Whitemail
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Comparison

Whitemail vs Microsoft 365, Exchange,
Google Workspace, Zimbra & Zoho Mail

The same business email and collaboration your team expects — but self-hosted on infrastructure you own, under a perpetual licence with no per-seat fees. Here's how Whitemail lines up against the major suites.

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Side by side

Feature comparison at a glance

Cloud suites are fully managed for you; Whitemail and Zimbra run on your own infrastructure. The difference that matters most is who holds your data and how you pay for it.

Capability WhitemailSelf-hosted Microsoft 365Cloud Google WorkspaceCloud ZimbraSelf-hosted Zoho MailCloud
Self-hosted / on-premises Yes — your servers Cloud only Cloud only Yes Cloud
Your data stays on your infrastructure Full sovereignty Microsoft cloud Google cloud Yes Zoho cloud
Licence model Perpetual Subscription Subscription Annual Subscription
Per-seat fees None Per user / mo Per user / mo Per mailbox / yr Per user / mo
Email, calendars & contacts Yes Yes Yes Yes Yes
Internal chat & file sharing, built in In the webmail Teams / OneDrive Chat / Drive Limited Cliq / WorkDrive
Mobile push (ActiveSync) Yes Yes Yes Yes Yes
Anti-spam & anti-virus, included Built-in Yes Yes Yes Yes
High-availability clustering you control By design Vendor-managed Vendor-managed Network edition Vendor-managed
Active Directory / LDAP integration Yes Entra ID Directory sync Yes Directory sync
Air-gapped / offline deployment Yes No No Yes No
Open standards (IMAP / CalDAV / CardDAV) Yes Partial Yes Yes Yes
Fully managed for you (no ops) You run it Yes Yes You run it Yes
Included / your control Partial, add-on or vendor-managed Not available

Comparison compiled from publicly available information and typical configurations; vendor features and tiers change — please verify current details with each provider.

Head to head

Whitemail vs each alternative

What changes when you move from a managed cloud suite — or an older self-hosted stack — to Whitemail.

vs Microsoft 365 Cloud

Microsoft 365 is a managed cloud suite billed per user per month, with your mail in Microsoft's cloud and deep ties to Office and Teams.

  • Keep every message on infrastructure you own — no vendor cloud.
  • Perpetual licence per deployment instead of per-seat subscriptions.
  • Air-gap-ready for regulated and sovereign environments.

vs Microsoft Exchange Self-hosted

Exchange Server keeps mail on-prem but ties you to Windows Server, per-user CALs, and a roadmap that steers you toward the cloud.

  • Runs on Linux — no Windows Server or CAL licensing.
  • Anti-spam, anti-virus and HA clustering included in the box.
  • Guided, zero-downtime migration straight off Exchange.

vs Google Workspace Cloud

Google Workspace is a per-user cloud subscription with mail in Google's cloud and collaboration built around Docs and Drive.

  • You choose the data region — meet residency and compliance rules.
  • No profiling of your mail for ads or model training.
  • Standards-based — keep Outlook, Thunderbird and Apple Mail.

vs Zimbra Self-hosted

Zimbra pioneered self-hosted groupware. Whitemail modernises the idea for today's teams and threat model.

  • Fast single-login webmail with built-in chat and file sharing.
  • High availability by design and an air-gap-ready installer.
  • Perpetual licence rather than an annual per-mailbox fee.

vs Zoho Mail Cloud

Zoho Mail is affordable cloud email. Whitemail is for teams that must keep mail on their own infrastructure.

  • Self-hosted and on-premises — data never leaves your walls.
  • Own your upgrade cadence and data lifecycle end to end.
  • Scales to 50,000+ mailboxes on your own cluster.

vs Proton Mail Business Cloud

Proton is privacy-focused cloud email. Whitemail gives you privacy through ownership plus full groupware.

  • Run everything yourself — no third-party custodian at all.
  • Full calendars, contacts, chat, files and mobile sync in one app.
  • Per-account PGP and S/MIME, managed on your terms.
An honest take

When Whitemail is the right fit

Self-hosting is a deliberate choice. Here's where it shines — and where a managed cloud suite may serve you better.

Choose Whitemail when…

  • Data residency, sovereignty or air-gap requirements rule out the cloud.
  • You're in a regulated sector and must control retention and audit yourself.
  • You'd rather own a perpetual licence than pay a per-seat subscription forever.
  • You have (or want) the ops capability to run your own high-availability mail.

A managed cloud may fit better when…

  • You want zero infrastructure to run and patch yourself.
  • The bundled Office / Docs productivity apps are central to your workflow.
  • Storing mail in a vendor's cloud is acceptable for your policies.
Make the switch

See Whitemail on your own infrastructure

Talk to our team about a self-hosted deployment sized to your organization — with guided, zero-downtime migration off Microsoft 365, Exchange, Google Workspace, Zimbra or Zoho Mail.

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