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Solace PubSub+ Event Broker

solace.com

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Spec score 8.2 #6 of 27 in Event Streaming Platforms

What it is

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.

Spec sheet

What it does
Solace Event Broker moves real-time information among applications, AI agents and devices across cloud, on-premises and edge environments.Read 15 Oct 2026 · solace.com
Purpose
The Event Broker streams information among applications, AI agents, and devices across cloud, on-premises, and edge environments.Read 9 Oct 2026 · solace.com
Intended users
The product page describes the broker for enterprises with demanding messaging and streaming needs and for connecting applications, customers, partners, and devices.Read 9 Oct 2026 · solace.com
Deployment
The broker is available as a cloud service, software, or appliance and can run in clouds, data centers, and remote locations.Read 9 Oct 2026 · solace.com
Integrations
Solace offers supported micro-integrations for applications, cloud services, and integration tools.Read 9 Oct 2026 · solace.com
Security
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.Read 9 Oct 2026 · docs.solace.com
Support
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.Read 9 Oct 2026 · solace.com
Headquarters
Ottawa, Ontario, CanadaRead 23 Sep 2026 · solace.com
Founded
2001Read 23 Sep 2026 · solace.com
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.Read 15 Oct 2026 · solace.com
C API
The C messaging API targets C and C++ applications and provides sessions, topic subscriptions and guaranteed queue or topic-endpoint delivery.Read 15 Oct 2026 · docs.solace.com
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.Read 9 Oct 2026 · solace.com
Cloud integrations
Solace documents no-code or low-code integrations for AWS services including SQS, SNS, Kinesis, S3 and Lambda.Read 15 Oct 2026 · solace.com
Cloud service
Solace Cloud is a fully managed service where Solace handles deployment, upgrades, patching and infrastructure operations.Read 15 Oct 2026 · solace.com
Cloud service-level claim
The Solace Cloud product page advertises 99.99% uptime, high availability and multizone replication.Read 15 Oct 2026 · solace.com
Company size and location
LinkedIn lists Solace as privately held, founded in 2001, headquartered in Kanata, Ontario, with 501–1,000 employees.Read 15 Oct 2026 · linkedin.com
Deployment models
The broker is offered as a managed cloud service, self-managed software and hardware appliance, with interoperable form factors.Read 15 Oct 2026 · solace.com
Developer documentation
Official documentation includes API references, integration guides, codelabs, GitHub examples and community support.Read 15 Oct 2026 · docs.solace.com
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.Read 15 Oct 2026 · solace.com
High availability
Solace states that brokers provide high availability and disaster recovery without third-party components, with synchronous or asynchronous replication.Read 15 Oct 2026 · solace.com
Java SDK
Solace publishes a Java messaging client with builders for direct and guaranteed publishers, receivers, queue browsers and messaging services.Read 15 Oct 2026 · docs.solace.com
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.Read 15 Oct 2026 · solace.com
Kubernetes operator
The Kubernetes Event Broker Operator creates and reconciles broker deployments from a PubSubPlusEventBroker custom resource and supports upgrades, repairs and Prometheus monitoring.Read 15 Oct 2026 · github.com
Legal name and owner
Crunchbase identifies the legal name as Solace Corporation and lists Bridge Growth Partners as acquirer.Read 15 Oct 2026 · crunchbase.com
Licence
The Event Broker is proprietary Solace software rather than open source; cloud terms grant limited, non-transferable use rights.Read 15 Oct 2026 · solace.com
Limit: Capterra pricing transparency
Capterra lists pricing as “Get Price” and says no free trial is available on its listing.Read 15 Oct 2026 · capterra.com
Limit: G2 reviewers
G2 reviewers mention a 10 MB message-size limit, batch-message-size restrictions and a learning curve or complexity.Read 15 Oct 2026 · g2.com
Limit: Gartner reviewers
A Gartner reviewer says logs lack detail and requests downloadable Terraform deployment for AWS; initial setup was time-consuming.Read 15 Oct 2026 · gartner.com
Limit: PeerSpot reviewers
PeerSpot complaints include high cost for smaller enterprises, authentication weaknesses, payload-size limits, SSO issues and a need for more inline guidance.Read 15 Oct 2026 · peerspot.com
Messaging features
The platform supports exchange patterns and qualities of service, plus caching, partitioned queues, and replay.Read 9 Oct 2026 · solace.com
Messaging patterns
The product supports publish/subscribe, queuing, request/reply, streaming and replay use cases.Read 15 Oct 2026 · solace.com
Observability
The product includes monitoring with custom dashboards and alerts, and broker-native distributed tracing based on OpenTelemetry.Read 9 Oct 2026 · solace.com
Praise: G2 reviewers
G2 reviewers repeatedly praise scalability, flexible multi-environment deployment, security, filtering, clear flow visibility, maintenance and responsive support.Read 15 Oct 2026 · g2.com
Praise: Gartner reviewers
Gartner review highlights repeatedly describe service stability and reliable support.Read 15 Oct 2026 · gartner.com
Praise: PeerSpot reviewers
PeerSpot reviewers praise scalability, low network latency, event-mesh replication and installation assistance for private-cloud or hybrid deployments.Read 15 Oct 2026 · peerspot.com
Product renaming
Solace announced that PubSub+ became Solace Platform in a product-name update published in 2024.Read 15 Oct 2026 · solace.com
Protocols
Connectivity includes AMQP, JMS, MQTT, REST and WebSocket protocols.Read 15 Oct 2026 · solace.com
Rating on Capterra
0.0 out of 5 from 0 reviewsRead 15 Oct 2026 · capterra.com
Rating on G2
4.4 out of 5 from 7 reviewsRead 15 Oct 2026 · g2.com
Rating on Gartner Peer Insights
4.6 out of 5 from 336 ratingsRead 15 Oct 2026 · gartner.com
Rating on PeerSpot
4.3 out of 5 from 19 reviewsRead 15 Oct 2026 · peerspot.com
REST APIs
PubSub+ Cloud exposes REST APIs for service, account, user, billing and event-broker management, using region-specific API base URLs and bearer tokens.Read 15 Oct 2026 · solace.com
Security compliance
Solace states that its cloud infrastructure complies with GDPR, SOC 2 Type 2 and ISO 27001.Read 15 Oct 2026 · docs.solace.com
Self-hosting
Self-managed software can run across public or private cloud, on-premises, containers and virtual machines.Read 15 Oct 2026 · solace.com
Service security defaults
Solace Cloud event broker services enable secure protocol ports by default and disable plain-text ports by default.Read 9 Oct 2026 · docs.solace.com
Software setup
Solace provides a Docker image and says a local software broker can be created and ports configured with one command.Read 15 Oct 2026 · solace.com
System requirements
The default container broker minimum is two CPUs, 3.4 GiB host virtual memory, 2.5 GiB memory cgroup limit, 1 GB shared memory and 1.5 GB runtime storage.Read 15 Oct 2026 · docs.solace.com
Topic model
Hierarchical topics with wildcards let brokers route only the events required by subscribers.Read 15 Oct 2026 · solace.com

