eclipso Mail Europe vs Soverin

Compare eclipso Mail Europe and Soverin on capabilities, jurisdiction, assurance, and fit for European buyers.

Both listed as alternatives to: Gmail, Microsoft 365, Outlook.com

eclipso Mail Europe

Germany· Email Services

Needs review

Shortlist when you want German-hosted mail with direct IMAP/SMTP, optional OpenPGP/S/MIME free on all tiers, prepaid freemium cost control, and a small business suite (drive, calendar, hybrid SMS/fax/post). Skip when you need zero-access defaults, published ISO/SOC audits, or large-enterprise identity—consider Posteo, Tuta, Proton Mail, or mailbox.org instead.

Germany-hosted (claimed)OpenPGP + S/MIMEIMAP/SMTP nativePrepaid freemiumOwner-operated DEBusiness DPA (Art. 28)

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Soverin

Netherlands· Email Services

Needs review

Shortlist Soverin when you want Dutch-operated, paid IMAP email with custom domains, unlimited aliases, and strong mail-auth standards without Google/Microsoft ads. Skip when you need zero-knowledge E2EE—consider Proton Mail or Tuta instead—or a full productivity suite (mailbox.org / Microsoft 365).

NL / EU operatedCustom domainsIMAP / CalDAVNo ads / no trackingISO 27001 (claimed)DANE / DNSSEC

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Highlighted rows differ between the two products.

eclipso Mail Europe vs Soverin: Snapshot
Feature	eclipso Mail Europe	Soverin
Country of origin	Germany	Netherlands
Category	Email Services	Email Services
Open source	No	No
Self-hosted	No	No
Headquarters	Germany	Netherlands
Legal entity	Claus-Peter Beringer (eclipso Mail Europe), Grubstr. 9b, 95445 Bayreuth	Soverin B.V. (Amsterdam); owned by The Sharing Group / TSG Online (Dutch) as of September 2025 acquisition announcement
Governing law	German / EU law (GDPR, BDSG); BayLDA supervisory authority named in privacy notice	Not listed
US parent / control	No known US parent	No known US parent
CLOUD Act exposure (indicative)	Medium	Low
Hosting / residency	Primary hosting claimed exclusively in Germany; privacy policy names Speedloc Datacenter (Görlitz) with AVV. Optional SMS/fax/post: Commify Germany, CM.com Germany, letterei.de (all DE). Payments: Stripe Payments Europe and PayPal (Europe). Site: Google reCAPTCHA; marketing ad partners documented; Matomo self-hosted analytics.	Vendor: EU-only processing; data in NL; self-operated Dutch DCs, no hyperscaler. TechRadar: 3 NL DCs. Core mail hosts on Soverin B.V. AS211993. External first-line support partner under DPA/NDA (country unpublished). HIBP k-anon password checks; Let’s Encrypt; domain DNSSEC partner. No AWS/GCP/Azure as primary mailbox hosts in public materials.
Summary	Owner-operated German email and cloud suite with IMAP, optional OpenPGP/S/MIME, prepaid freemium, Drive/organizer, and hybrid SMS/fax/post—hosted in Germany.	Dutch privacy-first email hosting: custom domains, open IMAP/SMTP/CalDAV, 25 GB mailboxes, no ads or content scanning, servers operated in the Netherlands.
Tags	email privacy gdpr imap germany openpgp prepaid cloud-storage	email privacy gdpr imap netherlands custom-domain saas

At a glance: eclipso Mail Europe vs Soverin
At a glance	eclipso Mail Europe	Soverin
HQ	Bayreuth, Germany	Amsterdam, Netherlands (Soverin B.V.)
Legal entity	Claus-Peter Beringer (owner-operated)	Not listed
Founded	2003 (vendor)	Not listed
Hosting	Germany; Speedloc Datacenter (Görlitz) named in privacy policy	Dutch data centres; vendor claims self-operated, no hyperscaler
Open source	No	Not listed
Self-hosted	No (SaaS)	Not listed
Commercial model	Freemail (ad-supported) + prepaid paid tiers	Annual prepaid; 30-day mailbox money-back; no free tier
Encryption	Optional OpenPGP + S/MIME; TLS in transit	Not listed
Group	Not listed	The Sharing Group / TSG Online (acq. Sep 2025)
Protocols	Not listed	IMAP, SMTP, CalDAV, CardDAV
Storage	Not listed	25 GB per mailbox (vendor-stated)
Self-host / OSS	Not listed	No / No

