Side by side
Apache Pulsar vs AxonOps Schema Registry
Both stand on schema registry software. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan APILinuxMac+2
Apache Pulsar combines messaging, streaming, connectors and serverless processing in a self-hosted platform. Enable and configure its security controls before relying on them, and do not use the 5.0.0-M2 milestone in production.
Visit Apache Pulsar Free plan Open source APILinuxSelf-hosted
AxonOps Schema Registry combines broad schema-format support with storage, security and audit options in a self-hosted package. Teams choosing Cassandra need version 5.0 or later, and its MCP server remains beta.
Visit AxonOps Schema RegistryThe facts
| Apache Pulsar | AxonOps Schema Registry | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Yes |
| Runs on | API, Linux, Mac, Self-hosted, Windows | API, Linux, Self-hosted |
| Lowest paid plan | Free or on request | Free or on request |
| Plans published | 1 | 2 |
| Maker | Not published | Not published |
| Website | pulsar.apache.org | github.com |
| On schema registry software | #2 of 26 | #1 of 26 |
Apache Pulsar: what it does well
- Free, open-source software under Apache License 2.0
- Supports under 10 ms consumption latency
- Replicates across regions with automatic client failover
- Built-in connectors cover several data systems
- Tiered storage supports unlimited retention
What to know first
- Security controls are not enabled by default
- 5.0.0-M2 is not meant for production use
AxonOps Schema Registry: what it does well
- Supports Avro, Protobuf and JSON Schema.
- Offers seven compatibility modes.
- Kafka is not needed for schema storage.
- Includes multiple authentication and audit options.
- Free, open source under Apache 2.0.
What to know first
- Cassandra storage requires version 5.0 or later.
- The built-in MCP server is marked beta.
Alternatives to Apache Pulsar Alternatives to AxonOps Schema Registry The whole list