HEY vs Shortwave vs Spark Mail
| Attribute | |||
|---|---|---|---|
| Category | Communication | Communication | Communication |
| Pricing | Paid | Free tier | Free tier |
| Starting price | $99/month | $7/month | $4.99/month |
| Free tier | No | Yes | Yes |
| Free trial | Yes | Yes | Yes |
| Deployment | — | — | — |
| API available | Unknown | Unknown | Unknown |
| Platforms | — | — | — |
| Certifications | — | — | — |
| Integrations | — | 5 | — |
| Company | Founded 1992 | — | — |
| Feature attributes | |||
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Unknown values show as “Unknown”/“—”. Nothing is inferred — see each tool page for sources.