| Price from | $29/mo | $0.01/mo |
| Free plan | Yes | Yes |
| Free trial | — | Yes |
| 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 | 3 |
| Spec score · Chat APIs | 8.7 (#1) | 8.4 (#5) |
| Spec score · Chat Api | 8.7 (#1) | 8.4 (#4) |
| Compliance | Ably states it completes SOC 2 Type 2 audits, offers HIPAA BAA agreements, and is EU GDPR-compliant. | The maker says self-hosting keeps data within the customer’s jurisdiction and enables meeting GDPR, HIPAA, ISO 27001, SOC 2, and PIPEDA requirements. |
| Headquarters | London, UK | San Francisco, USA |
| Messaging features | Chat supports one-to-one and group conversations, message editing and deletion, typing indicators, presence, read receipts, and reactions. | Messaging supports one-to-one and group chats, media, delivery and read receipts, typing indicators, online presence, offline messaging, and message scheduling. |
| Product | Ably Chat is a chat API and SDK platform for building realtime chat applications at scale. | mesibo is a real-time communication platform for adding messaging, voice and video calls, and conferencing to apps, available on cloud or self-hosted infrastructure. |
| Support | The Free package includes community and email support on a best-effort basis; Standard lists a one-day email support SLA. | The support center offers help categories for technical issues, requirements checks, demos, compliance and data residency, uptime and SLA, pricing, and scheduling a call. |
