0 for 10 on some startups (large and small, YC and not) that came to mind.

It's easy to scrape YC startups from https://www.ycombinator.com/companies. Scrape that and a dozen other investors' portfolio pages and you'll have a useful fraction of startups.

Sounds good! its just I used up most of my API key limits in development, and I'm keeping some so I can run improvement pipelines or fix errors, so il batch the YC companies day by day, there's 5000 companies, so il do about 800 each day for 5-6 days.

Same here. I work with a lot of startups, some of them very prominent and none of them are listed.