By “success”, assume the obvious metrics - revenues, profits, market cap. Given the answer can be proved by numbers, that’s why I put this in GQ… but if it’s moved, no big deal.
“Non-Tech” is a bit harder. Like pornography, I’ll know it when I see it.
Cannot be a company which was the result of merger and acquisitions activity, spin offs, etc. (OTOH, if the founder gets laid off from a job, says “I can do better than that”, and builds a $3 billion empire from scratch, that counts. But if the founder got the company via a spinoff of an already extant operation… no.)