Plans and prices

Event Broker Software Standard Free Full functionality · TLS · AMQP/JMS/MQTT/REST/WebSocket · HA and disaster-recovery replication · 1,000 enterprise/JMS connections Read 15 Oct 2026 · solace.com
Solace Cloud Event Broker Trial Free 30-day trial Cloud event broker service; trial duration is 30 days Read 9 Oct 2026 · solace.com
Solace Cloud trial Free 30-day test drive · Cloud-managed event broker Read 15 Oct 2026 · solace.com
Solace Event Broker Software Free Version Free Free enterprise-grade software version; run-anywhere; IaaS/PaaS-ready Read 9 Oct 2026 · solace.com
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 Read 15 Oct 2026 · solace.com

Every Solace PubSub+ Event Broker plan and price →

Strong points and limits

Strong points

  • Event mesh routes data across clouds and geographies.
  • Available as cloud service, software, or appliance.
  • Supports AMQP, Kafka, MQTT, REST, and WebSocket.
  • Includes dashboards, alerts, and distributed tracing.
  • Free software version and 30-day cloud trial.

Limits

  • Cloud trial lasts 30 days.
  • Maximum listed capacity ranges from 250 to 100,000 connections and queues.
  • Stream processing and schema registry are not included.

Who it suits

The broker is aimed at enterprises with demanding messaging and streaming needs, including those connecting applications, customers, partners, and devices across environments.

Verdict

Solace PubSub+ combines cross-environment messaging with multiple deployment choices, protocols, and observability capabilities. Review the capacity tier and support response options that fit your requirements.

Where Specifiction places it

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