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site.proton.me business mail pricing: from $6.99 a user, with custom domains and catch-all

Proton's business plans as its pricing page lists them, how many domains and addresses each allows, how desktop apps connect, and how a self-hosted option on Cloudflare compares.

Published by
MarkRelay Research
Updated
Sources
4 primary sources, linked below

Summary

Proton's business email starts with Mail Essentials at $6.99 per user a month billed yearly: 15 GB, 3 custom domains and 10 addresses per user. Workspace Standard ($12.99) raises that to 1 TB, 15 domains and 20 addresses; Workspace Premium is $19.99. Every plan lists a catch-all address and SMTP access for external tools, and Proton Mail Bridge, which connects desktop mail apps, needs a paid plan. Proton's pitch is end-to-end encryption on its servers. MarkRelay's is different: the mail sits in your own Cloudflare account, for $99 a year plus Cloudflare, with no per-user fee.

Key findings

  1. 1Mail Essentials: $6.99 per user a month billed yearly ($83.88 a year), 15 GB, 3 custom domains, 10 addresses per user.
  2. 2Workspace Standard: $12.99, 1 TB, 15 domains, 20 addresses. Workspace Premium: $19.99, 3 TB, 20 domains.
  3. 3Every business plan lists a catch-all address and SMTP access for external tools.
  4. 4Proton Mail Bridge, for Outlook, Thunderbird and Apple Mail, is available only with a paid plan that includes Proton Mail.

Questions this report answers

Asked by real people, quoted as they wrote them.

“Alternatives to Proton for email”

r/privacy, 108 comments

Other hosted options include Tuta and Fastmail; Fastmail Standard is $5 per user a month for business. A different model is keeping the mail in infrastructure you control: MarkRelay stores it in your own Cloudflare D1 and R2.

“Best domain registrar for use with proton mail?”

r/ProtonMail, 68 comments

Any registrar where you can edit DNS records will do. What differs is how many domains each plan covers: Mail Essentials 3 domains, Workspace Standard 15.

“Proton Mail with custom domain: how to create a shared inbox with a Gmail user?”

r/ProtonMail, 10 comments

Proton's pricing page does not list a shared inbox. In MarkRelay a shared address is a mailbox you grant to any member you invite, whatever email they sign up with.

“Does mail+ allow for more than one domain ? And is there a way to have multiple mailboxes ?”

r/ProtonMail

On the business plans: Mail Essentials allows 3 domains and 10 addresses per user; each extra mailbox is another user. MarkRelay has no per-mailbox fee.

Proton business plans (USD, billed yearly)

Per user a month

Mail Essentials
$6.99
Workspace Standard
$12.99
Workspace Premium
$19.99

Storage per user

Mail Essentials
15 GB
Workspace Standard
1 TB
Workspace Premium
3 TB

Custom domains

Mail Essentials
3
Workspace Standard
15
Workspace Premium
20

Addresses per user

Mail Essentials
10
Workspace Standard
20
Workspace Premium
20

Catch-all address

Mail Essentials
Yes
Workspace Standard
Yes
Workspace Premium
Yes

SMTP access for external tools

Mail Essentials
Yes
Workspace Standard
Yes
Workspace Premium
Yes

Source: Proton business pricing, Proton Mail Bridge.

Proton or MarkRelay

Where mail is stored

Proton Mail Essentials
Proton's servers, end-to-end encrypted
MarkRelay
Your Cloudflare D1 and R2

Price for 5 users a year

Proton Mail Essentials
$419.40
MarkRelay
$159

Domains

Proton Mail Essentials
3
MarkRelay
Any number on Cloudflare DNS

Catch-all

Proton Mail Essentials
Yes
MarkRelay
One rule to the Worker; addresses without a mailbox rejected

Desktop mail apps

Proton Mail Essentials
Through Bridge
MarkRelay
No; webmail and API

API, webhooks, AI agents

Proton Mail Essentials
SMTP for tools
MarkRelay
HTTP API, signed webhooks, MCP

Yearly prices for the plan named. MarkRelay is the $99 Annual license plus $5 a month for Cloudflare Workers Paid, the same for any team size, with 3,000 sent emails a month included; receiving is free.

Two kinds of privacy

Proton says it uses end-to-end encryption so that no one, Proton included, can read your data on its servers. MarkRelay answers a different question: who holds the data. It runs in your own Cloudflare account and stores each message in your D1 database and R2 bucket, so the mail stays in an account you control, with Cloudflare as the infrastructure provider.

That makes MarkRelay a fit for teams that want their mail, keys and access rules under their own account, with per-mailbox access for members and scoped API keys for apps, rather than for people who need end-to-end encryption with outside contacts.

Where MarkRelay fits

A good fit when

  • Teams that want the mailboxes, data and access rules in their own Cloudflare account.
  • Many domains and mailboxes without a per-user fee.

Look elsewhere when

  • End-to-end encrypted mail: Proton does that; MarkRelay does not.
  • Desktop mail apps over IMAP.

Common questions

How much is Proton Mail for business?

Mail Essentials is $6.99 per user a month billed yearly; Workspace Standard $12.99; Workspace Premium $19.99.

Does Proton support catch-all?

Yes, Proton lists a catch-all address on all three business plans.

Sources and method

  1. Proton business pricing (proton.me/business/mail/pricing)
  2. Proton Mail Bridge (proton.me/mail/bridge)
  3. Fastmail pricing (www.fastmail.com/pricing/us/)
  4. Cloudflare Email Service pricing (developers.cloudflare.com/email-service/platform/pricing/)

Facts are taken from each vendor's own pricing pages, documentation or terms as of the updated date above; prices are in US dollars per month unless stated. Cost comparisons apply each vendor's published rates to the same volume. MarkRelay is not affiliated with Proton;"site.proton.me" in the title names the site these facts come from. MarkRelay sells a self-hosted email app, which this page mentions where it fits. Spotted something outdated? Tell us.

Revisions

  • : First published; every fact checked on the vendor's own pages.

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