In 2006, OSiM participants included:
- A La Mobile
- Access
- Alten Espana
- ARCchart
- ARM
- ATI Technologies
- Black Duck Software
- Boingo Wireless
- BT
- BT Global Services
- Capgemini
- Celunite
- Collabora
- Comneon
- Coolsand Technologies
- Coss
- Eclipse Foundation
- Elcoteq Design Center
- Electronics and Telecommunications Research Institute
- Elektrobit
- Ericsson
- Esmertec
- FIL
- France Telecom R&D Beijing
- Funambol
- Global Locate
- Groupe Ormes
- Infineon
- Intel
- Jaluna
- LG Electronics
- LiPS Forum
- Marvell Semiconductor
- MontaVista
- Motorola
- Navica
- Neuf Cegetel
- Nokia
- Nokia Mobile Software Platforms
- NXP Software
- Open Mobile Alliance
- Open Plug
- OpenLogic
- Orange
- OSDL
- Ovum
- PacketVideo
- PalmSource
- Panasonic Mobile Communications
- Philips Semiconductors
- Purple Labs
- Raymond James & Assoc
- Rosenlaw & Einschlag
- Samsung
- Samsung Electronics Research Institute
- Saunalahti Group Qyj
- Silicon Laboratories France
- Sony Ericsson
- Sourcelabs
- ST Microelectronics
- Sun Microsystems
- Symantec Corp.
- Symbian
- Telecom Italia
- Telecom Italia Laboratories
- Texas Instruments
- T-Mobile International
- Trolltech
- Tycho Technologies
- Vodafone
- Vodafone Group Services
- Wind River Systems
