Companies

O-Web Technologies
O2 Games
O2 Secure Wireless
O3b Networks
Oak Pacific Interactive
Oakland Single Parents' Network
Oakmonkey
OANDA
Oasmia Pharmaceutical
Oasys Design Systems
Oasys Mobile
Oasys Water
Oasyssoft
Oatmeal
OATSystems
OB10
Obalon Therapeutics
oBaz
Oberon Media
Oberon Space
OberScharrer
Object Matrix
Objective Logistics
ObjectLabs
ObjectVideo
ObjectWay
Objectworld Communications
Oblong Industries
OBOOK
obopay
Obsorb
Obvious
Obviousidea
Ocapi
Ocarina Networks
Ocarina Technologies
Occipital
Occlutech
Ocean Outdoor
Ocean Power Technologies
Ocean Renewable Power Company
Oceanlinx
Oceans Healthcare
Oceen
Ocelus
OchreSoft Technologies
Ocimum Biosolutions
Ocision
Oclaro
Oco
Octavian
Octopart
Octopusapp
octoScope
Octoshape
OctreoPharm Sciences
Ocular Therapeutix
Oculis Labs
OCZ Technology
Oddcast
Oddsfutures.com
ODEGARD Media Group
Odeo
oDesk
Odimax
OdinOtvet
Odnoklassniki
Odojo
Odotech
Odysii
Odyssey Thera
Oesia
Ofelia Feliz
Ofercity
OFERTALDIA
Off & Away
Off Track Planet
Off-Grid Solutions
Offbeat Guides
Offees
OfferIQ
OfferLounge
Offermatic
Offermatica
Offermobi
Offerpop
Offers.com
Offerti
Offerum
OfferWire
OfficeDrop
OfficeMetrics
Official Limited Virtual
official.fm
OfficialVirtualDJ
Offline Labs
Ofidium
Ofuz
OggiFinogi
Ogmento
Ogorod
OGPlanet
Oh My Green
Ohai
Ohanae
OHK Labs
Ohm Universe
OhMyGov Inc.
Ojos
Okairos
OkBuy.com
OkCupid
Okeyko
OKKAM
Okta
Oktagon
Oktagon Games
OktagonGames
Oktalogic
Oktogo.ru
Olacabs
Olah-Viq Software Solutions
Olapic
Olark
Olaworks
Oldelft Ultrasound
Olea Medical
OLED-T
OleOle
Olery
Oligomerix
Olista
Olive Software
OliveSoftware
OLO
Olocity
Ology Media
olook
OLX
oLyfe
OM Latam
Omada Health
Omaze
OMEGA MORGAN
Omek Interactive
omelett.es
Omeros
Omgili
OMGPOP
Ommven
Omni Helicopters International
Omni Water Solutions
Omni-ID
Omnicademy
Omnicity
Omnidrive
OmniGuide
Omnikles
Omnilink Systems
Omnisens
Omnisio
OmniStrat
Omnitrol Networks
Omniture
OmPrompt
Omrix Biopharmaceuticals
Omthera Pharmaceuticals
On Deck
ON DEMAND Microelectronics
On Demand Therapeutics
On Networks
On The Net Yet
On The Run Tech
On The Spot Systems
On-Q-ity
On-Ramp Wireless
On2 Technologies
ON24
OnAir3G
OnApp
Onaro
OnAsset Intelligence
Onavo
oncgnostics
OnChip Power
Oncodesign
Oncofactor Corporation
OncoHealth
Oncolytics Biotech
OncoMed Pharmaceuticals
Onconova Therapeutics
OncoPep
OnCorp Direct
Oncos Therapeutics
Oncothyreon
OncoTree DTS
OncoVista Innovative Therapies
Ondango

Ondax
Ondeego
Ondore
One
One Block Off the Grid (1BOG)
One Inc.
One Jackson
One Jackson Clothing
One Kings Lane
One Medical Group
One On One Ads
One on One Marketing
One Season
One Step Solutions
One True Media
One-Song
One4All
One97 Communications
OneAssist Consumer Solutions
OneAway
OneBuckResume
OneChip Photonics
OneCubicle
oneDrum
Onefeat
onefinestay
oneforty
OneHealth Solutions
Onehub
OneID
OneLogin
OneMedNet
OneNeck IT Services
OnePageCRM
Onepager
OnePIN
OneRiot
OneRoof
OneRoof Energy
OneRoomRate.com
OneSchool
OneSource Virtual
OneSpin Solutions
OneSpot
OneStop Internet
OneTouch
OneTrueFan
OneTwoTrip
OneWire
ONFocus Healthcare
OnForce
Onformonics
Ongo
OnGreen
Onit
Online Warmongers
Onlineprinters
OnLive
Only Mallorca
ONOSYS
ONOSYS Online Ordering
OnPath Technologies
OnRequest Images
Onset Technology
OnShift
OnState
ONStor
Onstream Media
OnSwipe
Ontela
ONtheAIR
OnTheRoad
Ontuitive
OnVantage
Onyvax
Onyx Group
Onzo
Oobafit
Oodle
Oodrive
oohilove
ooma
Oonair
ooomf
Ooploo
Oorja Protonics
Ooyala
op5
OPAL Therapeutics
Opalis Software
Opality
Opanga Networks
Opara
Oparla
Opax
OpDemand
OPEL Technologies
Open Air Publishing
Open Box Technologies
Open CS
Open Dynamics
Open Energi
Open English
Open Garden
Open Kernel Labs
Open Labs
Open Mile
Open Network Entertainment
Open Places
Open Road Integrated Media
Open Silicon
Open Source Food
OPEN Sports Network
Open-Plug
Open-Xchange
OpenAir
OpenBook
Openbravo
Openbucks
OpenBuildings
OpenCandy
OpenChime
OpenCloud
OpenClovis
OpenCoin
Opendisc
OpenDNS
OpenDrive
Openera
Openet
OpenExchange
OpenFeint
OpenFin
Openfinance
OpenGamma
OpenGeo
OpenHatch
OpenLabel
OPENLANE
OpenLogic
Openovate Labs
OpenPeak
openPeople
OpenPlacement
OpenPortal
OpenQ
OpenRoad Integrated Media
OpenSearchServer
OpenSesame
OpenSky
OpenSpace
OpenSpan
OpenSpirit
OpenStudy
OpenSynergy
OpenTable
OpenTrust
OpenX
OpenZine
Opera Solutions
Operative Media
Operative Mind
Operax
OpGen
Ophthotech
Opicos
OpinewsTV
OpinionLab
opinions.h
Oportunista
Opower
Oppa
Opposing Views
Opscode
Opsona
OpSource
Opsware
Opta Sportsdata
Optaros
Optasite
Optichron
Optics 1
OpTier
Optify
Optima Diagnostics
Optimal
Optimal Blue
Optimal Technologies
OptimalTest
Optimata
OptiMedica
OptiMine Software
Optimizely
Optimum Energy
Optimum Interactive USA
Optimus
Optimus3
Optini

