| Price from | $1.67/mo | $69/mo |
| Free plan | — | — |
| Free trial | Yes | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| API | — | Yes |
| Plans published | 6 | 3 |
| Spec score · Email Scheduling Software | 8.1 (#11) | 8.1 (#12) |
| Integrations | GMass lists a REST API, webhooks, Zapier, Google Sheets API, and SMTP relay as ways to connect with other apps and services. | Slack, Zapier and the Chrome extension are listed as basic integrations; HubSpot and Pipedrive are included on Growth, and Salesforce on Enterprise. |
| Product | GMass sends newsletters, announcements, cold email campaigns, and transactional email from inside Gmail. | Overloop helps find B2B prospects, get contact details and run personalized email and LinkedIn outreach sequences. |
| Support | GMass directs customers to read support guidelines and submit a support form to contact its support team. | Starter and Growth include chat support; Enterprise includes priority chat and email support and a dedicated Customer Success Manager. |
