In SV fundraising deals, going back on a handshake is considered pretty bad behavior. Investors stand to lose many future deals if they break one without a darn good reason. Discovering a serious misrepresentation is such a reason, but seeing a better deal elsewhere is not.
The point of handshake deals is to give everyone time to get the details right, without the pressure of having the deal stolen. Forcing parties to rush through the details damages the whole ecosystem, so everyone is motivated to encourage everyone else to respect handshake deals.
The point of handshake deals is to give everyone time to get the details right, without the pressure of having the deal stolen. Forcing parties to rush through the details damages the whole ecosystem, so everyone is motivated to encourage everyone else to respect handshake deals.