Proton
Slack
| Feature | Proton | Slack |
|---|---|---|
| Pricing | Free / from $3.99/mo | Free / from $7.25/mo |
| Free Plan | ✓ Yes | ✓ Yes |
| Rating | 4.5 / 5 | 4.4 / 5 |
| Best For | privacy-advocates, journalists, activists, security-conscious-users | teams, enterprise, remote-workers, developers |
| Founded | 2014 | 2013 |
| Encrypted Email | ✓ | ✗ |
| Vpn | ✓ | ✗ |
| Cloud Storage | ✓ | ✗ |
| Calendar | ✓ | ✗ |
| Password Manager | ✓ | ✗ |
| Aliases | ✓ | ✗ |
| Self Destructing Messages | ✓ | ✗ |
| Channels | ✗ | ✓ |
| Huddles | ✗ | ✓ |
| Workflows | ✗ | ✓ |
| Integrations | ✗ | ✓ |
| File Sharing | ✗ | ✓ |
| Search | ✗ | ✓ |
✓ Proton Pros
- End-to-end encryption for all services
- Swiss-based with strong privacy laws
- Open-source and independently audited
- Comprehensive privacy suite (mail, VPN, drive, calendar)
- Free tier available for all services
✗ Proton Cons
- Free storage is limited (1GB for mail)
- Less feature-rich than mainstream alternatives
- Search functionality limited due to encryption
✓ Slack Pros
- Excellent integrations
- Channels system
- Huddles
- Searchable history
✗ Slack Cons
- Message limit on free plan
- Notification overload
- Can be distracting
The Verdict
Proton is built for privacy advocates and journalists, with a focus on encrypted-email and vpn. Slack targets teams and enterprise and leads with channels and huddles.
Pricing is close: Proton starts at $3.99/mo versus $7.25/mo for Slack — 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.
Feature-wise, Proton offers broader built-in capabilities (7 features vs 6), while Slack 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.
