Proton Mail pricing starts at nothing: the Proton Mail free plan costs $0, and the paid personal plans begin with Proton Mail Plus at $3.99 a month when billed yearly. This guide lists every plan that Proton shows on its price list, with prices in US dollars as displayed in November 2026.
The page can show other currencies and promotions, so check the live numbers before you pay. We did not buy a subscription, and we are not affiliated with Proton. BillionVerify is an email verification service. Weighing your options? Read the BillionVerify vs MyEmailVerifier comparison.
Key facts (checked November 2026):
- Per Proton's pricing page, the free plan gives 1 GB of storage, a single user and one encrypted address.
- According to the same page, Proton Mail Plus costs $4.99 monthly and $3.99 when billed yearly, while Proton Unlimited costs $12.99 monthly and $9.99 when billed yearly.
- Per the page, the group plans Duo and Family begin at $19.99 and $29.99 for a single month.
- According to Proton, every subscription carries a month-long refund window, and prices can be shown in CHF, EUR or USD.
- Per Proton's help center, a new free mailbox starts at half a gigabyte and doubles after a short checklist in the first 18 days.
- BillionVerify's account gives 20 free credits on each day you use it, with no card needed, for checking addresses before a campaign.
Proton Mail Pricing at a Glance
Proton Mail pricing has a switch between one month and twelve months, and tabs for Personal, Family and Business. This table shows the personal and group plans in both modes. All amounts are per month.
| Plan | Single month | Twelve months | Storage | Users |
|---|---|---|---|---|
| Free | $0 | $0 | 1 GB | 1 |
| Mail Plus | $4.99 | $3.99 | 15 GB | 1 |
| Proton Unlimited | $12.99 | $9.99 | 500 GB | 1 |
| Proton Duo | $19.99 | $14.99 | 2 TB | 2 |
| Proton Family | $29.99 | $23.99 | 3 TB | 6 |
The twelve-month mode bills the whole year at once: $47.88, $119.88, $179.88 and $287.88 for the four paid rows, from top to bottom.
Screenshot: the personal cards on Proton's price list with the twelve-month mode selected.
Is Proton Mail Free?
Yes, and the Proton Mail free plan stays free. The company explains that subscribers carry the cost, so the free plan rides on the people who upgrade. Its list shows 1 GB for a lone user, plus one encrypted email address.
What the Proton Mail Free Plan Limits
The comparison table spells out the caps of the Proton Mail free plan. An account sends up to 150 messages a day, keeps three folders and three labels, and has a single filter. Attachments top out at 25 MB. The desktop app is a 14-day trial, and the Bridge for desktop mail programs needs a subscription. Throwaway aliases stop at ten. Contact groups, auto-reply, a catch-all address and automatic forwarding are marked for paid plans only.
Sentinel, an optional monitoring program for accounts, shows up only on Proton Unlimited. Emergency access and dark web monitoring appear from Proton Mail Plus upward.
Screenshot: the comparison table lower down.
The Starter Checklist
A new Proton Mail free plan mailbox does not start at the full gigabyte. Proton's guide to extra storage says a new user begins with 500 MB and receives the rest after three tasks inside 18 days. Why does Proton Mail free storage start small? The tasks are to browse the privacy slides, to review the import options and to install the phone app. Only new free accounts qualify, and the bonus does not follow you into a paid plan.
Screenshot: the help article on the starter checklist.
Proton Mail Plus Pricing
Proton Mail Plus is the entry plan for people who want one mailbox with fewer limits. It costs $4.99 for a single month and $3.99 each month on the twelve-month mode. Proton lists these features:
- 15 GB for a single user
- ten encrypted email addresses
- support for one custom domain
- unlimited folders and labels
- ten throwaway aliases
- priority customer support
The table adds a few more points. Proton Mail Plus drops the daily send cap, includes the desktop app, and allows desktop programs through Bridge. It also unlocks the short pm.me address. For a person who wants an ordinary inbox on a custom domain, Proton Mail Plus covers the need.
Proton Unlimited
Proton Unlimited bundles mail with the other Proton services. It costs $12.99 for a single month, or $9.99 when the longer mode is chosen. The list reads:
- 500 GB of space for a single user
- fifteen extra email addresses
- support for three custom domains
- no limits on folders or labels
- no cap on throwaway aliases
- dedicated customer support
- a private VPN plus a password manager and encrypted cloud storage
- advanced account protection
The other services are the main reason to compare it with Mail Plus. A reader who only wants email pays for storage and apps that go unused, while a reader who wants the VPN and a vault for logins gets them on the same invoice.
Family and Duo Plans
Two plans cover several people. Duo is for two users with 2 TB of storage, and Family is for up to six users with 3 TB. Both list access to every Proton app and the Scribe writing assistant. The sign-up page for Family adds a count of up to 90 addresses and aliases, plus three domains of your own.
