| Price from | $69/mo | $9/mo |
| Free plan | — | — |
| Free trial | — | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| iOS | Yes | — |
| Android | Yes | — |
| Plans published | 4 | 3 |
| Spec score · Email Warmup Software | 8.3 (#7) | 7.4 (#19) |
| Free tools | The site offers a free email spam checker, while describing the email warmup service as having no traditional free trial. | The homepage lists free DMARC, SPF, and DKIM generators and checkers, plus an inbox placement test. |
| Support | Every plan includes deliverability expertise, with plan-specific expert calls or on-demand calls listed on the pricing page. | Starter includes chat support, Professional includes priority support, and Advanced includes an onboarding call. |