Companies beginning with J:
J.D. Power
James Law Research Associates Ltd
Japan Direct Research Limited
Jasper Colin Research
Javelin Strategy & Research
Jaywing
Jebbit - now BlueConic
Jibunu - part of OpinionRoute since '26
Jon Peddie Research (JPR)
JTN Research
Judo - web site won't load Sept '26
Julius
Jump Research
Jungle Green