Different ways to split equity among cofounders Equal splits. Weighted contributions. Dynamic or adjustable equity. Performance-based vesting. Role-based splits. Hybrid models. Points-based system. Prenegotiated buy/sell agreements.
Generally, the choices are to either simply go for an equal equity divide or opt for a weighted split, however there is no definitive right way to proceed. Often it may depends on factors like the level of commitment, expertize or business experience etc of the parties involved.
I hope it's not too late to convince you that the best way to split equity for three founders is to use a dynamic equity split that will allocate equity based on the actual contributions of the three founders while allowing for the possibility that their individual contributions will be different and may vary over time ...