- Hailer
- Hamina Wireless
- Happeo
- HappySignals
- Harald AI
- Harhama Games
- Harrison Bikes
- Haruworks
- Hashlist
- Hatch
- HeadAI
- Headsted
- HealthFOX
- Healthzilla
- Heart2Save
- Heat Ledger
- Heavyweight Rex
- Heely
- Hei.io
- HEI Schools
- Heliostorage
- Hello Ruby
- Helmi Games
- Helppy
- Helsieni
- Helsinki Wildfoods
- Hempuli
- Herkkä Snacks Oy
- Hexlet
- Heychain
- Hi5 Solution
- Hiil Ltd.
- Hiisi Homes & Hotels
- HMD
- HobbyDeed
- Hoivanet
- Hoiwa
- Hookle
- Hopoti
- Horseteq
- Hortimill
- Hostaway
- Hotelway
- Hoxhunt
- https://www.vertaaensin.fi/
- Hublet
- Hukka AI Oy
- Humbol
- Hunome
- Huuva
- Hycamite
- Hydrohex
- Hyperion Robotics