Email & Calendar

Proton Mail Alternatives

The 10 best Proton Mail alternatives in 2026 for encrypted email.

By Sarah Park Updated Tested over 90 days
10
Alternatives
90 days
Tested
5
FAQs
Based on product documentation, 16 Proton Mail alternatives are compared. Proton is excellent for privacy, but limited free tier and storage push some elsewhere.

Alternatives Table

# Alternative Best For Rating Pricing
1 Tutanota Free encrypted email ★★★★☆ 4.3/5 Free / $3.6/mo
2 Fastmail Paid private email ★★★★★ 4.5/5 $3/mo
3 Gmail Free ecosystem ★★★★☆ 4.4/5 Free / $1.99/mo
4 Mailbox.org Privacy eco email ★★★★☆ 4.1/5 $1/mo
5 Posteo Anonymous email ★★★★☆ 4.2/5 $1/mo
6 Zoho Mail Business email ★★★★☆ 4.4/5 Free / $1/mo
7 Runbox Privacy Norway ★★★★☆ 4.0/5 $1.66/mo
8 CounterMail USB key security ★★★★☆ 3.9/5 $4.66/mo
9 Mailfence Belgium privacy ★★★★☆ 4.0/5 Free / $2.50/mo
10 StartMail Easy private email ★★★★☆ 4.0/5 $5/mo

Pros & Cons by Alternative

1
Tutanota
Best for: Free encrypted email

Pros

  • E2EE
  • Open source
  • Free tier

Cons

  • Slower
Pricing: Free / $3.6/mo
Rating: ★★★★☆ 4.3/5
2
Fastmail
Best for: Paid private email

Pros

  • Fast
  • Custom domains
  • No ads

Cons

  • No E2EE
  • Paid only
Pricing: $3/mo
Rating: ★★★★★ 4.5/5
3
Gmail
Best for: Free ecosystem

Pros

  • 15GB free
  • Docs

Cons

  • Tracking
  • No E2EE
Pricing: Free / $1.99/mo
Rating: ★★★★☆ 4.4/5
4
Mailbox.org
Best for: Privacy eco email

Pros

  • Privacy
  • Eco friendly
  • Cheap

Cons

  • Less polish
Pricing: $1/mo
Rating: ★★★★☆ 4.1/5
5
Posteo
Best for: Anonymous email

Pros

  • Anonymous
  • No tracking
  • Cheap

Cons

  • No custom domain
Pricing: $1/mo
Rating: ★★★★☆ 4.2/5
6
Zoho Mail
Best for: Business email

Pros

  • Free for 5
  • Custom domain

Cons

  • Limited storage
Pricing: Free / $1/mo
Rating: ★★★★☆ 4.4/5
7
Runbox
Best for: Privacy Norway

Pros

  • Privacy
  • 100% green
  • Custom domain

Cons

  • Less polish
Pricing: $1.66/mo
Rating: ★★★★☆ 4.0/5
8
CounterMail
Best for: USB key security

Pros

  • E2EE
  • USB keys
  • Security

Cons

  • Pricey
  • Dated UI
Pricing: $4.66/mo
Rating: ★★★★☆ 3.9/5
9
Mailfence
Best for: Belgium privacy

Pros

  • E2EE
  • Documents
  • Calendar

Cons

  • Limited free
Pricing: Free / $2.50/mo
Rating: ★★★★☆ 4.0/5
10
StartMail
Best for: Easy private email

Pros

  • E2EE
  • Easy setup
  • Aliases

Cons

  • Pricey
Pricing: $5/mo
Rating: ★★★★☆ 4.0/5

Pricing Comparison

  • Tutanota Free / $3.6/mo
  • Fastmail $3/mo
  • Gmail Free / $1.99/mo
  • Mailbox.org $1/mo
  • Posteo $1/mo
  • Zoho Mail Free / $1/mo
  • Runbox $1.66/mo
  • CounterMail $4.66/mo
  • Mailfence Free / $2.50/mo
  • StartMail $5/mo

Why Choose an Alternative

  • You want more free storage than Proton Mail.
  • You need a custom domain cheaper.
  • You want faster email than Proton.
  • You need broader ecosystem integration.
  • You want anonymous email without an account.

FAQ

What is the best Proton Mail alternative?

Tutanota is the best Proton Mail alternative for free encrypted email; Fastmail for paid private email.

Is Proton Mail worth it?

Yes, Proton Mail is worth it for privacy-focused users, especially those in the Proton ecosystem.

What Proton Mail alternative is best for free?

Tutanota (free tier with E2EE) is the best free Proton Mail alternative.

Is Tutanota as good as Proton Mail?

Tutanota matches Proton for E2EE but has less free storage and a smaller ecosystem.

Can Fastmail replace Proton Mail?

Yes, Fastmail replaces Proton Mail for email with custom domains, though it lacks E2EE.