Solace PubSub+ Event Broker vs Upstash QStash
| Solace PubSub+ Event Broker | Upstash QStash | |
|---|---|---|
| Free plan | Yes | Yes |
| Free trial | Yes | |
| Paid from | Free | $1/mo |
| Platforms | api, Linux, self-hosted, Web | api, Web |
| Free plan | Yes | Yes |
| Deployment model | hybrid | cloud |
| Stream processing | No | |
| Schema registry | No | |
| Delivery guarantee | at-least-once | |
| Supported client languages | C, C#/.NET, Go, Java, Java RTO, JCSMP, Jakarta Messaging, JavaScript, Node.js, Python, iOS | |
| Delivery guarantees | at_least_once | |
| Dead-letter queues | Yes | |
| Ordering guarantees | per_queue | |
| Maximum message size | 10 MB | |
| Supported protocols | HTTP |
Listed together in Best Message Broker Software