Proton Mail
Superhuman
| Feature | Proton Mail | Superhuman |
|---|---|---|
| Pricing | Free / from $3.99/mo | From $25/mo |
| Free Plan | ✓ Yes | ✗ No |
| Rating | 4.5 / 5 | 4.6 / 5 |
| Best For | privacy-conscious-users, journalists, activists, security-professionals | executives, sales-professionals, founders, high-volume-emailers |
| Founded | 2014 | 2014 |
| Encryption | ✓ | ✗ |
| Zero Access Architecture | ✓ | ✗ |
| Self Destructing Emails | ✓ | ✗ |
| Custom Domains | ✓ | ✗ |
| Bridge For Desktop | ✓ | ✗ |
| Calendar | ✓ | ✗ |
| Keyboard Shortcuts | ✗ | ✓ |
| Ai Triage | ✗ | ✓ |
| Read Statuses | ✗ | ✓ |
| Split Inbox | ✗ | ✓ |
| Snippets | ✗ | ✓ |
| Scheduled Send | ✗ | ✓ |
| Undo Send | ✗ | ✓ |
✓ Proton Mail Pros
- End-to-end encryption
- No ads
- Swiss privacy laws
- Open source
✗ Proton Mail Cons
- Limited free storage
- Fewer integrations
- Search limited to metadata
✓ Superhuman Pros
- Fastest email client with sub-100ms interactions
- AI triage auto-prioritizes and summarizes emails
- Split inbox and snippets for efficient workflows
- Read statuses show when emails are opened
✗ Superhuman Cons
- Expensive at $25-33/month per user
- No free plan or trial without invite
- Gmail and Outlook only (no other providers)
The Verdict
Proton Mail is built for privacy conscious users and journalists, with a focus on encryption and zero-access-architecture. Superhuman targets executives and sales professionals and leads with keyboard-shortcuts and ai-triage.
On pricing, Proton Mail is the clear winner for budget-conscious users — starting at $3.99/mo compared to $25/mo for Superhuman. That $21.009999999999998/mo difference adds up quickly for growing teams.
Proton Mail has a free plan, which gives it a meaningful edge for individuals and small teams exploring their options. Superhuman requires a paid subscription from day one.
Feature-wise, Superhuman offers broader built-in capabilities (7 features vs 6), while Proton Mail takes a more focused approach — which can mean a simpler, faster onboarding experience.
This is a genuinely close comparison. If you can, sign up for both free trials (where available) and run a one-week test with your actual team tasks before deciding.