Key capabilities: eclipso Mail Europe vs Soverin
Key capabilities	eclipso Mail Europe	Soverin
Germany-hosted (claimed)	Yes	Not listed
OpenPGP + S/MIME	Yes	Not listed
IMAP/SMTP native	Yes	Not listed
Prepaid freemium	Yes	Not listed
Owner-operated DE	Yes	Not listed
Business DPA (Art. 28)	Yes	Not listed
NL / EU operated	Not listed	Yes
Custom domains	Not listed	Yes
IMAP / CalDAV	Not listed	Yes
No ads / no tracking	Not listed	Yes
ISO 27001 (claimed)	Not listed	Yes
DANE / DNSSEC	Not listed	Yes

eclipso Mail Europe

Native OpenPGP and S/MIME in every plan
OpenPGP (RFC 4880/9580) key wizard and import work in webmail and apps, free from Freemail upward; S/MIME accepts user-supplied X.509 certificates for business clients. E2EE only applies when both sides use it—plain IMAP mail is not zero-access by default. Private keys for webmail PGP are held in the account under a passphrase for multi-device use.
Standard IMAP, POP3, SMTP plus CalDAV/CardDAV
Direct protocol access for Thunderbird, Outlook, Apple Mail, and mobile clients without a bridge product. Calendar and contacts sync via CalDAV/CardDAV; Premium and Business add WebDAV for the cloud drive. Suits teams that refuse locked-in web-only mail.
German-hosted suite: mail, drive, organizer
One account covers webmail, eclipso Drive file storage with link sharing, Media Center, calendar, address book, notes, and tasks. Vendor claims exclusive Germany data centres (privacy policy names Speedloc Datacenter, Görlitz). Storage and address limits scale by prepaid tariff; WebDAV and higher quotas need paid tiers.
Prepaid freemium with optional hybrid channels
Freemail signs up without credit card or phone number and is ad-supported; paid Connect/Premium/Business terms are prepaid and end automatically after a reminder. Credits enable SMS, fax, and hybrid physical post through named German gateways—useful for crafts and SMEs still on those channels.
Business domain and Art. 28 DPA on Business plan
Business includes a custom mail domain option, higher alias counts, daily send limits suitable for small campaigns, and an in-product Art. 28 GDPR DPA download per vendor docs. Not a full enterprise workspace: no public SCIM/SSO pack or multi-org admin model documented.

Soverin

Custom domains with unlimited aliases
Host mail on your own domain (bring existing or register through Soverin). Unlimited aliases—plus-addressing or domain names—deliver into one mailbox, plus optional random @sinenomine.email private aliases that hide the real address. Suits freelancers and SMEs who need brandable addresses without per-alias fees.
Open IMAP/SMTP plus CalDAV/CardDAV
Use any standards-based client or device for mail, calendar, and contacts—no proprietary app required. Dashboard import helps migrate from other providers. Ideal when IT wants Thunderbird, Apple Mail, or Outlook without locking into a closed webmail ecosystem; not a zero-knowledge E2EE product by default.
Mail-path security: DANE, DKIM, DMARC, IP stripping
Outbound and inbound paths use TLS; Soverin publishes and honours DANE/TLSA, signs with DKIM, publishes SPF/DMARC, enables DNSSEC on managed domains, and strips personal IP addresses from outbound headers. 2FA is available and can be admin-mandated. Buyers still need their own OpenPGP setup for end-to-end content secrecy with external parties.
25 GB mailboxes with per-user encrypted backups
Each mailbox includes a stated 25 GB quota covering mail, calendar, and contacts. Nightly backups use individually generated keys; Soverin states that emptying trash permanently deletes data and that leaving the service removes backups when the key is destroyed. Extra mailboxes can share storage for small teams.
Multi-mailbox and channel-friendly business use
Purchase and assign additional mailboxes on a domain, with admin tooling for teams. Soverin markets to hosters, ISPs, MSPs, and independent professionals for multi-mailbox and white-label scenarios—useful when you want Dutch-operated email without building your own mail stack.

