- Hahmota
- Hakema
- Haltian
- Haltu
- Hamina Wireless
- Happo Solutions
- Happy or Not
- HappySignals
- Harhama Games
- Harrison Bikes
- Hashlist
- Havainne
- HeadAI
- Headnought
- Headsted
- HealthFOX
- Health Puzzle
- Heart2Save
- Heeros Systems
- HeiaHeia
- HEI Schools
- Hello Hobby
- Hello Ruby
- Helmee Imaging
- Helppohinta
- Helpten
- Helsinki Distilling Company
- Helsinki Noir
- Hempuli
- Hexlet
- Heychain
- Hibox Systems
- High Way of Life
- Hiil
- Hiisi
- HitSeed
- Hiven
- HMD
- Hobbly
- Hoivanet
- Hoivita
- Hokkari
- Horseteq
- Hostaway
- Hoteljoy
- Hotspot.fm
- Hovi
- Howspace
- HTM Solutions
- Hublet
- Huikea
- Hukka
- HUONE
- Huuva
- Hycail
- HyCom Core
- Hydrohex
- Hyper ICT
- Hyperin
- Hyperkani
- Hypermemo
