Amazon Redshift Spectrum vs EventQL: What are the differences?
Developers describe Amazon Redshift Spectrum as "Exabyte-Scale In-Place Queries of S3 Data". With Redshift Spectrum, you can extend the analytic power of Amazon Redshift beyond data stored on local disks in your data warehouse to query vast amounts of unstructured data in your Amazon S3 “data lake” -- without having to load or transform any data. On the other hand, EventQL is detailed as "The database for large-scale event analytics". EventQL is a distributed, column-oriented database built for large-scale event collection and analytics. It runs super-fast SQL and MapReduce queries.
Amazon Redshift Spectrum and EventQL can be categorized as "Big Data" tools.
EventQL is an open source tool with 1.02K GitHub stars and 91 GitHub forks. Here's a link to EventQL's open source repository on GitHub.