JeopardyLabs — best for no-registration simplicity and library size
JeopardyLabs asks nothing of you. Its own site says building a game is free and requires no registration: you open it, you build a board, you host it. For a lot of people that removes every step between deciding you want a game and having one.
The library is the other half of it. Its homepage currently puts the total at 5 million games, public and browseable, and copying one that is roughly on your topic and editing a few clues is often the fastest route to a game.

What it is, precisely, is a question-and-answer board with a scoreboard attached, and it is intentionally simple. You name each team and the host adds or subtracts points as the round goes. There are no built-in sound effects; its own guidance is to have players shout out or raise hands, or use the separate free Buzzonk buzzer app. Games can be downloaded for offline use, though externally hosted media won't load offline. A lifetime membership is listed at $20 in its FAQ.
Where it loses: every board is written by hand, there is no AI drafting, and every board looks like every other board — its own FAQ says changing colors generally means downloading the game and editing the HTML and CSS yourself.
Use it if: you want the least friction possible, no account, the largest public library, and a low one-time price. Kleveroo vs JeopardyLabs, compared.





