SMTP Labs vs smtp4dev
| SMTP Labs | smtp4dev | |
|---|---|---|
| Free plan | Yes | No |
| Free trial | No | No |
| Paid from | $7/mo | — |
| Open source | No | No |
| Platforms | api, Web | Web, Windows, macOS, Linux |
| Free plan | Yes | Yes |
| Paid from | 7 /mo | — |
| Spam checks | Yes | — |
| Link checks | Yes | — |
| Inbox testing | Yes | — |
| API access | Yes | Yes |
| Device coverage | — | both |
Both are listed in Best Email Testing Software. On Samsung Mobile US Press, SMTP Labs scores higher on our published basis.