| Price from | $10/mo | — |
| Free plan | Yes | — |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | — |
| Windows | Yes | — |
| macOS | — | Yes |
| Linux | Yes | Yes |
| iOS | — | Yes |
| Android | — | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 2 | 0 |
| Spec score · Chat APIs | 8.4 (#4) | 7.3 (#28) |
| Deployment | Emitter can be deployed as a Docker container or built and run from source; the maker describes single-server and clustered deployment. | The project provides installation packages for several Linux distributions and source archives; it also documents macOS installation through Homebrew, which it says is currently unmaintained. |
| Product | Emitter is a real-time publish-subscribe messaging service for connecting online devices. | Prosody is an open-source XMPP communication server designed to be easy to set up, efficient with system resources, and extensible. |
| Security | The maker says Emitter supports per-channel authorization policies and SSL/TLS, encrypts network traffic, and does not inspect messages. | Core modules include SSL/TLS encryption support and certificate authentication for server-to-server connections. |
| Support | The maker offers support contracts and directs questions to [email protected] and GitHub issues. | Users can seek help through the project chatroom, user mailing list, or [email protected]. |
| Use cases | The maker describes Emitter for gaming, IoT, web applications, dashboards, visual analytics, and mobile apps. | The project describes setting up an XMPP service for a company, organisation, family, or friends. |
