Companies beginning with H:
H.I.G. Capital
H2 Creative Digital
H2 Partners
Habit5
Habu / Reveal Mobile - latter a location data specialist, rebranded and merged into Liveramp
Hahn Public
Hall & Partners
Hallett Arendt
Hansa Research Group
Happy Thinking People - acquired by Human8
Harmonya
Harris Poll
HarrisX
Harte-Hanks
Haus
Havas CSA (logo not showing)
Healthcare Research Worldwide
Heap Analytics - joined forces with Contentsquare (no logo showing)
Heart+Mind Strategies
Hearts & Science
Heatmap
Heawood Research
Helixa
Hellebusch Research & Consulting, Inc. (logo not showing, site not found 14/05)
Hellman & Friedman - investor, acquired Zendesk
Hello Ara
Hello Customer
HELM Digital (site not found 14/05)
Herspiegel (now part of Acumetis Global)
Hex (duplicate - use this version)
Hex Technologies (duplicate - see above)
Hexa Research
HFS
HG Insights
Hi-Tech BPO
High Beam Global
Hightouch
HireRoad
Hispanic Research Inc.
Hivestack - research division is now part of Perion brand
HMR
Holden Healthcare
Hookit (now part of KORE - owned and operated by Two Circles)
Hootology
Hope + Anchor
Horizon
Hotspex Inc
house51 Strategic Research - site not found 14/26
HowLikely - site 'under maintenance' 4/25
HR Acuity
HubSpot
Human8
Humanising Autonomy (website not found 14/26)
Humankind (acquired by Tulip Dec 2024)
Humu (acquired by Perceptyx Aug 2023)
Huq industries
Huron
HyperArc - part of ZenDesk since July '25
Hypetap
Hyphametrics