I. Introduction

1. Serverless offering to perform analytics directly against S3 files.
2. Uses SQL to query the files, supports JDBC/ODBC driver.
3. Charged per query and amount of data scanned.
4. Supports CSV, JSON, ORC, Avro and Parquet.
5. It's built on top of Presto.
6. Used in BI scenarios and log management.

II. Athena for SA

1. Operations: serverless so not needed
2. Security: IAM + S3 managed
3. Reliability: managed service, uses Presto, HA
4. Performance: queries scale based on size
5. Cost: pay per query and per TB of data scanned