Assurance & compliance: eclipso Mail Europe vs Soverin
Assurance & compliance	eclipso Mail Europe	Soverin
Independent security / no-logs audit	Not found No public third-party security or no-logs audit PDF located on official pages	Not found No public third-party no-logs or full security audit PDF located; privacy claims are first-party.
ISO 27001	Not found No ISO 27001 claim found on official security/about pages at research time	Vendor claimed Vendor states independently audited ISO 27001; certificates available on request via support@soverin.net. Not re-verified against a public registry entry in this pass.
SOC 2 / SOC 3	Not found No SOC 2/3 report referenced on official site	Not found No SOC 2/3 claim found on primary pages reviewed.
GDPR / EU data protection	Vendor claimed German controller, DPO contact, BayLDA authority, GDPR rights language in privacy policy; servers claimed in Germany	Vendor claimed NL entity; AVG-framed privacy statement; EU-only processing claimed; GDPR Proof messaging on recognitions page.
US CLOUD Act exposure (indicative)	Partial EU/DE owner-operated entity with DE hosting (Speedloc), but Stripe, PayPal, and Google reCAPTCHA/ad tooling introduce US-group processing paths for payment and website data. Not legal advice.	Partial EuropeanStack assessment: low exposure path—Dutch Soverin B.V., Dutch The Sharing Group owner, claimed self-operated NL hosting without public AWS/GCP/Azure mailbox hosts. Partial because residual subprocessors (support partner jurisdiction, domain partners, HIBP hash checks) need buyer confirmation. Not legal advice.
Data processing agreement (B2B)	Vendor claimed Art. 28 DPA described as included and downloadable on Business plan; confirm for lower tiers	Vendor claimed Privacy statement states it qualifies as an Article 28 AVG processing agreement; other DPAs expressly rejected. Confirm signed annex for enterprise use.
EU AI Act	Not applicable Email/cloud suite; not an AI system product	Not applicable Email hosting product; vendor emphasises no AI scanning/mining of mailbox content for ads.
ISO 9001 / ISO 14001	Not listed	Vendor claimed Vendor-claimed quality and environmental certifications; certificates on request.
NIS2 readiness	Not listed	Vendor claimed Vendor markets NIS2 Ready; buyer press also asserts NIS2 compliance—confirm evidence package.
NEN 7510 (healthcare NL)	Not listed	Partial Vendor states NEN 7510 certification is in progress, not completed.

Considerations & known limitations: eclipso Mail Europe vs Soverin
Considerations & known limitations	eclipso Mail Europe	Soverin
Not zero-access by default	Medium Without OpenPGP/S/MIME, mailbox content is accessible to the operator like traditional IMAP hosts. Webmail PGP private keys are stored in-account under a passphrase—review threat model vs pure local keys.	Not listed
US-group payment and site tooling	Medium Stripe, PayPal, Google reCAPTCHA, and documented ad partners process personal data outside pure DE mailbox hosting. Material for CLOUD Act and transfer diligence even if mail servers stay in Germany.	Not listed
No public ISO/SOC or independent audit	Medium Security assurance is first-party documentation only. Regulated buyers will need questionnaires, AVVs, and possibly on-request evidence.	Not listed
Freemail is ad-supported	Low Free tier includes advertising as a service component. Paid tiers are marketed as ad-free; verify current footer/banner behaviour on the live product.	Not listed
Owner-operated scale limits	Low Independent DE operator (not VC-backed hyperscale). Expect SME-grade support hours and product depth rather than global enterprise SLAs.	Not listed
Not zero-knowledge E2EE by default	Not listed	Medium Unlike Proton/Tuta, Soverin is a classic IMAP host. Provider infrastructure can process content for delivery and spam filtering. Practical impact: unsuitable as a drop-in for policies that require provider-blind encryption without extra client crypto.
Unnamed external support partner	Not listed	Medium Privacy statement discloses a first-line support partner with limited account data under DPA/NDA, but does not publish the partner name or country. Practical impact: add an open diligence item for any regulated workload.
ISO certificates not self-serve public	Not listed	Low ISO 27001/9001/14001 are claimed with certificates via support rather than a public PDF registry link found in research. Practical impact: procurement should request current attestations before treating certs as verified.
2025 group acquisition	Not listed	Low The Sharing Group acquisition may change subprocessors, tooling, or brand packaging over time even if continuity is promised. Practical impact: re-check DPA and hosting annex annually.
Email-centric support	Not listed	Low Public materials emphasise human Dutch-team email support; TechRadar notes no live chat or phone. Practical impact: large orgs needing 24/7 phone SLAs may find coverage thin.

