- Tablebed
- Tabletkoulu
- Tag-Go
- Taiga Concept
- Taika3D
- Talas Electric
- Talbit
- Talea
- TalentAdore
- Talentrator
- Tales by Trees
- Taloset
- Tangible Growth
- Tanktwo
- Taom Tips
- Taputa
- TE3 Mobility Training Stick
- TeamFluent
- Team Jolly Roger
- Teamspective
- Teatime Research
- TechLemon
- Temu Materials
- Teraloop
- Terramonitor
- Tespack
- Tesseract Investment
- Te?ted
- The Active Paper Company
- Theatre.js
- ThinkDo
- Tidy Technologies
- Tiitus
- Tikean
- TILT Biotherapeutics
- TimeGate Instruments
- Timespace
- TinyApp
- Tiny Tin Box
- Tippataulu
- Toadkings
- Tohtorille.fi
- Topaasia
- Top Data Science
- Toughbyte
- Trackinno
- Trail Systems
- Trainda
- Traxer
- Treamer
- Tree Men Games
- Treon
- Trestima
- Tribered
- Triumf Gamification
- TrueMed
- Truly Protect
- Trussmatic
- Trustmary
- Tumplate
- Tunnel Ground
- Tutor Tigers
- Twisted Ark
- TwoDads
- Two Men and a Dog