There are many home care options, and knowing the differences between the different types of services and service providers can aid you in making the right decision.
The post the fare schedule for each city on their website. e.g. here is Lyft Boston $2.25 + $1.50 per mile and $.30 per minute. It's hard to say what a typical ride is. In my experience Lyft is always cheaper than a Boston cab. UberX is sometimes cheaper as long as surge pricing is not turned on.
Lyft's monthly passes lower the cost of your carpooling. The experiment is more affordable than paying for rides one at a time. Carpooling services such as Lyft Line and UberPool already make ridesharing more affordable, but it's about to get cheaper -- if you're willing to pay in advance. Lyft is testing monthly Line passes that give you a significant discount, and save you from worrying about delays or Prime Time (aka surge pricing). The first pass is for less frequent riders: pay $20 and every Line ride after that costs $2.