Trim is free to use and they can help you renegotiate your bills like with your cable provider, including Comcast, Time Warner, and Charter. They connect to your accounts, analyze your recurring subscriptions, and identifies areas where you could be saving money. The cable is just the start, they will look at other subscriptions too including your car insurance.
The best part is that they handle the negotiations for you. No more calling Comcast and navigating the phone menu for ages – they do it for you. If you want to cancel, they'll do that for you too.