Comparison
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- 2 min
- Updated
- 14 Oct 2026
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- 4
Comparison
SuperMailOS vs Proton Mail
Encryption-first vs deliverability-first — an honest split.
2 min read · 14 Oct 2026 · 4 sections
Proton Mail and SuperMailOS optimize for different things. Proton optimizes for not being able to read your mail — end-to-end encryption, zero-access storage, Swiss privacy law. SuperMailOS optimizes for running business email across many domains with deliverability operated for you. The honest comparison is about which problem you actually have.
| Proton Mail | SuperMailOS | |
|---|---|---|
| Core promise | End-to-end encrypted email; provider can’t read your mail | Managed business email across many domains; deliverability as a service |
| Price | Per user. Workspace Standard: $12.99 a user a month billed yearly ($155.88 a year); Workspace Premium: $19.99. Mail-only plans (Mail Essentials, Mail Professional) exist; their prices weren’t verified here | Per mailbox: Pro $4/mo ($3 annual, 3 domains), Business $6/mo ($5 annual, unlimited domains) |
| Addresses | 20 email addresses per user on the Workspace plans | Unlimited free role aliases on every domain, into real inboxes |
| Custom domains | 15 (Workspace Standard) or 20 (Workspace Premium) | Pro up to 3 domains, Business unlimited domains |
| Built to protect against | The provider reading your mail: end-to-end encryption | Misconfigured DNS records, spoofing of your domains, deliverability operations |
Proton facts from Proton’s own pages: Proton pricing · checked 14 Oct 2026
Where Proton Mail wins
- Encryption is the product. If your threat model includes the provider itself — journalist, legal, medical, activist — end-to-end encryption is non-negotiable and we do not offer it.
- The ecosystem. Calendar, Drive, VPN, and Pass bundle into one privacy-first subscription.
- Jurisdiction. Swiss privacy law is a real feature for the people who need it.
Where SuperMailOS wins
- Business email mechanics. Unlimited role aliases, many domains in one inbox, per-domain authentication — the operational shape of a company's mail, not a personal privacy fortress.
- Deliverability operated. Authentication from the mail server's zone, warm-up, DKIM signing, DMARC reports parsed into a dashboard — the setup work business mail is judged on.
- Standard access. Full IMAP/SMTP for any client, no bridge required.
Which one fits you
If “the provider must not be able to read this” is a requirement: Proton, and it's not close. If the requirement is “every product's email in one inbox, on one bill, and nobody has to become a mail admin”: SuperMailOS. 14-day trial, no card.
FAQ
Is SuperMailOS encrypted?
Mail is encrypted in transit ( TLS ) and at rest on the server, as standard — but not end-to-end: the server processes mail to provide spam filtering, search, and deliverability features. That is the honest trade.
Can I use Proton for personal and SuperMailOS for business?
Yes, and it's a sensible split — privacy for personal correspondence, managed multi-domain email for the company.
Do you support custom domains with multiple users?
That's the core: unlimited domains ( Business tier ), each with unlimited aliases and per-user mailboxes in one inbox.