How to split equity and options?

I bet many startups have died because founders failed with this exercise. There are several shortcuts.

Co-founder equity split frameworks:

- https://foundrs.com/

- https://fi.co/system/upload/Embarke-CoFounder-Equity-Split-Template1.xlsx

- https://www.ycombinator.com/library/5x-how-to-split-equity-among-co-founders

Stock vesting. The golden standard is four year vesting period with a one year cliff:

- https://www.cooleygo.com/founder-basics-founders-stock/

- https://startuplawyer.com/incorporation/what-is-four-years-with-a-one-year-cliff

P.S. We have read and used all these tools. The main factors were trust in each other and faith in the project.