Side by side
DataStax Astra Streaming vs Solace PubSub+ Event Broker
Both stand on event streaming platforms. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan APISelf-hostedWeb
A free option and broad connector support make Astra Streaming relevant to teams building Pulsar-based streaming systems. Check shared-cluster limits and connector coverage against your workload before choosing a plan.
Visit DataStax Astra Streaming
Free plan APILinuxSelf-hosted+1
PubSub+ Event Broker combines cross-environment routing with several messaging protocols and deployment forms. Its free software version and trial provide starting options, while cloud tiers have specified capacity ranges.
Visit Solace PubSub+ Event BrokerThe facts
| DataStax Astra Streaming | Solace PubSub+ Event Broker | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | No |
| Runs on | API, Self-hosted, Web | API, Linux, Self-hosted, Web |
| Lowest paid plan | Free or on request | Free or on request |
| Plans published | 2 | 5 |
| Maker | Not published | Not published |
| Website | docs.datastax.com | solace.com |
| On event streaming platforms | #6 of 27 | #10 of 27 |
DataStax Astra Streaming: what it does well
- Supports streaming, pub/sub, queuing, and change data capture.
- Offers a free plan.
- Includes a broad range of source and sink connectors.
- Supports C#, Golang, Java, Node.js, Python, and Spring Boot.
- Connections use authentication, authorization, and TLS.
What to know first
- Custom source and sink connectors are not supported.
- Experimental connectors are not fully supported or tested.
- Shared-cluster throughput guardrail is 5,000 messages per second per topic.
- Private connectivity is unavailable for shared clusters.
Solace PubSub+ Event Broker: what it does well
- Available as a cloud service, software, or appliance
- Supports AMQP, Kafka, MQTT, REST, and WebSocket
- Event mesh routes across clouds and geographies
- Includes dashboards, alerts, and distributed tracing
- Free software version and 30-day cloud trial
What to know first
- Cloud trial lasts 30 days
- Cloud tiers have listed capacity limits
- No stream processing
- No schema registry
Alternatives to DataStax Astra Streaming Alternatives to Solace PubSub+ Event Broker The whole list