Amazon MQ vs Upstash QStash
| Amazon MQ | Upstash QStash | |
|---|---|---|
| Free plan | No | No |
| Free trial | No | No |
| Paid from | — | — |
| Open source | No | No |
| Platforms | Web | Web |
| Free plan | No | Yes |
| Deployment model | cloud | cloud |
| Delivery guarantees | configurable | at_least_once |
| Dead-letter queues | Yes | Yes |
| Ordering guarantees | per_queue | per_queue |
| Supported protocols | AMQP, AMQP 0-9-1, AMQP 1.0, JMS, NMS, MQTT, MQTT over WebSocket, OpenWire, STOMP, STOMP over WebSocket, WebSocket | HTTP |
| Maximum message size | — | 10 MB |
Both are listed in Best Message Broker Software. On The Geeks Club, Upstash QStash scores higher on our published basis.