How do startup founders know when to quit, stick or pivot?

1. By default, you stick. When you ‘stick’ long enough, it might work. If it doesn't, you gather data that proves what you’re doing isn’t working.

2. If there is something that is slightly working, e.g. within the context of one business model component, i.e. a small number of customers like one feature, then you might be able to pivot.

3. Otherwise quit, and free up your time to pursue a better idea.

for more detail check out: https://www.quora.com/How-do-startup-founders-know-when-to-quit-stick-or-pivot/answer/Luke-Szyrmer