DataStax Astra Streaming vs Solace PubSub+ Event Broker
DataStax Astra Streaming
docs.datastax.com
Solace PubSub+ Event Broker
solace.comSide by side
| Figure | DataStax Astra Streaming | Solace PubSub+ Event Broker |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| Linux | — | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 2 | 5 |
| Spec score · Event Streaming Platforms | 7.8 (#13) | 8.2 (#6) |
| Integrations | Included sink connectors support Astra DB and Cassandra, Kafka, AWS Kinesis, Cloud Storage, Elasticsearch, BigQuery, JDBC databases, and Snowflake. | Solace offers supported micro-integrations for applications, cloud services, and integration tools. |
| Security | Shared tenants use Pulsar authentication and authorization alongside Astra organization RBAC, with tenant-scoped roles and permissions. | Solace Cloud states that its infrastructure for customer event broker services, Solace Home Cloud, and the Cloud Console complies with GDPR, SOC 2 Type 2, and ISO 27001. |
| Support | The documentation directs customers to IBM Support for requests such as private connectivity and unavailable regions. | The pricing page lists standard support with 24x7x365 product defect and outage resolution, while Advanced and Advanced+ list response times of 30 and 15 minutes respectively. |
Plans
DataStax Astra Streaming
- Free tierFree
- Paid Astra Streaming plansPriced on request
Solace PubSub+ Event Broker
- Event Broker Software StandardFree
- Solace Cloud Event Broker TrialFree
- Solace Cloud trialFree
- Solace Event Broker Software Free VersionFree
- Event Broker Software EnterprisePriced on request
In their own words
DataStax Astra Streaming
DataStax Astra Streaming is a managed cloud service for streaming data and processing event streams, powered by Apache Pulsar. It provides messaging for streaming, publish-subscribe workflows, and queuing, and supports real-time event processing and change data capture. Users manage Pulsar tenants and resources such as topics, connectors, functions, and subscriptions through the Astra Portal, APIs, or related tools. Applications connect through open-source Apache Pulsar client APIs; the service runs Pulsar 3.1 and recommends that API version or higher. Included connectors cover Astra DB and Cassandra, Kafka, AWS Kinesis, Cloud Storage, Elasticsearch, BigQuery, JDBC databases, Snowflake, and selected source systems including Debezium-supported databases. Connections use authentication, authorization, and TLS. Shared clusters have defined tenant, namespace, topic, message-size, and throughput limits. Custom source and sink connectors are not supported, and experimental connectors are not fully supported or tested. A free tier is listed at free; paid pricing is usage-based and varies by region and usage.
Solace PubSub+ Event Broker
Solace PubSub+ Event Broker streams information among applications, AI agents, and devices across cloud, on-premises, and edge environments. Multiple brokers can form an event mesh to route data across clouds, data centers, and geographies. It is offered as a cloud service, software, or appliance, for deployment in clouds, data centers, and remote locations. Messaging features include exchange patterns, qualities of service, caching, partitioned queues, and replay. Supported protocols include AMQP, Kafka, MQTT, REST, and WebSocket, alongside APIs for programming languages. Solace offers supported micro-integrations for applications, cloud services, and integration tools. Monitoring includes custom dashboards and alerts, and distributed tracing is broker-native and based on OpenTelemetry. Cloud services enable secure protocol ports by default and disable plain-text ports by default. Free options include a 30-day cloud trial and a free enterprise-grade software version. Solace was founded in 2001 and is headquartered in Ottawa, Ontario, Canada.