Amazon EventBridge vs Raystack Stencil

Amazon EventBridge is a serverless event broker for applications that respond to events from applications, SaaS services, and AWS services. Event buses route events across AWS accounts, and subscriptions can combine filters, targets, and retry policies. Buses support tens of thousands of subscribers, retention for up to 365 days, and JSON, Avro, Protobuf, and Cloud Events formats. EventBridge also supports ordered delivery and sharing a bus across accounts in an AWS Organization through AWS Resource Access Manager. Pipes connect endpoints point to point, with optional transformation, filtering, and enrichment. Supported SaaS sources can route events to AWS service targets; listed partners include Adobe, Datadog, MongoDB, Shopify, Stripe, and Snyk. API destinations send events from a bus or pipe to web applications on public or private networks. Monitoring uses CloudWatch metrics, with logging to CloudWatch Logs, S3, or Kinesis Data Firehose. IAM access controls, VPC endpoints, and TLS 1.2 encryption in transit are supported. AWS lists several compliance standards and HIPAA eligibility, while customers retain responsibility for their own compliance obligations.

Raystack Stencil is a schema registry for managing schema definitions and checking data compatibility across applications. It supports Protobuf, Avro, and JSON, and keeps versioned histories of proto descriptor files organized by namespace and name. Uploads receive backward-compatibility checks by default, though some checks can be skipped. The service provides APIs for retrieving the latest version number for a schema name and namespace and downloading the proto descriptors contained in a specified message. Its server offers gRPC and HTTP interfaces, while a CLI can create, view, and search schemas. Listed client libraries cover Java, Go, JavaScript, and Clojure. Clients can download descriptor sets, deserialize Protobuf messages, look up descriptors, and refresh schema definitions with built-in strategies. Stencil can run from a Docker image or be compiled from source, with installation options for macOS, Windows, Linux, OpenBSD, and FreeBSD. The server requires PostgreSQL 13. Refreshing a descriptor after encountering unknown fields is supported only by the Java and Go clients. The project is open source under Apache-2.0.