Best Proton Mail Alternatives in 2026
The top Proton Mail alternatives are Tuta Mail, Aster Mail and Mailfence: 15 secure email providers our editors would look at instead of Proton Mail, in our ranking order.
Proton Mail: A complete secure email suite with a capable free plan and wide platform coverage. Where it falls short: custom domains and expanded storage require a paid plan.
Switching from Proton Mail? For most secure email providers buyers the best Proton Mail alternative is Tuta Mail, built for users prioritizing deep encryption and privacy. On a budget, Aster Mail starts at $2.42/user/mo. Aster Mail offers the most mailbox storage (50 GB).
Why People Look for a Proton Mail Alternative
- Custom domains and expanded storage require a paid plan
- Some desktop-client features depend on Proton Mail Bridge
- Advanced plans may offer more capacity than light email users need
- Mailbox storage: 15 GB — up to 50 GB with Aster Mail
- Email aliases: 10 aliases — up to 100 aliases with Runbox
Quick Picks by What You Need
- Best overallTuta Mail9.2
Users prioritizing deep encryption and privacy
Visit Tuta Mail - Lowest priceAster Mail8.9
Paid plans from $2.42/user/mo
Visit Aster Mail - Best free optionTuta Mail9.2
Has a free plan
Visit Tuta Mail - Most mailbox storageAster Mail8.9
50 GB
Visit Aster Mail
All 15 Proton Mail Alternatives, Ranked
Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.
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Best forUsers prioritizing deep encryption and privacy
- Better than Proton Mail:
- Mailbox storage: 20 GB vs 15 GB
- Email aliases: 15 aliases vs 10 aliases
A privacy-focused email service with strong encryption and open-source apps.
- Encrypted calendar
- Custom domain
- End-to-end encryption
9.2/10★★★★★Visit Tuta Mail -
Best forFeature-rich secure email at a low price
- Better than Proton Mail:
- Mailbox storage: 50 GB vs 15 GB
- Email aliases: 15 aliases vs 10 aliases
A low-cost secure email service with encryption, aliases, domains, and broad device support.
- Custom domain
- End-to-end encryption
8.9/10★★★★☆Visit Aster Mail -
Best forSecure email plus collaboration tools
A secure email suite with OpenPGP, collaboration tools, and broad protocol support.
- End-to-end encryption
8.6/10★★★★☆Visit Mailfence -
Best forAffordable encrypted email with standard protocols
Affordable encrypted email with standard protocols, aliases, and cloud tools.
- End-to-end encryption
8.4/10★★★★☆Visit eclipso Mail -
Best forLow-cost secure hosting with client flexibility
A flexible secure email service with low-cost annual plans and broad client support.
- Custom domain
- End-to-end encryption
8.2/10★★★★☆Visit mailbox -
Best forCustom-domain users wanting mature private hosting
- Better than Proton Mail:
- Email aliases: 100 aliases vs 10 aliases
A mature private email host with broad protocol support, but only 2 GB on its entry plan.
- Custom domain
- End-to-end encryption
8.0/10★★★★☆Visit Runbox -
Best forHigh-storage freemium email users
- Better than Proton Mail:
- Mailbox storage: 20 GB vs 15 GB
- Email aliases: 100 aliases vs 10 aliases
A generous free tier with strong alias, storage and protocol support.
- Custom domain
- End-to-end encryption
7.9/10★★★★☆Visit Mailo -
Best forBudget users wanting free encrypted email
A low-cost encrypted email provider with useful protocols and modest storage tiers.
- End-to-end encryption
7.8/10★★★★☆Visit mail.de -
Best forEncrypting existing email accounts across devices
A flexible encryption layer for personal and business email across four operating systems.
- End-to-end encryption
7.7/10★★★★☆Visit SecureMyEmail -
Best forPrivacy-focused users who need disposable aliases
- Better than Proton Mail:
- Mailbox storage: 20 GB vs 15 GB
A privacy-focused mailbox with strong aliasing and encryption, but no free plan.
- Custom domain
- End-to-end encryption
7.6/10★★★★☆Visit StartMail -
Best forSecurity specialists wanting hardened email features
A privacy-focused email service with strong encryption features and limited availability.
- Custom domain
- End-to-end encryption
7.5/10★★★★☆Visit CounterMail -
Best forUsers wanting large storage and unlimited aliases
- Better than Proton Mail:
- Mailbox storage: 25 GB vs 15 GB
A paid mailbox for privacy-minded users who value storage, aliases, and open standards.
