A) Finding interested people. Cold sales is soul crushing and in my case I was unable to find enough leads to feed myself that way.

B) Running a marketing campaign with no idea whether it is lost money, or will at least pay for itself, or will find enough leads to feed myself, or will find enough leads to feed the employees too.

What was the process for finding leads for the cold emails? LinkedIn Sales Navigator? The biggest problem for me when cold emailing is not knowing how many cold emails should I send inorder to gauge the results. I mean the number of people should I reach to know if my cold email campaign is not working.

Yes, Sales Navigator, I haven't found anything else like it.

I have a email find & verify saas app. I am looking to add features that make the entire cold emailing process fast & simple. Here is the mockup of the feature I am planning to push. https://imgur.com/A8heBml What is your first thought on this?

This looks pretty cool. Do you handle the stricter EU laws in some way (e.g. people sign up and confirm they want to be contacted)?

Not at the moment. Currently, we are devoting time to make the feature usable and easy. Right now, we are using data from LinkedIn and then finding their emails so you can send them emails directly from your gmail.