| Price from | $1/mo | $0.46/mo |
| Free plan | — | — |
| Free trial | Yes | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| macOS | Yes | — |
| iOS | Yes | — |
| Android | Yes | — |
| API | Yes | — |
| Self-hosted | — | Yes |
| Plans published | 3 | 6 |
| Spec score · Email Signature Management Software | 8.3 (#12) | 7.3 (#40) |
| Deployment | Deployment options include server-side signature injection, an Outlook add-in, and Gmail API integration; multiple methods can be used together. | The EDU/On Premise plan includes on premise deployment, customizations, and new requirements. |
| Headquarters | San Francisco, California, United States | San Salvador, El Salvador |
| Integrations | Listed integrations include Microsoft 365, Google Workspace, Salesforce, HubSpot, Marketo, Active Directory, Okta, Workday, and others. | Zumpul is presented as a Google Workspace Marketplace application and is designed for Google Workspace domains. |
| Purpose | Opensense centrally manages company email signatures, campaigns, sales insights, and compliance in one platform. | Zumpul lets Google Workspace companies manage their domain users’ email signatures from one place. |
| Security | Opensense says its SOC 2 Type II attestation covers Security, Confidentiality, and Availability and is completed annually. | The privacy policy says Zumpul uses OAuth 2.0 for Google authentication and authorization and does not access consumer @gmail.com account data. |
| Support | The pricing page lists US-based support, a dedicated customer success manager and technical contact, and 24x7 priority phone support. | The PRO plan lists support and training 24/7 and implementation consulting. |
