| Price from | $10/mo | $99/mo |
| Free plan | Yes | — |
| Free trial | — | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | Yes | — |
| Linux | Yes | — |
| iOS | — | Yes |
| Android | — | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 2 | 4 |
| Spec score · Chat APIs | 8.4 (#4) | 7.9 (#16) |
| Deployment | Emitter can be deployed as a Docker container or built and run from source; the maker describes single-server and clustered deployment. | Enterprise customers can deploy Sceyt on premises in a private cloud, with AWS, Azure, Oracle, and Google listed as options. |
| Messaging | Publishers send messages to channels, and subscribers receive copies in real time. | The platform supports one-to-one chat, group chat, and broadcast channels designed to reach millions of users. |
| Product | Emitter is a real-time publish-subscribe messaging service for connecting online devices. | Sceyt is a customizable in-app chat API with pre-built UI kits for websites and apps. |
| Security | The maker says Emitter supports per-channel authorization policies and SSL/TLS, encrypts network traffic, and does not inspect messages. | Sceyt says it uses TLS 1.3 encryption in transit and AES encryption at rest, and lists SOC 2 compliance. |
| Support | The maker offers support contracts and directs questions to [email protected] and GitHub issues. | The Free plan lists support within 24 hours, Starter has 8/5 support, Growth has 8/5 priority support, and Enterprise has 24/7 priority support. |
