| Price from | $400/mo | €200/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 | 3 | 3 |
| Spec score · Chat APIs | 8.2 (#7) | 8.7 (#2) |
| Founded | 2020 | 2002 |
| Headquarters | Toronto, Canada | Paris, France |
| Integrations | The architecture supports optional push providers, object storage, customer webhooks, existing interfaces, and an open-source integration layer. | The maker lists PostgreSQL, MySQL, Redis, and LDAP as storage backends. |
| Product | ChatKitty provides a production-ready messaging core with open-source integrations for marketplace and community products. | ejabberd is an open-source server for XMPP messaging, MQTT, SIP, and Matrix. |
| Security | Chat Functions run in a secure cloud environment and can implement custom authentication logic, including Firebase token verification. | The maker describes TLS 1.3, modern cipher suites, SASL with SCRAM-SHA-256, and OMEMO end-to-end encryption as available on a fresh install. |
| Support | The launch sprint includes production planning, release support, and 14 days of post-launch defect correction for the agreed scope. | Community Server includes community forums and documentation, while Business Edition and Fluux include direct ProcessOne support and LTS releases. |