Screenshot: the group plans on the price list.
Per Proton's help center, a member of a group plan cannot add extra addresses alone, because only the plan administrator can create them for members.
Proton Mail Custom Domain Limits
A custom domain lets you use addresses such as contact@yourcompany.com inside Proton. Support depends on the plan: the free plan has none, Proton Mail Plus supports a single domain, Unlimited supports three, and the Family sign-up lists three as well. Proton's guide to addresses and aliases explains how a domain, an extra address, a hide-my-email alias and a plus alias differ.
Business plans raise the numbers, as the next section shows. The rule is simple: the plan decides how many domains you can attach, and addresses and aliases come on top. For a Proton Mail custom domain, the cheapest route is therefore Proton Mail Plus.
Proton Mail Business Plans
Proton Mail business pricing sits on its own tab and is quoted per user. Proton Mail business buyers get a trial before any payment. The price list shows three plans as of November 2026, each with a 14-day free trial. The Proton Mail business tab applies different rules than the personal one, and Proton Mail business users should read it separately.
| Business plan | Single month | Twelve months | Storage per user | Custom domains |
|---|---|---|---|---|
| Mail Essentials | $7.99 | $6.99 | 15 GB | not listed |
| Workspace Standard | $14.99 | $12.99 | 1 TB | 15 |
| Workspace Premium | $24.99 | $19.99 | 3 TB | 20 |
Mail Essentials lists ten encrypted addresses, secure email and calendar, appointment scheduling, cloud storage with file sharing and a document editor. Workspace Standard adds video meetings for 100 participants, a VPN and a password manager with team vaults. Workspace Premium adds meetings for 250 participants and a private AI chat. Organization members also follow another recovery model, as our Proton Mail login guide notes.
Billing, Currency and Refunds
Proton states a refund guarantee of 30 days beside the plans, and we did not read the terms behind it. Three currencies are offered, Swiss francs, euros and US dollars, through a selector near the top. Choosing the twelve-month view lowers the monthly figure, and Proton then bills the full year at once, as the first table shows. Business buyers also see a note that taxes may apply.
Because a subscription renews on its own schedule, note the billing date and the mode that was chosen at checkout. If a plan is more than you need, the list lets you compare the lower plans before you pay.
Choosing Between the Tiers
Use Proton's list as the checklist. The decision points are storage, the number of addresses, custom domains, the send cap, desktop access and the extra services. A light personal inbox can live on the free plan if the caps work for you. Someone who needs a custom domain needs at least Proton Mail Plus. Anyone who also wants the VPN and a login vault should price separate tools next to Unlimited, using Proton's own numbers.
For Proton Mail pricing in context, our Proton Mail review covers ownership, encryption and limits. For how it compares with a large free provider, see Proton Mail vs Gmail.
Emailing Proton Mail Users? Verify Before You Send
Pricing has one more effect on a list. Paid plans allow a catch-all address and forwarding on a custom domain, so a business domain hosted at Proton may accept mail for any name. Throwaway aliases forward to a real inbox but can be switched off, and one account can hold ten or fifteen addresses. A flat list of addresses therefore hides duplicates and dead aliases. A Proton Mail business domain with a catch-all makes that worse.
BillionVerify's checks look at the domain behind an address as well as the mailbox.
BillionVerify's email verifier works on single entries, and bulk email verification handles whole lists. What to know:
- valid and invalid results cost 1 credit each, and unknown results are free
- a free re-check is available within 24 hours
- catch-all entries get their own label and are not counted as valid, which matters for domains that accept anything, and our catch-all verifier covers that case
- the free allowance is 20 credits per day of use, up to 600 a month, and credits never expire
- our servers are in France (EU), and a DPA can be signed
- you can use a REST API, an MCP server or one of 25+ integrations
We make no claim about how Proton's servers answer checks. If you also collect mobile numbers, our phone number validator shows whether a number fits its country. If a message claims to come from Proton, our reverse email lookup shows what is known about the sender.
FAQs
How much does Proton Mail cost?
Nothing on the free plan. The paid personal plans start with Proton Mail Plus, then Unlimited, and the exact amounts sit in the first table above.
Is the free plan really free?
Yes, and the company says its subscribers fund it. The trade-off is the caps on storage, addresses, folders, labels and daily sending.
What is the difference between Mail Plus and Proton Unlimited?
Mail Plus is the mail-first choice with 15 GB and ten addresses. Unlimited adds far more space, more addresses, three domains of your own and the other Proton services.
Can I use my own domain without paying?
No. The comparison table lists none for the free plan, one for Mail Plus and three for Unlimited.
Is there a refund?
Proton advertises a refund window of one month beside its plans. Read the terms for the details.
Can I pay in euros?
Yes, the selector offers CHF, EUR and USD. We list US dollars only, so check the live list for the other two.
Watch: How to Validate a Phone Number: Free Phone Number Validator
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