The Proton Unlimited alternative for mail and VPN
Secria Pro puts Secria Mail with 500 GB, unlimited aliases and 10 custom domains together with Secria VPN on 5 devices, for $9.99 a month on monthly billing. Post-quantum encryption is on by default in both, and Secria Calendar and Drive are coming to Pro soon. Proton lists Proton Unlimited at $12.99 a month on monthly billing.
- Post-quantum mail and VPN
- 10 custom domains
- 30-day money-back
Proton Unlimited vs Secria Pro
Mail and VPN, side by side
Every Proton cell links to Proton’s own pages.
| Question | Proton Unlimited | Secria Pro |
|---|---|---|
| Monthly billing | $12.99 a month.1 | $9.99 a month. |
| Yearly billing | $119.88 for 12 months.1 | $99 a year. |
| Mail storage | 500 GB.1 | 500 GB. |
| Custom email domains | Up to 3.1 | Up to 10. |
| Post-quantum email | A setting you enable.2 | On by default. |
| Post-quantum VPN | Described as groundwork for future work.3 | ML-KEM-1024 on WireGuard, on every connection. |
| Calendar and cloud storage | Included.1 | Secria Calendar and Drive, coming to Pro soon. |
- Proton, Proton Mail pricing: Proton Unlimited listed at $12.99 a month on monthly billing and $119.88 for the first 12 months on yearly billing, with 500 GB storage, support for 3 custom email domains, encrypted cloud storage and up to 25 personal calendars.
- Proton, How to enable post-quantum protection in Proton Mail (Proton Support).
- Proton VPN, Proton protocols: the next chapter of WireGuard at Proton VPN (August 12, 2026): “prepares the groundwork for future technologies, like stronger anti-censorship techniques and post-quantum cryptography.”
Checked October 31, 2026 against Proton’s own pages. Secria facts are from our pricing, Mail and VPN pages.
What you get with Secria Pro
Your mail and your connection, in one account
Post-quantum mail
Every message in your mailbox is sealed with ML-KEM-1024 with X25519, with nothing to switch on.
500 GB and unlimited aliases
Room for years of mail, an alias for every shop and newsletter, and up to 10 of your own domains.
Trackers removed
Tracking pixels are removed automatically and senders never see your IP address.
Post-quantum VPN
A fresh ML-KEM-1024 key on every connection, on 5 devices, with multi-hop and a kill switch.
RAM-only servers
No activity logs: we do not record browsing, DNS queries or traffic contents.
Calendar and Drive, coming soon
Secria Calendar and Drive are on their way to Pro, in the same account as your mail and VPN.
Switching from Proton Unlimited
Move at your own pace
Create your Secria account
Pick Secria Pro. No phone number needed. Save your recovery phrase when you sign up.
Bring your mail
Save your mail as EML files with Proton’s free Mail Export Tool. In Secria, open Settings, choose Import & export, and pick Import from Proton. Your mail is read and encrypted in your browser before upload.
Install the VPN, then cancel when you’re sure
Get the apps from the download page and run both for a while. The 30-day money-back covers plans bought on our site.
Step by step: export your Proton Mail emails, cancel a Proton subscription and delete a Proton account.
One plan for mail and VPN
Secria Pro
Secria Mail with 500 GB, unlimited aliases and 10 custom domains, plus the full Secria VPN on 5 devices.
Free
1 GB, 2 aliases, 3 folders and the same encryption as every paid plan. No card required.
Monthly price shown. Yearly and 2-year plans cost less per month. Compare all plans
30-day money-back on plans bought here. App Store and Google Play purchases follow their own refund rules.
Questions about switching from Proton Unlimited
Is Secria Pro cheaper than Proton Unlimited?
Yes, on the same billing term. Secria Pro is $9.99 a month on monthly billing or $99 a year. Proton lists Proton Unlimited at $12.99 a month on monthly billing and $119.88 for 12 months.
What does Secria Pro include?
Secria Mail with 500 GB, unlimited aliases and 10 custom domains, and the full Secria VPN on 5 devices, in one account. Post-quantum encryption is on by default in both.
Can I move my mail from Proton?
Yes. Save your mail as EML files with Proton's free Mail Export Tool, then in Secria open Settings, choose Import & export, and pick Import from Proton. Mail is read and encrypted in your browser before upload, and every email keeps its original date.
Can I use my own domain?
Yes. Secria Pro connects up to 10 custom domains. Proton lists support for 3 custom email domains on Proton Unlimited.
Can I try Secria Pro without risk?
Yes. Plans bought on our site come with a 30-day money-back guarantee. App Store and Google Play purchases follow their own refund rules.
Mail and VPN, post-quantum by default.
One account, one price.
30-day money-back on plans bought here.