AddCal vs Proton
Both are Communication tools. Below, the differences that matter: verified pricing, editorial scores and who each one is really for.
AddCal: AddCal provides free add-to-calendar links and event pages to boost attendance across all major calendar apps. Pricing: Free forever. (data verified July 2026)
Proton: Proton offers end-to-end encrypted email, calendar, VPN, and storage with a free tier and paid plans from $3.99/mo. Pricing: Free · from $3.99/mo for Mail Plus · from $9.99/mo for Proton Unlimited. (data verified June 2026)
Transparency: if you buy through our links we may earn a commission, at no extra cost to you. Rankings cannot be bought. How we rate tools
At a glance
 AddCal |
 Proton ◆ | |
|---|---|---|
| Rating | — | — |
| Pricing | Free forever | Free · from $3.99/mo for Mail Plus · from $9.99/mo for Proton Unlimited |
| Pricing model | Free | Freemium |
| Category | Communication | |
| Visit website → | Visit website → | |
Editorial scorecard
Editorial score from our review methodology — not user ratings.
| Ease of use | 9.0 | 7.5 |
| Features depth | 6.5 | 8.5 |
| Value for money | 9.5 | 8.0 |
| Support quality | 5.5 | 6.5 |
| Integrations | 5.0 | 5.5 |
| Scalability | 6.0 | 7.0 |
| Documentation | 6.5 | 7.5 |
| Onboarding speed | 8.5 | 8.0 |
| Overall | 7.1 | 7.3 |
Frequently asked questions
What is AddCal?
AddCal provides free add-to-calendar links and event pages to boost attendance across all major calendar apps.
What is Proton?
Proton offers end-to-end encrypted email, calendar, VPN, and storage with a free tier and paid plans from $3.99/mo.
How much do AddCal and Proton cost?
AddCal: Free forever. Proton: Free · from $3.99/mo for Mail Plus · from $9.99/mo for Proton Unlimited.
More comparisons
AddCal vs SMTP AddCal vs Geekbot AddCal vs IGdm Pro AddCal vs Livestorm Proton vs Zulip Proton vs Proficonf