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Infomaniak kMail

Swiss-hosted professional email, contacts and calendars from Infomaniak Network SA—custom domains, open protocols, optional encryption, part of kSuite.

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Infomaniak kMail is the email, contacts, and calendar stack from Infomaniak Network SA, a Swiss cloud operator based in Geneva. It is the messaging layer of kSuite: webmail, IMAP/SMTP and CalDAV/CardDAV for desktop clients, and native iOS and Android apps whose client code is published under GPL-3.0.

It exists for professionals who want custom-domain Swiss-hosted mail with open protocols and optional encryption, without running their own mail servers. The backend is Infomaniak-hosted SaaS only.

The concrete differentiator is that Swiss data-centre operation plus daily backups and restores typically available for about 30 days, inside the wider kSuite account.

Swiss-hosted mailCustom domainsIMAP / CalDAVOSS mobile clientsISO 27001 (claimed)Optional send encryption

Shortlist when you need Swiss-hosted professional email with custom domains, IMAP/CalDAV, suite bundling (kSuite), and operator-owned DCs. Skip when zero-access client-side E2EE or full self-host is mandatory—consider Proton Mail (E2EE) or a self-hosted stack instead.

Key capabilities

Host name@your-domain addresses with standard IMAP/SMTP plus CalDAV/CardDAV so Thunderbird, Apple Mail, Outlook and other clients stay usable. Paid kSuite/Mail Service tiers add multi-mailbox management, aliases/categories, signatures and team admin; free my kSuite is limited to one address without aliases.

Optional encryption at send uses OpenPGP, ECC and AES-256-GCM; Infomaniak-to-Infomaniak is automatic after auth, while external recipients often open a password-protected secure page. Private keys stay on Infomaniak infrastructure—useful for sensitive sends, but not zero-access client-side E2EE with user-held keys.

Official iOS and Android mail apps are published on GitHub under GPL-3.0 for local inspection and contribution. The hosted mail backend remains Infomaniak SaaS only—there is no supported self-hosted server stack for kMail.

Mailboxes are backed up across Swiss data centres with vendor-stated restore windows around 30 days; anti-spam/antivirus plus domain authentication (SPF, DKIM, DMARC) are standard. Availability claims (e.g. high uptime for essential services) should be checked against the current SLA for your plan.

In-product AI can help draft, correct, translate and process mail context; Infomaniak states messages sent to its AI are processed in Switzerland and not stored for other purposes. Treat AI features as operator-side processing of content you choose to submit—not as end-to-end private AI.

At a glance

HQ
Geneva, Switzerland (Les Acacias)
Legal entity
Infomaniak Network SA
Hosting
Own Swiss data centres; dual-site mailbox backups
Open source
Mobile clients GPL-3.0; backend SaaS
Self-host
No (hosted only)
Commercial model
Free my kSuite tier; paid kSuite / Mail Service seats

Best fit when

  • SMEs and associations wanting Swiss-hosted name@domain email with standard IMAP clients
  • Teams that prefer an integrated kSuite workspace (mail + drive + meet) under one Swiss operator
  • Orgs that need a published B2B DPA, dual-site Swiss backups, and SPF/DKIM/DMARC on domains
  • Buyers who value open-source mobile clients even if the mail backend is SaaS-only
  • Individuals in OECD countries open to free my kSuite with known feature and residency limits

Poor fit when

  • Requirements for default zero-access E2EE with user-held keys on every message
  • Need to self-host the mail server stack (kMail is SaaS-only)
  • French HDS health-data hosting (vendor states HDS certification is not planned)
  • Free-tier signup outside OECD residency / without mobile verification
  • Very large estates that need more than kSuite's published per-offer user ceiling without a custom deal

Consider instead when

  • When: You need zero-access end-to-end encryption as the default mail model

    Consider: Proton Mail

    Different trust model: client-side E2EE vs Infomaniak operator-held keys for optional encryption

  • When: You want European hosted mail with a different encryption or non-profit posture

    Consider: Mailfence or Posteo

    Compare encryption UX, storage model, and commercial terms on each vendor site

  • When: You need full control of the MTA and storage stack

    Consider: Self-hosted mail (e.g. mailcow/Stalwart) or a host that publishes server software

