Airmail vs Spark Mail vs Superhuman vs Thunderbird
| Attribute | ||||
|---|---|---|---|---|
| Category | Communication | Communication | Communication | Communication |
| Pricing | Paid | Free tier | Paid | Free tier |
| Starting price | — | $4.99/month | $30/month | Free |
| Free tier | No | Yes | No | Yes |
| Free trial | No | Yes | Yes | No |
| Deployment | — | — | — | — |
| API available | Unknown | Unknown | Unknown | Unknown |
| Platforms | — | — | — | — |
| Certifications | — | — | — | — |
| Integrations | — | — | 5 | — |
| Company | — | — | — | Founded 2003 |
| Feature attributes | ||||
Also consider
Unknown values show as “Unknown”/“—”. Nothing is inferred — see each tool page for sources.