About Amazon Redshift
Ingest to Redshift using ETL or CDC. Extract from Redshift and load to other destinations.
About Google Cloud Spanner
Google Spanner is a Google Cloud-based database system that is ACID compliant, horizontally scalable, and global. Spanner is the database that underpins much of Google’s own data collection, and it has been designed to offer the consistency of a relational database along with the freedom of a non-relational one.