OptiNose
Optinuity
OptionEase
OptionsCity Software
Optisense
OptiSolar R&D
OptiSynx
Optiway Ltd.
OptixConnect
OptoNova
Optony
Optoro
Optosecurity
Optovue
OpTrip
OpVista
OPX Biotechnologies
Opzi
OQO
OQVestir
OR Productivity
OraBrush
OraMetrix
Orange Line Media
Orange Money /dba EZBOB
OrangeHRM
OrangeScape
OrangeSlyce
OrangeSoda
Orasi Medical, Inc.
Oravel
Oraya Therapeutics
Orb Networks
Orbel Health
Orbeus
Orbis Education
Orbit Media
Orbotix
Orbster
Orca Digital
ORCA, Inc.
Orchestra Networks
Orchestria Corporation
Order Mapper
OrderAhead
orderbird AG
Orderbolt
OrderBorder
OrderGroove
OrderMotion
OrderStorm
orderTalk
orderTopia
OrderWithMe
ORDISSIMO
Ordoro
Ordr.in
Orecon
Oree Advanced Illumination Solutions
Orega Biotech
Organic Avenue
Organic Church Today
Organic Motion
Organic To Go
OrganizedWisdom
Orgger
Orgoo
Oriel Therapeutics
Orient Green Power
Oriental-Creations
Origami Labs
Origami Logic
Origen Therapeutics
Origene Technologies
Origin Digital
Origin Healthcare Solutions
OriginGPS
OrionVM Cloud Platform
Ornim Medical
OROS
Orphazyme
OrSense
Orsus Solutions USA
Orteq
OrthAlign
Ortho Kinematics
OrthoAccel Technologies
Orthocon
Orthocone
OrthoData
Orthogem
Orthos
OrthoSensor
Ortiva Wireless
Orugga
Oryzon Genomics
OSA Technologies
OSG Records Management
OSIsoft
Oslo Software
OSOYOU.com
Osprey Pharmaceuticals USA
Osseon Therapeutics
OSSIANIX
Ostara
Ostrovok
Osurv
OTC PR Group
OtherInbox
OtherLevels
OTI Greentech
Otonomy
Otozip
Ounce Labs
Ourcast
OurShelf
OurStage
OurStory
OurVinyl
OutboundEngine
Outbrain
OuterBay Technologies
Outitude
Outline
Outline App
Outplay Entertainment
Outrigger Media
Outright
Outside.in
Outsmart
OutSmart Power Systems
Outspark
OutSystems
OUYA
Ovalis
OvaScience
Ovelin
Overblog
Overinteractive Media
Overland Storage
Overlay.tv
OverNear
Oversee
Oversi
Oversight Systems
Overtime Media
Overtone
Overture Networks
Overture Technologies
OVGuide
Ovuline
Owensboro Grain
Owlient
Owlin
Owlparrot
Own Point of Sale
ownCloud
Owned it
OwnEnergy
OwnerIQ
OwnerListens
OwnLocal
OwnZones Media
Oxagen
Oxane Materials
Oxatis
Oxford Immunotec
Oxford Nanopore Technologies
Oxford Networks
Oxford Performance Materials
Oxford Photovoltaics
Oxford Semiconductor
OxiCool
Oxitec
Oxlo Systems
Oxonica
Oxsensis
Oxtex
OxThera
Oxtox
Oxynade
Oxyntix
Oxyrane UK
OY LX Therapies
OyaGen
OYCO Systems
Oyster
Oyster.com
OZ Communications
Ozmo Devices
Ozmota
OZON.ru
Ozone Media Solutions
Ozsale
Ozura World
OzVision
OZZ Electric

Category	Advertising BioTech CleanTech Consumer Electronics/Devices Consumer Web eCommerce Education Enterprise Games, Video and Entertainment Legal Mobile/Wireless Network/Hosting Consulting Communications Search Security Semiconductor Software Other
Status	Privately Held Publicly Held Acquired Deadpooled
Funding	Bootstrapped Funded Investor

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