Best Solace PubSub+ Event Broker Alternatives in 2026
The top Solace PubSub+ Event Broker alternatives are Apache Kafka, Confluent Cloud and Aiven for Apache Kafka: 15 event streaming platforms our editors would look at instead of Solace PubSub+ Event Broker, in our ranking order.
Solace PubSub+ Event Broker: A protocol-rich event broker for teams building hybrid, multi-protocol event meshes. Where it falls short: delivery is at-least-once rather than exactly-once.
Switching from Solace PubSub+ Event Broker? For most event streaming platforms buyers the best Solace PubSub+ Event Broker alternative is Apache Kafka, built for teams wanting a powerful open-source foundation. On a budget, Aiven for Apache Kafka starts at $35/mo. Amazon Kinesis Data Streams offers the most maximum retention (365 days).
Why People Look for a Solace PubSub+ Event Broker Alternative
- Delivery is at-least-once rather than exactly-once
- Stream processing is not included as an intrinsic capability
- Schema Registry is a separate component, not part of the Event Broker
- No stream processing — 14 of the alternatives below have it
- No schema registry — 13 of the alternatives below have it
Quick Picks by What You Need
- Best overallApache Kafka9.4
Teams wanting a powerful open-source foundation
Visit Apache Kafka - Lowest priceAiven for Apache Kafka9.0
Paid plans from $35/mo
Visit Aiven for Apache Kafka - Best free optionApache Kafka9.4
Has a free plan
Visit Apache Kafka - Most maximum retentionAmazon Kinesis Data Streams8.6
365 days
Visit Amazon Kinesis Data Streams - Best for stream processingApache Kafka9.4
Stream processing (Solace PubSub+ Event Broker: no)
Visit Apache Kafka
All 15 Solace PubSub+ Event Broker Alternatives, Ranked
Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.
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Best forTeams wanting a powerful open-source foundation
- Better than Solace PubSub+ Event Broker:
- Stream processing
- Editor score 9.4 vs 7.0
A deep, self-hosted Kafka foundation for teams prepared to own operations.
- Stream processing
9.4/10★★★★★Visit Apache Kafka -
Best forEnterprises needing governed managed Kafka
- Better than Solace PubSub+ Event Broker:
- Stream processing
- Schema registry
- Editor score 9.2 vs 7.0
A broad managed Kafka platform with strong governance, but a high paid entry price.
- Schema registry
- Stream processing
9.2/10★★★★★Try Confluent Cloud -
Best forTeams wanting affordable managed Kafka
- Better than Solace PubSub+ Event Broker:
- Stream processing
- Schema registry
- Editor score 9.0 vs 7.0
Managed Kafka with a free plan, schema tools, connectors, replication, and hybrid deployment.
- Schema registry
- Stream processing
9.0/10★★★★☆Visit Aiven -
Best forTeams needing Kafka compatibility and many connectors
- Better than Solace PubSub+ Event Broker:
- Stream processing
- Schema registry
- Editor score 8.9 vs 7.0
A hybrid Kafka-compatible platform with broad connectors and advanced streaming controls.
- Schema registry
- Stream processing
8.9/10★★★★☆Visit Redpanda -
Best forAWS teams running managed Apache Kafka
- Better than Solace PubSub+ Event Broker:
- Stream processing
- Schema registry
- Editor score 8.8 vs 7.0
A deep AWS-native Kafka service for teams that need managed streaming infrastructure.
- Schema registry
- Stream processing
8.8/10★★★★☆Visit Amazon MSK -
Best forTeams needing open-source multi-tenant streaming
- Better than Solace PubSub+ Event Broker:
- Stream processing
- Schema registry
- Editor score 8.7 vs 7.0
Open-source streaming with multi-tenancy, replication, storage, and processing built in.
- Schema registry
- Stream processing
8.7/10★★★★☆Visit Apache Pulsar -
Best forAWS teams ingesting high-volume event streams
- Better than Solace PubSub+ Event Broker:
- Stream processing
- Schema registry
- Editor score 8.6 vs 7.0
A flexible AWS-native stream service with usage pricing and at-least-once delivery.
- Schema registry
- Stream processing
8.6/10★★★★☆Visit AWS -
Best forTeams needing hybrid Kafka with a free tier
- Better than Solace PubSub+ Event Broker:
- Stream processing
- Editor score 8.5 vs 7.0
A hybrid Kafka service with a free tier, broad APIs, and Enterprise-only schema management.
- Stream processing
8.5/10★★★★☆Visit site -
Best forGoogle Cloud teams wanting managed Kafka
- Better than Solace PubSub+ Event Broker:
- Stream processing
- Schema registry
- Editor score 8.4 vs 7.0
A managed Kafka service with Google Cloud controls, APIs, and integrated streaming tools.
- Schema registry
- Stream processing
8.4/10★★★★☆Visit Google Cloud -
Best forTeams wanting managed Pulsar with Kafka access
- Better than Solace PubSub+ Event Broker:
- Stream processing
- Schema registry
- Editor score 8.3 vs 7.0
A flexible managed choice for teams moving between Pulsar and Kafka workloads.
- Schema registry
- Stream processing
8.3/10★★★★☆Visit StreamNative -
Best forAzure teams needing Kafka-compatible ingestion
- Better than Solace PubSub+ Event Broker:
- Schema registry
- Editor score 8.2 vs 7.0
A Kafka-compatible event ingestion service for teams invested in Azure.
