Gmail vs ProtonMail vs Readwise
| Attribute | |||
|---|---|---|---|
| Category | Email & Messaging Marketing | Email & Messaging Marketing | Productivity & Collaboration |
| Pricing | Free tier | Free tier | Paid |
| Starting price | $7/month | $3.99/month | $5.59/month |
| Free tier | Yes | Yes | No |
| Free trial | Yes | No | Yes |
| Deployment | — | — | — |
| API available | Unknown | Unknown | Unknown |
| Platforms | — | — | — |
| Certifications | — | — | — |
| Integrations | — | — | 1 |
| Company | — | Founded 2013 | — |
| Feature attributes | |||
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Unknown values show as “Unknown”/“—”. Nothing is inferred — see each tool page for sources.