- Habito Health
- Hahmota
- Hailer
- Hakema
- Haltian
- Haltu
- Hamina Wireless
- Happeo
- Happo Solutions
- Happy or Not
- Happy Plant Protein
- HappySignals
- Harald AI
- Harhama Games
- Harrison Bikes
- Haruworks
- Hashlist
- Havainne
- HeadAI
- Headnought
- Headsted
- HealthFOX
- Health Puzzle
- Healthzilla
- Heart2Save
- Heat Ledger
- Heely
- Heeros Systems
- HeiaHeia
- Hei.io
- HEI Schools
- Heliostorage
- Hello Hobby
- Hello Ruby
- Helmee Imaging
- Helppohinta
- Helppy
- Helpten
- Helsieni
- Helsinki Distilling Company
- Helsinki Noir
- Hempuli
- Herkkä Snacks
- Hexlet
- Heychain
- Hi5 Solution
- Hibox Systems
- High Way of Life
- Hiil Ltd.
- Hiisi
- Hiisi Homes & Hotels
- HitSeed
- Hiven
- HMD
- Hoivanet
- Hoiwa
- Hokkari
- Homie Labs Oy
- Hookle
- Hopoti
- Horseteq
- Hortimill
- Hostaway
- Hoteljoy
- Hotelway
- Hotspot.fm
- Howspace
- Hoxhunt
- HTM Solutions
- https://www.vertaaensin.fi/
- Hublet
- Huikea
- Hukka
- Humbol
- Hunome
- HUONE
- Huuva
- Hycail
- Hycamite
- Hydrohex
- Hyper ICT
- Hyperin
- Hyperion Robotics
- Hyperkani
- Hypermemo
- Hytrade