- B2B Pay
- BackedByCFO
- Bad Crane
- Badrap
- BaiaNet
- Bamomas
- Bankify
- Basemark
- BCaster
- Beat2Phone by VitalSignum
- Beely
- Belightful Design
- Bellylabs
- Betolar
- Beyond Logistic
- Bezala
- Big Ear Games
- Binare
- Biomensio
- Bit By Byte Creations
- BIT ODD
- Bitwards
- Black Block
- Black Eye Lens
- Black Smoke Studios
- Blidz
- Blok
- Blokgarden Oy
- Bob W
- Boing
- Boksi
- Bon Games
- Bonus Stage
- BonWell Intelligence
- Bookndo
- Book Salon
- BookTheArtists.com
- Boom Corp
- Boreal Foundry
- Botne
- BouncePoint
- Bout
- Braincare
- BrandBastion
- Breaks Finland
- Brella
- BrightCharger
- Brighterwave
- Brightplus
- Brimstone Interactive
- Brinkhall Sparkling
- Brinter
- BroadBit Batteries
- Broomu Digitals
- BucketList
- Buddy Healthcare
- Buenno Research
- Builderhead
- Buildie
- Buildlink
- BusPay