Amazon Athena vs CDAP: What are the differences?
Developers describe Amazon Athena as "Query S3 Using SQL". Amazon Athena is an interactive query service that makes it easy to analyze data in Amazon S3 using standard SQL. Athena is serverless, so there is no infrastructure to manage, and you pay only for the queries that you run. On the other hand, CDAP is detailed as "Open source virtualization platform for Hadoop data and apps". Cask Data Application Platform (CDAP) is an open source application development platform for the Hadoop ecosystem that provides developers with data and application virtualization to accelerate application development, address a broader range of real-time and batch use cases, and deploy applications into production while satisfying enterprise requirements.
Amazon Athena and CDAP can be primarily classified as "Big Data" tools.
CDAP is an open source tool with 346 GitHub stars and 178 GitHub forks. Here's a link to CDAP's open source repository on GitHub.