Finding startups in growth phase?

I’m working on a service / product that would cater to tech / finance startups in their growth phase. Not later when they are big, but rather in the middle range, when they are making money and growing.

Question: How do I find a larger number of such startups easily?

I’ve thought of: Google searches? – Any tools to bulk search social media for such startups? – Certain startup directories/ link sites? other options /ideas if available.

P.S. I don’t need to get contacts / email, not that kind of tool. I just need the startup name, ideally the website too, and description of what they do that would later be analyzed / categorized via software.

Thanks for any tips!