I am currently using both GCP and AWS for a certain project. While each cloud providers provides very nice tool and visualizations for their own spending (Cloud billing for GCP and Cost&Usage report for AWS respectively), I wanted to consolidate both cloud providers usage report and visualize using single BI tool. The report does not need to be realtime, I only need daily granularity on my report. (No streaming)
So I had to spin up something and these were couple options
I am a big fan of BigQuery and I prefer to to ELT rather than ETL on BQ. Moreover, I was already using BigQuery for the project with holistics.io, I chose to house usage and cost data to bigquery.
This is easy, cloud billing natively support bigquery export.