- Hahmota
- Haja Networks
- Hakema
- Halax
- Haltian
- Haltu
- Happo Solutions
- Happy Hobgoblin
- HappySignals
- Harald AI
- Harrison Bikes
- Haruworks
- Hatch
- Havainne
- Havina Productions
- HeadAI
- Headnought
- Headsted
- HealthFOX
- Healthgamer
- Health Invest Finland
- Healthoperator
- Health Puzzle
- Health Revolution
- Heat Ledger
- Heavyweight Rex
- Hefio
- Heimo
- Hello Hobby
- Hello Ruby
- Helmee Imaging
- Helsieni
- Helsinki Distilling Company
- Helsinki Noir
- Helsinki Wildfoods
- Heltti
- HempRefine
- Herdifier
- Hexlet
- Heya
- Hi5 Solution
- High Way of Life
- Hiisi
- HipFire Games
- HitSeed
- HMD
- HobbyDeed
- Hoivanet
- Hokkari
- Hokkari Vision
- Holda
- Hookle
- Horseteq
- Hostaway
- Host My Pet
- Hoteljoy
- Hotspot.fm
- Hublet
- Huijaus Studios
- huimio
- Humia
- HUOLETI
- HUONE
- Huoneistostudio
- Huuuge Games
- HV Cable Solutions Oy
- Hydrohex
- Hypermemo