Confluence vs Gmail vs ProtonMail vs Spark Mail
| Attribute | ||||
|---|---|---|---|---|
| Category | Documentation Tools | Email & Messaging Marketing | Email & Messaging Marketing | Communication |
| Pricing | Free tier | Free tier | Free tier | Free tier |
| Starting price | $6.4/month | $7/month | $3.99/month | $4.99/month |
| Free tier | Yes | Yes | Yes | Yes |
| Free trial | Yes | Yes | No | Yes |
| Deployment | Cloud | — | — | — |
| API available | Unknown | Unknown | Unknown | Unknown |
| Platforms | — | — | — | — |
| Certifications | — | — | — | — |
| Integrations | 2 | — | — | — |
| Company | — | — | Founded 2013 | — |
| Feature attributes | ||||
Also consider
Unknown values show as “Unknown”/“—”. Nothing is inferred — see each tool page for sources.