Roku was originally a project within Netflix called "Project:Griffin" but it spun off into its own company. Now, it's often hailed as the best streaming player for TVs, offering a complete, fast, and reliable experience. It's a great choice of a device for cord-cutters.
Almost every major live TV streaming app is available on Roku: Philo, Sling, Fubo, Frndly TV, Pluto TV, Xumo, Hulu with Live TV, and DirecTV Stream. These are all great cable alternatives, but from this list, you can find which one works best for you.