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Head-to-head · Secure Email Providers

Tuta Mail vs Aster Mail

  • Updated Oct 2026
  • Both researched from official sources
  • 6 checks side by side
Higher score Tuta Mail #2 in Secure Email Providers 9.2/10 Free plan Free plan✓ 3 of 3 features Visit Tuta Mail
Aster Mail #3 in Secure Email Providers 8.9/10 Free plan Free plan✓ 2 of 3 features Visit Aster Mail

Tuta Mail leads on 1 check, Aster Mail on 1, and 4 are even. Who comes out ahead on the 6 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreTuta Mail · 9.2/10
  • Free planboth
  • Most featuresTuta Mail · 3 of 3

Tuta Mail scores higher on our rubric for secure email providers: 9.2 against 8.9 out of 10; our editors rank them #2 and #3.

Aster Mail leads on mailbox storage: 50 GB versus 20 GB. Tuta Mail offers encrypted calendar; Aster Mail doesn't. On mail protocol support, Aster Mail gives you Bridge where Tuta Mail offers None.

Tuta Mail is the better fit for users prioritizing deep encryption and privacy. Aster Mail is the better fit for feature-rich secure email at a low price.

  • Tuta Mail fits best

    Users prioritizing deep encryption and privacy

  • Aster Mail fits best

    Feature-rich secure email at a low price

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.

Side by side

Feature Tuta Mail 9.2/10 Visit ↗ Aster Mail 8.9/10 Visit ↗
At a glance
Editor score 9.2 8.9
Ranking #2 in Secure Email Providers #3 in Secure Email Providers
Best for Users prioritizing deep encryption and privacy Feature-rich secure email at a low price
Pricing model Free plan + paid Free plan + paid
Starting price €3/user/mo $2.42/user/mo
Free plan ✓ ✓
Free trial — —
Deployment Cloud, Desktop, Mobile Cloud, Desktop, Mobile
Platforms Web, Windows, macOS, Linux, iOS, Android Web, Windows, macOS, Linux, iOS, Android
Features Tuta Mail 3/3 · Aster Mail 2/3
End-to-end encryption ✓ ✓
Custom domain ✓ ✓
Encrypted calendar ✓ (best) —
Specs
Mailbox storage 20 GB 50 GB (best)
Email aliases 15 aliases 15 aliases
Mail protocol support None Bridge
Our review
Pros
  • Encrypts email content, subjects, attachments, calendars, and contacts
  • Open-source clients for web, desktop, Android, and iOS
  • Free plan plus paid custom-domain and offline-access options
  • Free plan includes 10 GB encrypted storage and five aliases
  • OpenPGP, tracker blocking, import, export, and mail rules
  • Web, desktop, and mobile apps plus Aster Bridge support
Cons
  • No IMAP or other mail-protocol access
  • No listed integrations
  • The free plan includes 1 GB storage and one calendar
  • Encrypted calendar is still in active development
  • Server code is not public, despite open-source apps and cryptography
  • Founded in 2026, so long-term maturity evidence is limited
Our verdict

Tuta Mail is a secure email service for individuals, families, businesses, journalists, activists, and organizations that prioritize privacy. It provides web, desktop, and mobile apps across Windows, macOS, Linux, iOS, and Android.…

Read the review →

Aster Mail is an encrypted email service for privacy-conscious individuals, families, and teams. Its core design combines local encryption on supported devices with a zero-access encrypted mailbox architecture. Users can access mail…

Read the review →
  1. Tuta MailSecure Email Providers 9.2Free plan
  2. Aster MailSecure Email Providers 8.9Free plan

Strengths and trade-offs

  • Tuta Mail — where it wins

    • Encrypts email content, subjects, attachments, calendars, and contacts
    • Open-source clients for web, desktop, Android, and iOS
    • Free plan plus paid custom-domain and offline-access options

    Where it doesn't

    • No IMAP or other mail-protocol access
    • No listed integrations
    • The free plan includes 1 GB storage and one calendar

  • Aster Mail — where it wins

    • Free plan includes 10 GB encrypted storage and five aliases
    • OpenPGP, tracker blocking, import, export, and mail rules
    • Web, desktop, and mobile apps plus Aster Bridge support

    Where it doesn't

    • Encrypted calendar is still in active development
    • Server code is not public, despite open-source apps and cryptography
    • Founded in 2026, so long-term maturity evidence is limited

More comparisons

All secure email providers comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update