| Price from | $1.67/mo | $1.50/mo |
| Free plan | — | — |
| Free trial | Yes | — |
| Open source | — | — |
| Web | Yes | Yes |
| API | — | Yes |
| Plans published | 6 | 7 |
| Spec score · Email Scheduling Software | 8.1 (#11) | 7.3 (#30) |
| Integrations | GMass lists a REST API, webhooks, Zapier, Google Sheets API, and SMTP relay as ways to connect with other apps and services. | The product offers direct lead and mailbox pushes to Instantly and PlusVibe, plus CSV export and Apollo and Sales Navigator connections. |
| Product | GMass sends newsletters, announcements, cold email campaigns, and transactional email from inside Gmail. | SendEmAll describes itself as an end-to-end outbound platform for finding verified B2B buyers, running campaigns, and handling sending infrastructure. |
| Support | GMass directs customers to read support guidelines and submit a support form to contact its support team. | Pricing states that in-app chat support with real people during working hours is included on every plan. |
