Proton Mail
Spark
| Feature | Proton Mail | Spark |
|---|---|---|
| Pricing | Free / from $3.99/mo | Free / from $7.99/mo |
| Free Plan | ✓ Yes | ✓ Yes |
| Rating | 4.5 / 5 | 4.4 / 5 |
| Best For | privacy-conscious-users, journalists, activists, security-professionals | professionals, small-teams, freelancers, mac-users |
| Founded | 2014 | 2015 |
| Encryption | ✓ | ✗ |
| Zero Access Architecture | ✓ | ✗ |
| Self Destructing Emails | ✓ | ✗ |
| Custom Domains | ✓ | ✗ |
| Bridge For Desktop | ✓ | ✗ |
| Calendar | ✓ | ✗ |
| Smart Inbox | ✗ | ✓ |
| Ai Writing | ✗ | ✓ |
| Team Email | ✗ | ✓ |
| Scheduling | ✗ | ✓ |
| Templates | ✗ | ✓ |
| Priority Sorting | ✗ | ✓ |
✓ 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
✓ Spark Pros
- Beautiful design
- AI writing assistant
- Smart inbox
- Team features
✗ Spark Cons
- Limited platform support
- Privacy concerns
- Some features behind paywall
The Verdict
Proton Mail is built for privacy conscious users and journalists, with a focus on encryption and zero-access-architecture. Spark targets professionals and small teams and leads with smart-inbox and ai-writing.
Pricing is close: Proton Mail starts at $3.99/mo versus $7.99/mo for Spark — not a deciding factor on its own.
Both offer free plans, so you can test each with your real workflow before committing to a subscription.
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.