| Price from | $29/mo | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | — | Yes |
| macOS | — | Yes |
| Linux | — | Yes |
| iOS | Yes | Yes |
| Android | Yes | Yes |
| API | Yes | Yes |
| Self-hosted | — | Yes |
| Plans published | 4 | 2 |
| Spec score · Chat APIs | 8.7 (#1) | 7.9 (#15) |
| Spec score · Chat Api | 8.7 (#1) | 7.8 (#14) |
| SDKs | The Chat page shows JavaScript, React, Swift, and Kotlin SDK examples. | PrivChat provides first-class Rust, TypeScript, and Kotlin SDKs implementing the same wire protocol. |
| Security | Ably states that client-to-server communication is secured by TLS by default and that optional private-key encryption uses 256-bit AES. | Server security includes TLS 1.3, QUIC and wss transport, RS256 signing with JWKS, token revocation, bcrypt password hashing, rate limits, privacy policies, and IP protection. |
| Support | The Free package includes community and email support on a best-effort basis; Standard lists a one-day email support SLA. | Community support is provided through GitHub issues and discussions, while commercial engagements add SLAs, dedicated channels, training, and engineering support. |
