Seeking Companies Using SemRush in the US and Canada

Hey everyone, I am looking for a list of companies in the US and Canada that use SemRush. I don't already have a list-- for that I would just run the find tech stack enrichment. I want to find all companies currently using Semrush. I see TheirStack has a list of 8k in the US and 1k in Canada-- but it's super expensive. Builtwish only has 200 in the US listed. Any ideas here? Any ways to pull this data in Clay or scrape somehow? Thanks!