AxonOps Schema Registry vs Dataphos Schema Registry
AxonOps Schema Registry
github.com
Dataphos Schema Registry
docs.dataphos.comSide by side
| Figure | AxonOps Schema Registry | Dataphos Schema Registry |
|---|---|---|
| Price from | Free | — |
| Free plan | Yes | — |
| Free trial | — | — |
| Open source | Yes | — |
| Linux | Yes | — |
| API | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 2 | 0 |
| Spec score · Schema Registry Software | 8.6 (#2) | 7.0 (#18) |
| Deployment | The registry is a single statically linked binary of about 50 MB and can run as a Docker container or be built from source. | The Registry and Validator run as deployments in a Kubernetes environment. |
| Maker | The project identifies AxonOps as its maker and links to the AxonOps website. | The documentation identifies Dataphos as a Syntio product. |
| Purpose | AxonOps Schema Registry is an API-compatible replacement for Confluent Schema Registry for managing schemas used with Apache Kafka. | Dataphos Schema Registry manages schemas and validates messages against them. |
| Schema formats | It supports Avro, Protocol Buffers, and JSON Schema. | Validators support JSON, Avro, Protocol Buffers, XML, and CSV. |
Plans
In their own words
AxonOps Schema Registry
AxonOps Schema Registry is a free, Apache 2.0-licensed service for managing Apache Kafka schemas as an API-compatible replacement for Confluent Schema Registry. It handles Avro, Protobuf, and JSON Schema, including references and seven compatibility modes. Schemas can be stored in PostgreSQL, MySQL, or Cassandra, without requiring Kafka as the storage backend. The project says existing Confluent serializers and Java, Go, and Python Kafka clients can connect by changing the registry URL. Security options include Basic Auth, API keys, JWT, LDAP/AD, OIDC, mTLS, four RBAC roles, rate limiting, and TLS certificate auto-reload. Audit events can go to stdout, files, syslog, or webhooks. Client-side field encryption supports DEK/KEK registries and HashiCorp Vault or OpenBao Transit. Data contracts add metadata and rules. A beta MCP server supports several AI clients. It runs self-hosted on Linux, as a Docker container, or from source.
Dataphos Schema Registry
Dataphos Schema Registry is an open-source API and self-hosted service for managing schemas in streaming data systems and validating events in flight. It keeps versioned schema history and exposes a REST API for registering, updating, retrieving, and deleting schemas, plus validity and compatibility checks. Validators support JSON, Avro, Protocol Buffers, XML, and CSV. They work with GCP Pub/Sub, Azure Service Bus, Azure Event Hubs, Apache Kafka, Apache Pulsar, and NATS JetStream, and can support producers and consumers using different protocols. Validation sends passing messages to a valid topic and failures to a dead-letter topic. Compatibility modes include backward, forward, and full variants, with transitive options and NONE; BACKWARD is the default. Validity defaults to FULL, with FULL, NONE, and SYNTAX_ONLY documented. The registry and validators run as Kubernetes deployments, using Shell, Helm, or Pulumi options. The Shell quickstart calls for at least 8 GB of available RAM on cluster nodes. Prometheus is optional for metrics and log monitoring.