Flip the scenario: you are offered $X to do a speaking engagement that is not speaking against your company (if anything, it is promoting your company) Why sho

Flip the scenario: you are offered $X to do a speaking engagement that is not speaking against your company (if anything, it is promoting your company) Why should the company get paid for what you are doing off company time? So long as what is being asked is neither unethical nor illegal, I see no reason to be upset of your cofounder's [possible] success as speaker. Good for him! If it is taking away from the company for him to do it, then maybe renegotiate equity %%, salary expectations, etc - but so long as it is not, then it is functionally no different than if he were working as a tennis pro on the weekends