Fit

eclipso Mail Europe

Best fit when

Individuals and freelancers who want German mail with Thunderbird/Outlook IMAP and optional OpenPGP without a bridge
SMEs needing a custom domain, German server claims, and an Art. 28 DPA on the Business plan
Buyers who prefer prepaid terms that end automatically over auto-renewing Big Tech suites
Users who still send SMS, fax, or hybrid physical post from the same account
Teams migrating from Gmail/Outlook that value CalDAV/CardDAV and a bundled drive/organizer

Poor fit when

Orgs that require zero-access architecture where the provider never stores decryptable mailbox keys by default
Enterprises needing public ISO 27001/SOC 2 reports, SCIM/SSO, or multi-tenant admin
Buyers who refuse any US-group payment or website tooling (Stripe, PayPal, Google reCAPTCHA/ads)
Users seeking open-source or self-hosted mail only

Consider instead when

When: You want a simple paid-only German privacy mailbox without freemium advertising
Consider: Posteo
Posteo is ad-free paid; eclipso differentiates with freemail and hybrid channels
When: You prioritise always-on encryption over standard IMAP clients
Consider: Tuta or Proton Mail
Tuta uses proprietary E2EE clients; Proton needs Bridge for full IMAP-style access
When: You need a broader paid German workplace suite with stronger enterprise packaging
Consider: mailbox (formerly mailbox.org)
Compare admin, audit, and collaboration depth on current vendor docs
When: You need Google/Microsoft collaboration depth more than EU operator control
Consider: Gmail or Microsoft 365
Different jurisdiction and data-use models

Soverin

Best fit when

Individuals and freelancers who want a paid European mailbox on their own domain with any standard mail client
SMEs needing several mailboxes, aliases, and CalDAV/CardDAV without adopting Google Workspace or Microsoft 365
Teams prioritising Dutch jurisdiction and claimed no-hyperscaler hosting over zero-knowledge E2EE
Hosters/ISPs/MSPs evaluating white-label or multi-mailbox Dutch email
Buyers who value DANE, DKIM/DMARC, DNSSEC, and IP-header stripping on an open-standards stack

Poor fit when

Organisations that require default zero-access / E2EE mail against the provider (use Proton Mail or Tuta)
Users seeking a free tier, anonymous cash-only signup, or purely self-hosted open-source mail servers
Enterprises needing SSO, eDiscovery archives, phone support SLAs, or a full office suite in one vendor
Workloads that depend on US-region mailbox hosting or hyperscale global PoPs

Consider instead when

When: You need zero-knowledge E2EE and a privacy-first mobile/web ecosystem
Consider: Proton Mail or Tuta
Trade open IMAP convenience for stronger default content secrecy vs the provider.
When: You want German-hosted paid mail with broader office-style add-ons
Consider: mailbox.org or Posteo
Compare storage, admin features, and payment anonymity (Posteo) against Soverin’s domain/alias model.
When: You need Google- or Microsoft-class collaboration and global free consumer mail
Consider: Gmail or Microsoft 365 / Outlook.com
Different risk and advertising model; not EU-sovereignty substitutes.

Open questions for due diligence

eclipso Mail Europe

Can non-Business tariffs obtain a signed Art. 28 DPA and full subprocessor list on request?
Is Speedloc the sole host for mailbox content (not only the marketing site), and are backup/DR locations exclusively in Germany?
Are independent penetration tests or ISO plans available under NDA for enterprise buyers?
What exact data minimisation applies to freemail advertising versus paid ad-free tiers (inbox content vs account metadata)?
How are OpenPGP private keys encrypted at rest in the account store, and is export/deletion documented for offboarding?

Soverin

What is the legal name and country of the first-line support partner, and is a current subprocessor list available under NDA?
Can Soverin provide the latest ISO 27001/9001/14001 certificates and scope statements without delay?
After The Sharing Group acquisition, are any new group companies (e.g. Mijndomein, Greenhost, Leafcloud tooling) in the mailbox data path?
Is NEN 7510 certification complete for healthcare use cases, or still in progress?
Which domain registrar(s) handle customer DNSSEC, and where are registry data stored?