Amazon Athena vs s3-lambda: What are the differences?
Amazon Athena: 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; s3-lambda: Lambda functions over S3 objects: each, map, reduce, filter. s3-lambda enables you to run lambda functions over a context of S3 objects. It has a stateless architecture with concurrency control, allowing you to process a large number of files very quickly. This is useful for quickly prototyping complex data jobs without an infrastructure like Hadoop or Spark.
Amazon Athena and s3-lambda can be categorized as "Big Data" tools.
s3-lambda is an open source tool with 1.06K GitHub stars and 43 GitHub forks. Here's a link to s3-lambda's open source repository on GitHub.