| Price from | $29/mo | — |
| Free plan | Yes | — |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | — |
| macOS | — | Yes |
| Linux | — | Yes |
| iOS | Yes | Yes |
| Android | Yes | Yes |
| API | Yes | Yes |
| Self-hosted | — | Yes |
| Plans published | 4 | 0 |
| Spec score · Chat APIs | 8.7 (#1) | 7.3 (#28) |
| Integrations | Ably lists integrations including AWS Lambda, Azure Functions, Cloudflare Workers, Google Cloud Functions, Kafka, Zapier, and Terraform. | Prosody supports external XMPP components and server-to-server connections. |
| Product | Ably Chat is a chat API and SDK platform for building realtime chat applications at scale. | Prosody is an open-source XMPP communication server designed to be easy to set up, efficient with system resources, and extensible. |
| Security | Ably states that client-to-server communication is secured by TLS by default and that optional private-key encryption uses 256-bit AES. | Core modules include SSL/TLS encryption support and certificate authentication for server-to-server connections. |
| Support | The Free package includes community and email support on a best-effort basis; Standard lists a one-day email support SLA. | Users can seek help through the project chatroom, user mailing list, or [email protected]. |
| Use cases | Ably describes use cases including live streaming chat, customer service chat, and community in-app chat. | The project describes setting up an XMPP service for a company, organisation, family, or friends. |
