- Toyota Motor Europe
- TPH Company
- TrackTik
- Train Lodge Hostel Amsterdam
- transact Elektronische Zahlungssysteme GmbH dba. epay
- Transcend Information Europe BV
- Transearch International
- Transfer Multisort Elektronik B.V.
- TranslationServices.com
- TransPerfect
- Transus
- TravelBird
- Travis Road Services
- Treety
- Trek Bikes
- Trengo
- Tres Griferia
- Tri-Sure
- Triferto Bv
- TriGlobal
- TriGlobal B.V.
- Triip
- Trimble
- Trinseo Netherlands
- TripsByTips
- Triumph
- Tröger & Cie. Aktiengesellschaft
- TROI Studio
- Troy Chemical Company B.V.
- Troy Chemical Company BV
- TROY Chemie GmbH
- Troy Moerdijk B.V.
- True Price
- Truphone
- Truphone B.V.
- Trust in Soda
- Try Catch
- Trymax Semiconductor Equipment B.V.
- TTI Inc.
- TU Eindhoven University of Techology
- Tubble
- Tulip Inn Media Park Hilversum
- tups & tups management consultants
- Turn Key Pipeline Services B.V.
- Tuuum
- TÜV Informationstechnik GmbH