You didn't mention what they're putting in!! If they're putting in their time only, just like you, then you should get 33%.
However, if they're also funding it, paying rent, bills, marketing budget, ...etc, then you have to consider the amount of money they're investing in your calculations.
And, sometimes, there are other things founders can offer in addition to time and money. Does the startup require certain type of connections that they only have? Things like that should also be considered.
However, if they're also funding it, paying rent, bills, marketing budget, ...etc, then you have to consider the amount of money they're investing in your calculations.
And, sometimes, there are other things founders can offer in addition to time and money. Does the startup require certain type of connections that they only have? Things like that should also be considered.