A selection of companies HumDrumm Animation Studios has worked for:
- UNIT COMMUNICATIONS
- COSGROVE HALL FILMS
- MELLO MEDIA
- BURST PROOF BUBBLE
- ANYTIME AFTER NINE
- WARTHOG
- TRAVELLERS TALESs
- ROCKSTAR GAMES
- LEGO
- REALTIME UK
- KILOGRAMME
- EA GAMES
- DISNEY
- WARNER BROTHERS INTERACTIVE ENTERTAINMENT
- NICKTOONS
- 19 HERTZ
- LYNCHPIN PRODUCTIONS