    Infomaniak mobile apps are OSS; the hosted service is not self-hostable

Jurisdiction & ownership

Legal entity
Infomaniak Network SA (Rue Eugène Marziano 25, 1227 Les Acacias, Geneva; CH-660.0.059.996-1; IDE CHE-103.167.648)
US parent / control
No known US parent
CLOUD Act exposure (indicative)
Low
Hosting / residency
Primary mail hosting on Infomaniak-operated Swiss data centres (Geneva/Zurich region; Swiss Hosting label claimed); dual-DC backups in Switzerland. Confidentiality policy names payment partners (e.g. PayPal, Checkout) and other ancillary third parties for account/billing/measurement—not AWS/GCP/Azure as primary mail hosts in public materials.

No known US corporate parent; foundation/employee ownership narrative on About pages. CLOUD Act score is indicative for mailbox content under Swiss operator + own DCs; billing and marketing subprocessors still create third-party surfaces. Not legal advice.

  • Independent security / no-logs auditNot found
  • ISO 27001Vendor claimed
  • SOC 2 / SOC 3Not found
  • GDPR / EU data protectionVendor claimed
  • +3

Considerations & known limitations

  • MediumEncryption is not zero-access by default

    Optional send encryption keeps private keys on Infomaniak infrastructure. Operators with warrant or insider access to the platform may still access unencrypted stored mail. Practical impact: do not treat kMail as a zero-knowledge vault for all messages.

  • LowSaaS-only mail backend

    No official self-host for the mail service; exit means IMAP export/migration. OSS clients do not equal portable server stack.

  • LowFree tier residency and feature caps

    my kSuite requires OECD residency and phone verification; no aliases, limited storage, enforced free signature. Unsuitable as free global professional mail.

  • LowLimited public mail-path subprocessor table

    Hosting is own Swiss DCs per vendor docs; confidentiality policy lists payment and marketing-class third parties. Procurement should request a current subprocessor list for mailbox content paths.

  • MediumNo HDS health-hosting cert

    Vendor FAQ states French HDS certification is not planned—material for French health-sector workloads.

Open questions for due diligence

  • Request the current subprocessor list scoped to Infomaniak Mail mailbox content (not only account billing).
  • Confirm whether optional encryption is fully rolled out on mobile apps for your required clients.
  • Validate seat ceilings, SLA, and restore RPO/RTO against your RTO targets for the chosen kSuite/Mail plan.
  • For regulated sectors: map FADP/GDPR DPA clauses and any sector addenda (FINMA mapping exists; HDS does not).
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Frequently Asked Questions

Not by default. Standard mail is hosted on Infomaniak's Swiss infrastructure with optional one-click encryption at send (OpenPGP/ECC/AES). Infomaniak states private keys remain on its systems; external recipients may use a passworded secure reading page. Choose Proton Mail or similar if zero-access client-side E2EE with user-controlled keys is a hard requirement.

SaaS only for the mail service. Mobile clients are open source (GPL-3.0), but Infomaniak does not offer an official self-hosted kMail server. If you need full control of the MTA stack, look at self-hosted stacks or providers that publish server software.

Infomaniak Network SA (Geneva) states customer service data is hosted on its own Swiss data centres with dual-site backups in Switzerland and Swiss Hosting labelling. A downloadable B2B Data Processing Agreement is published from the trust centre. Confirm current DPA terms and any plan-specific subprocessors in procurement.

Free my kSuite is aimed at individuals: limited email storage (vendor documents 20 GB for mail on free), one address per account, no aliases, enforced free-tier signature branding, OECD residency, and mobile number verification—among other daily send and feature caps. Paid kSuite or Mail Service is the path for custom domains, multi-user admin and higher limits.

Gmail/Google Workspace wins on global ecosystem integrations and familiarity; Infomaniak competes on Swiss data residency, operator-owned infrastructure, ad-free business model, standard protocols, and optional suite tools (kDrive, kMeet) under Swiss/FADP-GDPR framing. Encryption models and admin tooling differ—run a pilot migration before cutting over MX records.