Solace PubSub+ Event Broker
Solace PubSub+ Event Broker moves information among applications, AI agents, and devices across cloud, on-premises, and edge environments.
What Solace PubSub+ Event Broker is
Solace PubSub+ Event Broker moves information among applications, AI agents, and devices across cloud, on-premises, and edge environments. Brokers can be linked into an event mesh to route data across clouds, data centers, and geographies. The product is offered as a cloud service, software, or appliance, with hybrid deployment across clouds, data centers, and remote locations. Messaging capabilities include exchange patterns, qualities of service, caching, partitioned queues, and replay. Supported protocols include AMQP, Kafka, MQTT, REST, and WebSocket, alongside programming-language APIs and supported micro-integrations. Monitoring includes custom dashboards and alerts, plus broker-native distributed tracing based on OpenTelemetry. Cloud services enable secure protocol ports by default and disable plain-text ports by default. The listed free options are a 30-day cloud trial and a free enterprise-grade software version. Solace was founded in 2001 and is headquartered in Ottawa, Ontario, Canada. The product is described for enterprises with demanding messaging and streaming needs.
Good
- Supports AMQP, Kafka, MQTT, REST, and WebSocket.
- Available as a cloud service, software, or appliance.
- Includes dashboards, alerts, and OpenTelemetry-based tracing.
- Free software version and 30-day cloud trial are listed.
Watch out
- Cloud trial lasts 30 days.
- Listed delivery guarantee is at-least-once.
- No stream processing or schema registry.
Who it suits
It suits enterprises connecting applications, customers, partners, and devices across cloud, on-premises, or edge environments. Teams needing event routing across multiple locations may also find its event mesh relevant.
Verdict
Solace PubSub+ Event Broker offers several deployment forms, protocols, and event-routing capabilities for distributed messaging. Review capacity tiers and support response-time options to determine whether they fit your requirements.
Plans and prices
From Solace PubSub+ Event Broker's own pricing page, checked 15 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Event Broker Software Standard | Free | Full functionality · TLS · AMQP/JMS/MQTT/REST/WebSocket · HA and disaster-recovery replication · 1,000 enterprise/JMS connections |
| Solace Cloud Event Broker Trial | Free | Cloud event broker service; trial duration is 30 days · 30-day trial |
| Solace Cloud trial | Free | 30-day test drive · Cloud-managed event broker |
| Solace Event Broker Software Free Version | Free | Free enterprise-grade software version; run-anywhere; IaaS/PaaS-ready |
| Event Broker Software Enterprise | Priced on request | Licensed per core · Full functionality · TLS · AMQP/JMS/MQTT/REST/WebSocket · HA and disaster-recovery replication · 30,000 enterprise/JMS connections |
The facts
Each one read from Solace PubSub+ Event Broker's own pages, with the date it was checked.
What it does
- API support lifecycle
- Solace publishes end-of-support dates for messaging API versions, including API 7.23 ending September 26, 2026 and API 7.24 ending December 16, 2026.checked 15 Oct 2026
- Capacity limits
- Cloud tiers range from ENT-250 to ENT-100K, with maximum concurrent connections and queues listed from 250 to 100,000 and configurable storage up to 6 TB.checked 9 Oct 2026
- C API
- The C messaging API targets C and C++ applications and provides sessions, topic subscriptions and guaranteed queue or topic-endpoint delivery.checked 15 Oct 2026
- Cloud integrations
- Solace documents no-code or low-code integrations for AWS services including SQS, SNS, Kinesis, S3 and Lambda.checked 15 Oct 2026
- Cloud service
- Solace Cloud is a fully managed service where Solace handles deployment, upgrades, patching and infrastructure operations.checked 15 Oct 2026
- Cloud service-level claim
- The Solace Cloud product page advertises 99.99% uptime, high availability and multizone replication.checked 15 Oct 2026
- Deployment
- The broker is available as a cloud service, software, or appliance and can run in clouds, data centers, and remote locations.checked 9 Oct 2026
- Deployment models
- The broker is offered as a managed cloud service, self-managed software and hardware appliance, with interoperable form factors.checked 15 Oct 2026
- Developer documentation
- Official documentation includes API references, integration guides, codelabs, GitHub examples and community support.checked 15 Oct 2026
- Event mesh
- Dynamic Message Routing automatically propagates subscriptions and events between Solace brokers so applications can share data across environments as if attached to one broker.checked 15 Oct 2026
- High availability
- Solace states that brokers provide high availability and disaster recovery without third-party components, with synchronous or asynchronous replication.checked 15 Oct 2026
- Integrations
- Solace offers supported micro-integrations for applications, cloud services, and integration tools.checked 9 Oct 2026
- Intended users
- The product page describes the broker for enterprises with demanding messaging and streaming needs and for connecting applications, customers, partners, and devices.checked 9 Oct 2026
- Java SDK
- Solace publishes a Java messaging client with builders for direct and guaranteed publishers, receivers, queue browsers and messaging services.checked 15 Oct 2026
- Kafka integration
- An integrated Kafka Bridge runs inside the software broker and can be configured through the GUI, CLI or SEMP API for bidirectional messaging.checked 15 Oct 2026
- Kubernetes operator
- The Kubernetes Event Broker Operator creates and reconciles broker deployments from a PubSubPlusEventBroker custom resource and supports upgrades, repairs and Prometheus monitoring.checked 15 Oct 2026
- Licence
- The Event Broker is proprietary Solace software rather than open source; cloud terms grant limited, non-transferable use rights.checked 15 Oct 2026
- Limit: Capterra pricing transparency
- Capterra lists pricing as “Get Price” and says no free trial is available on its listing.checked 15 Oct 2026
- Limit: G2 reviewers
- G2 reviewers mention a 10 MB message-size limit, batch-message-size restrictions and a learning curve or complexity.checked 15 Oct 2026
- Limit: Gartner reviewers
- A Gartner reviewer says logs lack detail and requests downloadable Terraform deployment for AWS; initial setup was time-consuming.checked 15 Oct 2026
The company
- Company size and location
- LinkedIn lists Solace as privately held, founded in 2001, headquartered in Kanata, Ontario, with 501–1,000 employees.checked 15 Oct 2026
- Founded
- 2001checked 23 Sep 2026
- Headquarters
- Ottawa, Ontario, Canadachecked 23 Sep 2026
- Legal name and owner
- Crunchbase identifies the legal name as Solace Corporation and lists Bridge Growth Partners as acquirer.checked 15 Oct 2026
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