What is the name of the Dota 2 tournament with the largest prize pool in history?

The International 2021 had the largest prize pool in Dota 2 tournament history.

The event, also known as The International 10 or TI10, offered a total prize pool of $40,018,195. It was held in Bucharest, Romania, from October 7 to 17, 2021, with Team Spirit defeating PSG.LGD in the grand final.

The prize pool was built through Dota 2’s community-funded model. Players bought an in-game battle pass, and a portion of the revenue was added to the tournament purse. This system helped The International repeatedly set esports prize-pool records during the 2010s and early 2020s.

The International 2021 was originally expected to be held in 2020, but that edition was postponed because of the COVID-19 pandemic. Although later Internationals continued the series, none exceeded the 2021 total. The tournament’s $40 million purse therefore remains the key record associated with The International.