Best B2B Contact Data Providers (2026)

B2B data providers compared by database size, accuracy & pricing. Side-by-side reviews of Apollo, ZoomInfo, Lusha & more with verified data quality scores.

Cognism logo

Cognism

4.6 rating · 740 reviews

Premium B2B sales intelligence platform with phone-verified Diamond Data®, buyer intent signals, and GDPR-compliant contact enrichment.

EmailGuard logo

EmailGuard

4.2 rating · 8 reviews

All-in-one email deliverability platform with authentication monitoring, blacklist tracking, inbox testing, and domain masking for cold outreach teams.