Proton Mail for business is a paid email service for teams that want company-domain addresses, central account management, and encryption designed to protect message content. It is worth considering when privacy is a priority, but you should check desktop-app compatibility, website email, shared-address workflows, and migration requirements before switching.
Mail Essentials is the starting point for business email. Workspace Standard and Workspace Premium add broader productivity and security tools. The right choice depends on what your team will use, not simply the largest storage allowance.
What does Proton Mail for business include?
Proton’s business plans let employees use addresses such as [email protected], with an administrator managing the organisation.
Mail Essentials includes:
- 15 GB of storage per user.
- 10 email addresses per user.
- Support for three custom email domains.
- Email and calendar tools.
- Dedicated apps and central user administration.
Ten addresses per user does not mean ten separately licensed employees. Count the people who need their own accounts before estimating your costs.
For larger requirements, Workspace Standard includes 1 TB of storage per user and support for 15 custom domains. Workspace Premium increases these to 3 TB and 20 domains. Proton’s business plan guide also confirms that the older Mail Professional plan is deprecated.
How much does Proton business email cost?
The following are published USD reference prices, reviewed on September 27, 2026. Annual-plan rates are monthly equivalents, not the total annual payment.
| Plan | Per user/month on an annual plan | Calculated annual cost per user | Main reason to consider it |
|---|---|---|---|
| Mail Essentials | US$6.99 | US$83.88 | Business email and calendar |
| Workspace Standard | US$12.99 | US$155.88 | Email plus a broader collaboration and security suite |
| Workspace Premium | US$19.99 | US$239.88 | Expanded storage, retention policies, and additional tools |
Proton publishes the Mail Essentials figure in its team collaboration guide. Its Workspace announcement lists Standard and Premium annual-plan rates, with monthly subscriptions at US$14.99 and US$24.99 respectively. Confirm the current total, taxes, and any promotional conditions on the business pricing page before subscribing.
Illustrative five-person budget: At those annual-plan rates, Mail Essentials totals US$419.40 per year, Standard US$779.40, and Premium US$1,199.40, before tax and other costs.
Canadian businesses should also budget for currency conversion. Proton’s billing-currency guidance says business plans support USD, EUR, and CHF—not CAD. Your payment provider may add conversion fees.
Include domain renewal, migration work, staff training, and any separate software you still need when comparing the total cost.
Which plan makes sense for a small business?
Start with Mail Essentials if your main requirements are business email, calendars, and a manageable number of domains.
Consider Workspace Standard if you will also use Proton’s Drive, Docs, Sheets, Meet, VPN, and password-management tools. A bundle is useful when it replaces subscriptions you would otherwise keep paying for.
Evaluate Workspace Premium when you need its larger storage allowance, email retention policies, higher meeting capacity, or additional AI tools. Test the specific feature you need before upgrading. Proton’s plan comparison lists the differences.
Practical limitations to understand before switching
1. External email is not automatically end-to-end encrypted
Proton protects stored message bodies and attachments with zero-access encryption, which is designed to prevent Proton from reading that content.
Messages exchanged between Proton users receive end-to-end encryption automatically. However, ordinary messages sent to another provider generally use TLS, which protects the connection during delivery. The recipient’s provider may still be able to read its copy.
For end-to-end protected conversations outside Proton, use password-protected messages or a correctly configured PGP workflow. Subject lines and sender/recipient addresses are not end-to-end encrypted. Read Proton’s encryption explanation before deciding what information belongs in an email.
This distinction matters when your customers and suppliers use a mixture of email providers.
2. Outlook and other desktop clients need extra setup
Proton Mail Bridge connects supported desktop email applications to Proton. It runs on Windows, macOS, and Linux and is available with paid Mail plans.
Bridge does not run on mobile devices, and Proton does not offer POP3 support. Check the Bridge setup guidance and the supported client versions. Do not assume every application called Outlook has the same compatibility.
Trial your exact computer, phone, and email application before moving the team.
3. Website forms and business software require separate configuration
Proton supports SMTP submission, a method for applications and devices to send email, on paid Mail plans using custom-domain addresses.
This can support WordPress forms, customer-management software, and printers. Setup uses a dedicated SMTP token rather than your ordinary Proton account password.
Two limitations matter:
- SMTP submission handles sending, not access to incoming messages.
- Messages sent through this SMTP feature are not end-to-end encrypted.
Follow Proton’s SMTP instructions, then test enquiries, notifications, and replies from the actual application. A successful inbox login does not prove your website’s email is configured.
4. Paid accounts still have sending limits
Proton Mail is not designed for bulk mailing. Paid-account sending limits depend on account reputation, and Proton currently limits a message to 100 recipients.
Use a suitable email-marketing service for newsletters and large campaigns. Do not treat a business inbox subscription as unlimited campaign delivery. See Proton’s sending-limit guidance.
5. Administrator access needs a deliberate policy
Proton distinguishes between private and non-private organisation accounts.
For accounts created within a business organisation, Proton says the default is non-private, meaning an administrator can read their email. A private account prevents administrator access, and administrators cannot simply change it back to non-private.
Review the user-role documentation before setting up staff accounts. Decide how your business will handle account recovery, employee departures, and access to company correspondence.
6. Shared-address workflows need testing
An extra address attached to one account is not automatically a shared support inbox.
If several people answer [email protected], test who can receive and reply, whether colleagues can see previous replies, and how you avoid duplicate responses. Confirm the selected plan supports your required workflow before replacing an existing shared mailbox or help desk.
How to prepare for a move to Proton
A short pilot helps expose compatibility problems before they affect customers.
- List every account and address. Include staff, aliases, departmental addresses, website forms, and devices that send email.
- Choose plans and access rules. Confirm storage, administrator roles, recovery methods, and who needs an individual account.
- Prepare the destination accounts. Proton’s custom-domain instructions place user and address creation before changing MX records, which route incoming email.
- Plan data migration. Identify the messages, contacts, calendars, and files you need to preserve.
- Configure and test authentication. Follow Proton’s SPF, DKIM, and DMARC instructions to help receiving systems verify mail sent using your domain.
- Test delivery before cancelling the old service. Check incoming messages, replies, invitations, mobile access, forms, and important business applications.
For Google Workspace, Easy Switch for Business supports migrating email, calendars, and contacts. Proton’s published guidance says Google Drive migration is not included, so plan file transfers separately.
Frequently asked questions
Can I keep my existing business email address?
Yes, if it uses a domain you control and you configure that domain with Proton. You must create the required addresses and update the domain’s email records.
Do my customers need Proton accounts?
No. You can exchange ordinary email with people using other providers. For sensitive conversations requiring end-to-end encryption, choose an appropriate password-protected or PGP workflow.
Does Proton replace every Microsoft 365 or Google Workspace feature?
Do not assume feature-for-feature compatibility. Test the documents, meetings, shared-address processes, and third-party applications your team relies on. Choosing Workspace adds more tools, but it does not remove the need for that assessment.
Is Proton Mail for business worth considering?
Proton is worth considering when privacy, custom-domain email, and central account management fit your priorities. Its value is strongest when your team is comfortable with its apps and the integrations you need work reliably in a pilot.
If you are also improving how customers contact your business online, explore HMDIA’s website design services or contact HMDIA to discuss your website and enquiry experience.
