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Head-to-head · Secure Email Providers

Aster Mail vs Mailfence

  • Updated Oct 2026
  • Both researched from official sources
  • 6 checks side by side
Higher score Aster Mail #3 in Secure Email Providers 8.9/10 Free plan Free plan✓ 2 of 3 features Visit Aster Mail
Mailfence #4 in Secure Email Providers 8.6/10 Free plan Free plan✓ 1 of 3 features Visit Mailfence

Aster Mail leads on 3 checks, Mailfence on 0, and 3 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 scoreAster Mail · 8.9/10
  • Free planboth
  • Most featuresAster Mail · 2 of 3

Aster Mail scores higher on our rubric for secure email providers: 8.9 against 8.6 out of 10; our editors rank them #3 and #4.

Aster Mail offers custom domain; Mailfence doesn't. Aster Mail leads on mailbox storage: 50 GB versus 5 GB. Aster Mail leads on email aliases: 15 aliases versus 10 aliases. On mail protocol support, Aster Mail gives you Bridge where Mailfence offers None.

Aster Mail is the better fit for feature-rich secure email at a low price. Mailfence is the better fit for secure email plus collaboration tools.

  • Aster Mail fits best

    Feature-rich secure email at a low price

  • Mailfence fits best

    Secure email plus collaboration tools

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 Aster Mail 8.9/10 Visit ↗ Mailfence 8.6/10 Visit ↗
At a glance
Editor score 8.9 8.6
Ranking #3 in Secure Email Providers #4 in Secure Email Providers
Best for Feature-rich secure email at a low price Secure email plus collaboration tools
Pricing model Free plan + paid Free plan + paid
Starting price $2.42/user/mo €2.50/mo
Free plan ✓ ✓
Free trial — —
Deployment Cloud, Desktop, Mobile Cloud, Mobile
Platforms Web, Windows, macOS, Linux, iOS, Android Web, iOS, Android
Integrations 6 integrations 9 integrations
Features Aster Mail 2/3 · Mailfence 1/3
End-to-end encryption ✓ ✓
Custom domain ✓ (best) —
Encrypted calendar — Not checked yet
Specs
Mailbox storage 50 GB (best) 5 GB
Email aliases 15 aliases (best) 10 aliases
Mail protocol support Bridge None
Our review
Pros
  • 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
  • OpenPGP encryption, digital signatures, and key management
  • Shared calendars, documents, contacts, mailboxes, and groups
  • IMAP, POP, SMTP, CalDAV, CardDAV, and ActiveSync support
Cons
  • 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
  • Free plan provides only 1 GB of total storage
  • Base excludes custom domains and mail-client access
  • Larger storage tiers become substantially more expensive
Our verdict

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 →

Mailfence is a Belgium-based secure email service for privacy-conscious individuals, families, organizations, and universities. Its browser-based service combines email with OpenPGP end-to-end encryption, digital signatures, key…

Read the review →
  1. Aster MailSecure Email Providers 8.9Free plan
  2. MailfenceSecure Email Providers 8.6Free plan

Strengths and trade-offs

  • 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

  • Mailfence — where it wins

    • OpenPGP encryption, digital signatures, and key management
    • Shared calendars, documents, contacts, mailboxes, and groups
    • IMAP, POP, SMTP, CalDAV, CardDAV, and ActiveSync support

    Where it doesn't

    • Free plan provides only 1 GB of total storage
    • Base excludes custom domains and mail-client access
    • Larger storage tiers become substantially more expensive

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