No. There's no additional cost for enabling Lambda SnapStart. You are charged based on the number of requests for your functions and the duration your code executes based on current Lambda Pricing. Duration charges apply to code that runs in the handler of a function and runtime hooks, as well as initialization code that is declared outside of the handler. Please note that AWS Lambda may periodically recycle execution environments with security patches and rerun your initialization code. For more details, see the Lambda Programming Model documentation.