Six Invitational
| Sport | Rainbow Six Siege |
|---|---|
| Founded | 2015 |
| Administrator | Ubisoft |
| No. of teams |
|
| Venue(s) | Rotating locations |
| Most recent champion(s) | FaZe Clan (1st title) |
| Most titles | G2 Esports (2 titles) |
| Broadcaster(s) | Twitch, YouTube |
| Tournament format |
|
| Official website | ubisoft.com/esports/rainbow-six/siege |
Six Invitational (SI) is an annual world championship tournament for the five-on-five esports video game Rainbow Six Siege. Produced by the game's developer Ubisoft, Six Invitational is the final event of the competitive Siege season and consists of 20 teams, 16 based on the final results from the Season Global Standings and four from Europe, North America, Latin America, and Asia Pacific regional qualifiers. SI was first held in Montreal, home of the Ubisoft studio working on the game, until it began to be hosted internationally starting with Six Invitational 2021.
The most recent champion is FaZe Clan, who won Six Invitational 2025 after a runner-up finish the year prior.