DalmatinerDB vs Heroic: What are the differences?

Developers describe DalmatinerDB as "A fast, distributed metric store". DalmatinerDB is a no fluff purpose built metric database. Not a layer put on top of a general purpose database or datastore. On the other hand, Heroic is detailed as "A scalable time series database based on Cassandra and Elasticsearch, by Spotify". Heroic is Spotify's in-house time series database. It was built to address the challenges Spotify was facing with near real-time data collection and presentation at scale.

DalmatinerDB and Heroic can be categorized as "Databases" tools.

DalmatinerDB and Heroic are both open source tools. Heroic with 710 GitHub stars and 89 forks on GitHub appears to be more popular than DalmatinerDB with 696 GitHub stars and 45 GitHub forks.