Heroic vs Pouchdb: What are the differences?

Developers describe Heroic 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. On the other hand, Pouchdb is detailed as "Open-source JavaScript database inspired by Apache CouchDB that's designed to run well within the browser". PouchDB enables applications to store data locally while offline, then synchronize it with CouchDB and compatible servers when the application is back online, keeping the user's data in sync no matter where they next login.

Heroic and Pouchdb can be primarily classified as "Databases" tools.

Some of the features offered by Heroic are:

• heroic-core contains the com.spotify.heroic.HeroicCore class which is the central building block for setting up a Heroic instance.
• heroic-elasticsearch-utils is a collection of utilities for interacting with Elasticsearch. This is separate since we have more than one backend that needs to talk with elasticsearch.
• heroic-parser provides an Antlr4 implementation of com.spotify.heroic.grammar.QueryParser, which is used to parse the Heroic DSL.

On the other hand, Pouchdb provides the following key features:

• Cross browser compatibility
• Lightweight
• Easy to learn

Heroic and Pouchdb are both open source tools. It seems that Pouchdb with 12.1K GitHub stars and 1.21K forks on GitHub has more adoption than Heroic with 710 GitHub stars and 89 GitHub forks.