Kagi
Proton Mail
| Feature | Kagi | Proton Mail |
|---|---|---|
| Pricing | From $5/mo | Free / from $3.99/mo |
| Free Plan | ✗ No | ✓ Yes |
| Rating | 4.6 / 5 | 4.5 / 5 |
| Best For | privacy-conscious-users, developers, researchers, power-users | privacy-conscious-users, journalists, activists, security-professionals |
| Founded | 2022 | 2014 |
| Ad Free Search | ✓ | ✗ |
| Ai Summaries | ✓ | ✗ |
| Personalization | ✓ | ✗ |
| Domain Blocking | ✓ | ✗ |
| Lenses | ✓ | ✗ |
| Privacy | ✓ | ✗ |
| Encryption | ✗ | ✓ |
| Zero Access Architecture | ✗ | ✓ |
| Self Destructing Emails | ✗ | ✓ |
| Custom Domains | ✗ | ✓ |
| Bridge For Desktop | ✗ | ✓ |
| Calendar | ✗ | ✓ |
✓ Kagi Pros
- No ads or tracking
- Customizable results
- AI-powered summaries
- Fast and accurate
✗ Kagi Cons
- No free plan
- Requires subscription
- Smaller index than Google
✓ 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
Kagi is built for privacy conscious users and developers, with a focus on ad-free-search and ai-summaries. Proton Mail targets privacy conscious users and journalists and leads with encryption and zero-access-architecture.
Pricing is close: Proton Mail starts at $3.99/mo versus $5/mo for Kagi — not a deciding factor on its own.
Proton Mail has a free plan, which gives it a meaningful edge for individuals and small teams exploring their options. Kagi requires a paid subscription from day one.
Both tools are a solid fit for privacy conscious users — in those cases, the decision often comes down to workflow style and how your team prefers to organize work.
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.