Palo Alto’s got the right idea - the city runs the electricity, gas, water, sewer, and they also have a city-owned fiber internet provider for businesses (which they want to eventually roll out for residential use too). Services are cheaper than other cities where they contract these out to third-party companies, since they’re running them to benefit residents, not to make money.
They do contract out some things (garbage/recycling/compost is contracted to GreenWaste) but not many.