KumoMTA vs Stalwart Mail Server
KumoMTA
kumomta.com
Stalwart Mail Server
stalwart.emailSide by side
| Figure | KumoMTA | Stalwart Mail Server |
|---|---|---|
| Price from | $416.67/mo | $0.09/mo |
| Free plan | — | Yes |
| Free trial | — | Yes |
| Open source | — | — |
| Web | — | Yes |
| Windows | — | Yes |
| macOS | — | Yes |
| Linux | Yes | Yes |
| API | — | Yes |
| Self-hosted | — | Yes |
| Plans published | 4 | 16 |
| Spec score · Email Server Software | 6.5 (#26) | 8.0 (#12) |
Plans
KumoMTA
- CommunityPriced on request
- Silver sponsorship$5,000 a year
- Gold sponsorship$10,000 a year
- Enterprise sponsorshipPriced on request
Stalwart Mail Server
- CommunityFree
- Enterprise: 25–499 mailboxes$2.40 a year
- Enterprise: 500–999 mailboxes$2.04 a year
- Enterprise: 1,000–4,999 mailboxes$1.74 a year
- Enterprise: 5,000–10,000 mailboxes$1.48 a year
- Enterprise: 10,000–49,999 mailboxes$1.25 a year
- Enterprise: 50,000–99,999 mailboxes$1.09 a year
- Enterprise: 100,000+ mailboxesPriced on request
- Community EditionFree
- Enterprise — 50,000 to 99,999 mailboxes$1.09 a year
In their own words
Stalwart Mail Server
Stalwart Mail Server has no write-up on Specifiction yet; its figures are above.