Companies beginning with W:
W5 (Ireland)
W5 (USA)
Wakoopa
Walnut Unlimited
Walr
Wardle McLean
Watch Me Think
Watermelon Research
Waveform Insight Studio
Wavemaker
Wavemetrix
We Are Futures / The National Schools Partnership
Wealth-X - part of Altrata
Webcall Research
Webcertain Group - acquired by TransPerfect
WebFindYou
Webhaptic Intelligence Limited
webQDA
WebTrends Inc
Weeks Computing Services
weseethrough
Westat, Inc.
WEVO
What's Your View
Wheroware
Whip Media Group
Whistle
White Tiger Research
Why? Research
Whycatcher
WideOrbit
Wipro
WIRe
Wirral Sensory Services
Wiser
WJSchroer Co.
Wonder
Wondrlab
Wood Mackenzie
Wooldridge Associates
Wootric - acquired by InMoment 2021
WorkHound
worldly.io - formerly known as Higg
WPP's Essence
WTW (Willis Towers Watson)