance tooling
Consider: Outlook.com / Microsoft 365
Strong enterprise admin story; US parent and CLOUD Act path differ from GMX.

Migadu

Best fit when

Agencies and freelancers hosting many client domains under one account with multi-admin or API provisioning
Organizations that want custom-domain mail with standard clients and portable IMAP—not a proprietary suite lock-in
Teams tired of per-seat pricing for large address spaces with modest real traffic
Buyers who value a small bootstrapped Swiss operator that publishes blunt product limits
Setups that need aliases, rewrites, identities, SIEVE, and postmaster-style controls more than collab apps

Poor fit when

Primary need is end-to-end encrypted mail by default (Proton Mail, Tuta, or user-side OpenPGP workflows)
High-volume transactional, marketing, or bulk outbound mail
Requirement for default contractual SLA, phone support, or multi-language admin UI
Mandatory mailbox 2FA on every IMAP login
Want a free long-term plan or Migadu-branded @provider addresses without owning a domain

Consider instead when

When: You need provider-managed end-to-end encryption as the default product promise
Consider: Proton Mail or Tuta
Migadu is standards hosting with TLS; content secrecy against the operator is not the design center.
When: You want another European professional host with a different admin/encryption/residency package
Consider: mailbox.org, Mailfence, Posteo, or Runbox
Compare DPA detail, audit packaging, and whether multi-domain usage pricing still wins for your address sprawl.
When: You need full workspace suite (docs, meet, identity) rather than email hosting alone
Consider: Google Workspace, Microsoft 365, or Infomaniak-style European suites
Migadu deliberately stays postmaster-focused.
When: You need bulk or high-rate application email
Consider: A dedicated ESP (not Migadu); Amazon SES is the common Big Tech baseline—pair with EU ESPs if residency matters
Migadu rate-limits and bans intentional bulk use.

Open questions for due diligence

GMX Mail

Will 1&1 Mail & Media sign a B2B DPA and publish a current mail-infrastructure subprocessor list for our use case?
Are FreeMail mailbox systems solely on United Internet / 1&1 operated German DCs, or are any US-group cloud providers used for primary storage, backup, or DR?
What independent audits or certifications (if any) cover the FreeMail platform beyond the Mailvelope/OpenPGP path?
For paid/premium mailboxes: which advertising and tracking paths remain, and what contractual residency language is available?

Migadu

What are the current named mail hosting, backup, and ancillary subprocessors and their countries?
Can Migadu provide ISO/SOC evidence for the organization or only DC-level certifications?
Is an independent security or penetration-test summary available under NDA?
Does the privacy-page DPA meet your controller’s mandatory clauses without a separate signed agreement?
What encryption-at-rest and key-management practices apply today versus the older public pro/con narrative?