A partial list of major national and international tournaments (that we know of) which have used Tabbycat.
- APU Philosophy CHallenge
- ANU Spring IV
- Australian British Parliamentary Debating Championships
- Australasian Wom*ns Debating Championships
- Asia World Schools Debating Championship
- Asia British Parliamentary Championship
- Borneo British Parliamentary Championship
- Canadian British Parliamentary Championship
- Cambridge Asian Schools BP Championship
- Cambodia United Asian Debating Championship
- China British Parliamentary Championships
- Japan British Parliamentary Championships
- Kings College London IV
- Kuala Lumpur Open Challenge
- KPU Pro Ams
- Malaysian National Intervarsity Debating Championship
- Melbourne Mini
- New Zealand Easters 2017
- New Zealand British Parliamentary Debating Championship
- North East Asia Open
- Swords Mini-Gong
- Shanghai Asian Schools British Parliamentary Debate Championships
- UCD Law Society IV
- UCD Vice President's Cup
- UQ Australs
- UT MARA Open
- Victoria Cup IV
- Western Sydney BP Championship
- Wollongong Easters
- Yale IV
- Sydney Easters
- Joynt Scroll 2016
- Malaysia Debate Open 2016
- New Zealand Easters 2016
- Perth Australs
- Thailand United Asian Debating Championships
- The National Law School Debate
- The Khazak National Schools Debating Championship
- Bali United Asian Debating Championships
- Daejeon Australs
- Joynt Scroll
- Malaysia Debate Open 2015
- New Zealand Easters 2015
- The National Law School Debate
- UNSW/UTS Easters
- Joynt Scroll 2014
- NTU United Asian Debating Championships
- Otago Australs
- Wellington Australs
- Auckland Australs