Arc Browser
Proton Mail
| Feature | Arc Browser | Proton Mail |
|---|---|---|
| Pricing | Free only | Free / from $3.99/mo |
| Free Plan | ✓ Yes | ✓ Yes |
| Rating | 4.5 / 5 | 4.5 / 5 |
| Best For | knowledge-workers, researchers, designers, tab-heavy-users | privacy-conscious-users, journalists, activists, security-professionals |
| Founded | 2022 | 2014 |
| Vertical Tabs | ✓ | ✗ |
| Spaces | ✓ | ✗ |
| Split View | ✓ | ✗ |
| Boosts | ✓ | ✗ |
| Easel | ✓ | ✗ |
| Notes | ✓ | ✗ |
| Ai Features | ✓ | ✗ |
| Encryption | ✗ | ✓ |
| Zero Access Architecture | ✗ | ✓ |
| Self Destructing Emails | ✗ | ✓ |
| Custom Domains | ✗ | ✓ |
| Bridge For Desktop | ✗ | ✓ |
| Calendar | ✗ | ✓ |
✓ Arc Browser Pros
- Innovative sidebar with vertical tabs and spaces
- Built-in tools (notes, easel, split view) reduce extensions
- Profiles and spaces for work/personal separation
- Beautiful design with attention to detail
✗ Arc Browser Cons
- Mac and iOS focused (Windows version limited)
- Steep learning curve from traditional browsers
- Company pivoting away from Arc to new product
✓ 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
The Verdict
Arc Browser is built for knowledge workers and researchers, with a focus on vertical-tabs and spaces. Proton Mail targets privacy conscious users and journalists and leads with encryption and zero-access-architecture.
Arc Browser uses custom enterprise pricing, while Proton Mail starts at $3.99/mo — a tangible advantage for teams with a fixed budget.
Both offer free plans, so you can test each with your real workflow before committing to a subscription.
Feature-wise, Arc Browser 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.