Hadron vs Keen Product Analytics

Hadron is an open-source, self-hosted distributed data-storage and messaging system for ingesting events and coordinating multi-stage workflows. Streams are append-only logs with absolute ordering within each partition and horizontal scaling. Pipelines orchestrate stages over Stream data and can begin when an event matches a configured trigger. Exchanges handle ephemeral messages, while Endpoints provide general-purpose RPC handlers. Streams, pipeline inputs and outputs, and ephemeral messages use the CloudEvents 1.0 model. Hadron is designed for Kubernetes and installed with Helm and Kubernetes configuration resources; the quick start requires Helm 3.7.0 or later for OCI usage. Stream availability continues while at least one partition runs. Retention can use a configurable time policy, defaulting to seven days, or retain data indefinitely. Producers and Consumers may be written in any language, with an official Rust client and CLI. Components expose Prometheus metrics over HTTP, including Prometheus scraping and OTEL collector integrations. Token-based access creates JWTs signed by the Operator’s private RSA key, with resource-level permissions. External CLI access is still in progress, and Hadron Cloud is under construction.

Keen Product Analytics has no write-up on Specifiction yet; its figures are above.