Quizbowl is a lot like History Bowl! International History Bee and Bowl is a company that runs tournaments very similar to quizbowl. Most of their questions are written by quizbowl writers, and many teams play both their game and ours.
The ONQBA has great relations with the IHBB organizers, and we advertise their tournaments on our website and Facebook group.
A big difference between IHBB and quizbowl is the question topics. IHBB questions are mostly about history, while quizbowl questions are about many different subjects. In a round of quizbowl, you can expect to hear questions on history, science, literature, art, religion, current events, mythology, and some of the social sciences.
A smaller difference is that IHBB events are really two tournaments -- a Bowl and a Bee. In quizbowl, people play all day with their team, answering tossups and bonuses. In an IHBB event, people play most of the day with teams (History Bowl), but they break off and play some rounds as individuals (History Bee).
Another important difference is that quizbowl is generally a nonprofit activity, and quizbowl tournaments are community-run and are very affordable. ONQBA is staffed entirely by volunteers, and almost all our tournaments cost less than $100 per team. Profit from a quizbowl tournament always just goes to the school or club that hosted the tournament.