I buy direct API access to the upstream data providers that power Semrush, Ahrefs, and BrightLocal. These are the raw data feeds, with no sampling limits and no filtering or data aggregation. I currently have a pipeline running 600 million records per month. Everything is stored in a production data warehouse (BigQuery) and the raw captures are cleaned and entity-resolved, then modeled for analysis and reporting.
The data includes organic SERPs, Google Maps geo-grid rankings, backlink profiles, citations, on-page crawls, keyword demand, and competitor visibility.
I have made an initial version of this for BB Builders Pro, with a full geo-grid of all of your competitors from Arlington to Lacey.
I have also made an SEO dashboard for BB Builders.