Hi, Jed from Golden here. I'm obviously biased, but our query tool is really powerful. :) You can both include specific things in your search, but also exclude specific things. For example, show me companies that went through an accelerator, is in FinTech, but not based in the US or UK. Happy to talk through specific use cases - feel free to reach out directly - jed@golden.com
The real limit is the quality of the data. Wikidata’s (free) query tool is quite powerful but if the knowledge subject you’re interested in is poorly defined the query engine can’t help.