Companies beginning with Z:
Z. Research Services - site not found Sept '26
Zagabria Medical - diverts to Alitools.io as of Sept 26
Zappi
Zartico
Zealot - brand now disappeared into UserEvidence
Zeenk - apparently closed from '25 onwards
Zeldis Research Associates
ZenDesk
ZeoTap
Zepto Atom
Zeta Global Corp.
Zing Data - site not found Sept '26
Zinklar
Zintro - now part of Focus Crossroads
Zitcha
ZoomInfo
ZS
Zuora (and sub-brand Zephr)