ProtonMail vs Skiff Mail vs Zoho Mail
| Attribute | |||
|---|---|---|---|
| Category | Email & Messaging Marketing | Email & Messaging Marketing | Email & Messaging Marketing |
| Pricing | Free tier | Free tier | Free tier |
| Starting price | $3.99/month | $0/month | $1/month |
| Free tier | Yes | Yes | Yes |
| Free trial | No | 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.