- Schema registry
8.2/10★★★★☆Try Azure Event Hubs -
Best forTeams already using Astra DB or Pulsar
- Better than Solace PubSub+ Event Broker:
- Stream processing
- Schema registry
- Editor score 8.1 vs 7.0
A managed Pulsar service with broad connectors, CDC, APIs, and a free plan.
- Schema registry
- Stream processing
8.1/10★★★★☆Visit DataStax -
Best forTeams focused on SQL stream processing
- Better than Solace PubSub+ Event Broker:
- Stream processing
- Schema registry
- Editor score 8.0 vs 7.0
A strong fit for teams that need SQL stream processing and continuously updated results.
- Schema registry
- Stream processing
8.0/10★★★★☆Visit RisingWave -
Best forTeams wanting fully managed Kafka operations
- Better than Solace PubSub+ Event Broker:
- Stream processing
- Schema registry
- Editor score 7.9 vs 7.0
A managed Kafka service with broad operational coverage, but pricing requires a sales conversation.
- Schema registry
- Stream processing
7.9/10★★★★☆Visit Instaclustr -
Best forTeams wanting flexible open-source messaging protocols
- Better than Solace PubSub+ Event Broker:
- Stream processing
- Schema registry
- Editor score 7.8 vs 7.0
A broad self-hosted messaging platform for teams that value protocol and deployment flexibility.
- Schema registry
- Stream processing
7.8/10★★★★☆Try Apache RocketMQ
Solace PubSub+ Event Broker Alternatives: Common Questions
What is the best alternative to Solace PubSub+ Event Broker?
Apache Kafka: #1 in our Event Streaming Platforms ranking, with an editor score of 9.4 out of 10. A deep, self-hosted Kafka foundation for teams prepared to own operations.
Is there a free alternative to Solace PubSub+ Event Broker?
Yes. Apache Kafka, Confluent Cloud, Aiven for Apache Kafka, Apache Pulsar and IBM Event Streams have a free plan or a free tier (7 of the 15 alternatives on this page).
What is the cheapest paid alternative to Solace PubSub+ Event Broker?
Of the alternatives here that publish a price, Aiven for Apache Kafka starts lowest, at $35/mo.
Why do people look for Solace PubSub+ Event Broker alternatives?
Delivery is at-least-once rather than exactly-once; Stream processing is not included as an intrinsic capability; Schema Registry is a separate component, not part of the Event Broker.
Which Solace PubSub+ Event Broker alternative has the most maximum retention?
Amazon Kinesis Data Streams, with 365 days.
How do I switch from Solace PubSub+ Event Broker?
Export your data from Solace PubSub+ Event Broker (most tools have an export in their settings). Sign up for the alternative; start on its free plan or trial if it has one. Import your export and set up the integrations your team relies on. Run both side by side for a short while, then cancel Solace PubSub+ Event Broker.
How to Switch from Solace PubSub+ Event Broker
- Export your data from Solace PubSub+ Event Broker (most tools have an export in their settings).
- Sign up for the alternative; start on its free plan or trial if it has one.
- Import your export and set up the integrations your team relies on.
- Run both side by side for a short while, then cancel Solace PubSub+ Event Broker.
Solace PubSub+ Event Broker vs Each Alternative
| # | Tool | Free plan | Paid from | Deployment model | Stream processing | Schema registry | Delivery guarantee | Score |
|---|---|---|---|---|---|---|---|---|
| 23 | Solace PubSub+ Event Broker | Yes | Hybrid | No | No | At-least-once | 7.0 | |
| 1 | Apache Kafka | Free | Self-hosted | Yes | Both | 9.4 | ||
| 2 | Confluent Cloud | Yes | $385/mo | Cloud | Yes | Yes | Both | 9.2 |
| 3 | Aiven for Apache Kafka | Yes | $35/mo | Hybrid | Yes | Yes | Both | 9.0 |
| 4 | Redpanda | No | Hybrid | Yes | Yes | Both | 8.9 | |
| 5 | Amazon Managed Streaming for Apache Kafka | Cloud | Yes | Yes | Both | 8.8 | ||
| 6 | Apache Pulsar | Yes | Free | Self-hosted | Yes | Yes | Both | 8.7 |
| 7 | Amazon Kinesis Data Streams | No | $0.01/unit usage-based | Cloud | Yes | Yes | At-least-once | 8.6 |
| 8 | IBM Event Streams | Yes | Hybrid | Yes | No | Both | 8.5 | |
| 9 | Google Cloud Managed Service for Apache Kafka | No | Cloud | Yes | Yes | Exactly-once | 8.4 | |
| 10 | StreamNative | No | $73/mo | Cloud | Yes | Yes | Both | 8.3 |
| 11 | Azure Event Hubs | No | Cloud | No | Yes | At-least-once | 8.2 | |
| 12 | DataStax Astra Streaming | Yes | Cloud | Yes | Yes | 8.1 | ||
| 13 | RisingWave | No | $0.23/unit usage-based | Hybrid | Yes | Yes | Exactly-once | 8.0 |
| 14 | Instaclustr Managed Apache Kafka | No | Hybrid | Yes | Yes | Both | 7.9 | |
| 15 | Apache RocketMQ | Free | Self-hosted | Yes | Yes | Both | 7.8 |
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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