Scorbit is a company started by a friend of mine that I have been assisting with a bit of integration development. Long story short, Scorbit will keep track of high scores submitted via it’s mobile app and make online leaderboards like below. The best part is, the app is free and so is creating an account.
Scorbit also offers a dedicated piece of hardware, called a Scorbitron, that gets installed into your pinball machine that can push live gameplay updates including player score, ball number, mode data (for certain games), and a bunch of other really cool stuff.
More info about them can be found here: https://scorbit.io/
Check out the leaderboards that I have made below:
Global Total Nuclear Annihilation Leaderboard
Global Rick and Morty Leaderboard