Google may have started with AppEngine, but that's not how it is today.
Google now has a line-up of products directly competing with equivalent AWS services: VMs (Compute Engine), queueing (Pub/sub), key/value storage (GCS, which even has S3 API compatibility), SQL databases (CloudSQL, Spanner), Redis, document storage (Google Datastore), distributed file system (Filestore, like EFS), big data store (BigQuery), etc.
Google now has a line-up of products directly competing with equivalent AWS services: VMs (Compute Engine), queueing (Pub/sub), key/value storage (GCS, which even has S3 API compatibility), SQL databases (CloudSQL, Spanner), Redis, document storage (Google Datastore), distributed file system (Filestore, like EFS), big data store (BigQuery), etc.