- PHT
- Phthisis Diagnostics
- Phu Concepts
- Phunky
- phunnl
- Phunware
- Phurnace Software
- Phuser
- Phusion
- Phuthuma Nathi
- Phy
- Phybridge
- Phyen
- PhyFlex Networks
- Phyfun Games
- Phykon Solutions
- Phylagen
- Phyletic Systems
- Phylogix
- Phylogy
- Phylos
- Phynd Technologies
- Phyode
- Phyramid
- Phyre
- Phyre Technologies
- Physcient
- Physera
- Physi
- Physic Ventures
- Physical Interaction Lab
- Physical Liquid
- Physical Sciences
- Physician Billing Partners
- Physician Computer Network
- Physician Software Systems
- Physician Verification Services
- Physician WebLink
- Physicians Advisory GroupInc
- Physicians Immediate Care
- Physicians Interactive
- Physicians Reference Laboratory
- Physicians Weekly
- Physics Classroom
- Physics World
- Physio-Control
- PhysioCue
- PhysioHealth
- Physiomics
- PhysioSonics
- Physiowave
- Physiq
- Physorg
- Phystech Ventures
- PhytaLab
- PHYTEC
- Phytech
- Phytel
- Phytelligence
- Phyto
- PhytoCeutica
- Phytoceuticals
- Phytomedics
- Phytonix
- PhytoSynthetix
- Phyve
- Phyworks
- Phyxion
- Phyzios
- Phyzit
- Phyzseek: The Fitness App That Motivates You to Transform Your Body
- PI
- Pi Axis Technologies
- Pi Campus
- Pi Datacenters
- PI digi-logical Solutions
- Pi Labs
- Pi Slice
- Pi Square Co
- Pi Technologies PvtLtd
- Pi Telecom
- Pi Ventures
- PI Works
- PI Worldwide
- Pi-Coral
- Pi-Master
- Pi-Top
- PIAency
- piALGO Technologies
- Piano Software
- PIANOADV Srl
- PianoShelf
- Pianosoft
- PianoTalent
- Pianpian
- Pianta
- Piao
- Piaochong
- Piaojiaowang