- Custom domain
- End-to-end encryption
7.4/10★★★★☆Visit Soverin -
Best forVery low-cost custom-domain mailbox hosting
- Better than Proton Mail:
- Mailbox storage: 35 GB vs 15 GB
A low-cost custom-domain mailbox service with useful team and calendar tools.
- Encrypted calendar
- Custom domain
7.3/10★★★★☆Visit NevTan Mail -
Best forUsers wanting post-quantum encryption and AI tools
A web-based secure email service with post-quantum encryption, aliases, and AI tools.
- Custom domain
- End-to-end encryption
7.2/10★★★★☆Visit OwnMail -
Best forSecure groupware users needing broad sync support
A broad groupware service with PGP email encryption and extensive sync support.
- Custom domain
7.1/10★★★★☆Visit Kolab Now
Proton Mail Alternatives: Common Questions
What is the best alternative to Proton Mail?
Tuta Mail: #2 in our Secure Email Providers ranking, with an editor score of 9.2 out of 10. A privacy-focused email service with strong encryption and open-source apps.
Is there a free alternative to Proton Mail?
Yes. Tuta Mail, Aster Mail, Mailfence, eclipso Mail Europe and Mailo have a free plan or a free tier (9 of the 15 alternatives on this page).
What is the cheapest paid alternative to Proton Mail?
Of the alternatives here that publish a price, Aster Mail starts lowest, at $2.42/user/mo.
Why do people look for Proton Mail alternatives?
Custom domains and expanded storage require a paid plan; Some desktop-client features depend on Proton Mail Bridge; Advanced plans may offer more capacity than light email users need.
Which Proton Mail alternative has the most mailbox storage?
Aster Mail, with 50 GB.
How do I switch from Proton Mail?
Export your data from Proton Mail (most tools have an export in their settings). Sign up for the alternative; start on its free plan or trial if it has one. Import your export and set up the integrations your team relies on. Run both side by side for a short while, then cancel Proton Mail.
How to Switch from Proton Mail
- Export your data from Proton Mail (most tools have an export in their settings).
- Sign up for the alternative; start on its free plan or trial if it has one.
- Import your export and set up the integrations your team relies on.
- Run both side by side for a short while, then cancel Proton Mail.
Proton Mail vs Each Alternative
| # | Tool | Free plan | Paid from | End-to-end encryption | Custom domain | Mailbox storage | Email aliases | Score |
|---|---|---|---|---|---|---|---|---|
| 1 | Proton Mail | Yes | Yes | Yes | 15 GB | 10 aliases | 9.4 | |
| 1 | Tuta Mail | Yes | €3/user/mo | Yes | Yes | 20 GB | 15 aliases | 9.2 |
| 2 | Aster Mail | Yes | $2.42/user/mo | Yes | Yes | 50 GB | 15 aliases | 8.9 |
| 3 | Mailfence | Yes | €2.50/mo | Yes | No | 5 GB | 10 aliases | 8.6 |
| 4 | eclipso Mail Europe | Yes | Yes | No | 10 GB | 10 aliases | 8.4 | |
| 5 | mailbox | No | €1/mo | Yes | Yes | 2 GB | 3 aliases | 8.2 |
| 6 | Runbox | No | €1.66/user/mo | Yes | Yes | 2 GB | 100 aliases | 8.0 |
| 7 | Mailo | Yes | €1.50/user/mo | Yes | Yes | 20 GB | 100 aliases | 7.9 |
| 8 | mail.de | Yes | €0.99/mo | Yes | 2.5 GB | 1 aliases | 7.8 | |
| 9 | SecureMyEmail | Yes | Yes | 7.7 | ||||
| 10 | StartMail | No | $4.99/user/mo | Yes | Yes | 20 GB | 7.6 | |
| 11 | CounterMail | No | $29/user/mo | Yes | Yes | 4 GB | 7.5 | |
| 12 | Soverin | No | €3.25/user/mo | Yes | Yes | 25 GB | 7.4 | |
| 13 | NevTan Mail | Yes | $2/yr | Yes | 35 GB | 7.3 | ||
| 14 | OwnMail | Yes | $4.99/mo | Yes | Yes | 10 GB | 7.2 | |
| 15 | Kolab Now | No | 5 CHF/user/mo | No | Yes | 5 GB | 7.1 |
Head-to-Head
- Proton Mail vs Tuta Mail
- Proton Mail vs Aster Mail
- Proton Mail vs Mailfence
- Proton Mail vs eclipso Mail Europe
- Proton Mail vs mailbox
- Proton Mail vs Runbox
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Last updated · How we research and update