Proton Mail vs Tuta Mail
Two of the top three encrypted email services, compared rule by rule on published facts.
In short
- Proton Mail has 85 points and Tuta Mail 73, 12 apart on our encrypted email services rules.
- Proton Mail earns more on trust and audits, apps and access and mailbox; Tuta Mail earns more on nothing.
- Cheapest paid plan: Proton Mail $3.99/mo, Tuta Mail $3.36/mo.
- Only Proton Mail meets: SOC 2 Type II or ISO 27001, works in standard mail programs and export your whole mailbox.
Proton Mail85/100 #1 of 9
Best for: People who want a free encrypted mailbox that grows into a paid one with custom domains and Outlook or Thunderbird access.
Tuta Mail73/100 #2 of 9
Best for: People who want contacts and calendar encrypted too, and are fine using Tuta's own apps instead of a mail program.
Points by group
| Group | Proton Mail | Tuta Mail |
|---|---|---|
| Encryption of 27 | 27 | 27 |
| Trust and audits of 26 | 18 | 14 |
| Apps and access of 18 | 16 | 10 |
| Mailbox of 13 | 12 | 10 |
| Price of 16 | 12 | 12 |
| Total | 85 | 73 |
Rule by rule
What each vendor publishes, and the points it earns. Sources are on each product page.
| Rule (points) | Proton Mail | Tuta Mail |
|---|---|---|
| Stored mail the provider cannot read (10) | Yes 10 | Yes 10 |
| Automatic end-to-end encryption between its own users (8) | Yes 8 | Yes 8 |
| Encrypted mail to other providers (6) | Yes 6 | Yes 6 |
| Encrypted contacts or calendar (3) | Yes 3 | Yes 3 |
| Independent audit since 2024 (8) | Not published 0 | Not published 0 |
| Open-source apps (6) | Yes 6 | Yes 6 |
| SOC 2 Type II or ISO 27001 (4) | Yes 4 | Not published 0 |
| Transparency report (4) | Yes 4 | Yes 4 |
| Security key for two-factor sign-in (4) | Yes 4 | Yes 4 |
| Official apps (10) | Windows, macOS, iOS, Android 8 | Windows, macOS, Linux, iOS, Android 10 |
| Works in standard mail programs (8) | Yes 8 | No 0 |
| Your own domain (5) | Yes 5 | Yes 5 |
| Mail storage on the cheapest paid plan (5) | 15 4 | 20 5 |
| Export your whole mailbox (3) | Yes 3 | Not published 0 |
| Free plan with an encrypted mailbox (6) | Yes 6 | Yes 6 |
| Cheapest paid plan (10) | $3.99/mo 6 | $3.36/mo 6 |
Proton Mail
Proton Mail suits people who want zero-access storage, a free starter mailbox and open-source apps. Mail Plus at $3.99 a month adds a custom domain and Bridge for desktop mail programs. The catch: Bridge is paid-only, the Linux app is still beta, and no outside audit of the mail apps dated 2024 or later is named on the vendor's open-source page.
Tuta Mail
Tuta suits people who want everything encrypted, including contacts and calendar, in open-source apps on all five systems. Revolutionary adds 20 GB and custom domains for about €3 a month. The catch: Tuta's own table shows no IMAP access, and the one outside pen test it names has no date.
Both products are scored by the same rules: how we score encrypted email services.