Litmus vs SMTP Labs
| Litmus | SMTP Labs | |
|---|---|---|
| Free plan | No | Yes |
| Free trial | Yes | No |
| Paid from | $99/mo | $7/mo |
| Open source | No | No |
| Platforms | api, extension, Web | api, Web |
| Free plan | No | Yes |
| Email clients | 100 clients | — |
| Device coverage | both | — |
| Spam checks | Yes | Yes |
| Accessibility checks | Yes | — |
| Link checks | Yes | Yes |
| Inbox testing | Yes | Yes |
| API access | Yes | Yes |
| Paid from | — | 7 /mo |
Both are listed in Best Email Testing Software. On Samsung Mobile US Press, SMTP Labs scores higher on our published basis.