Cognism review

The leader in GDPR-compliant European data, with excellent human-verified mobile numbers for direct outreach.

Verdict

Cognism stands out for its focus on data quality and compliance, particularly within the EMEA market. Its proprietary 'Diamond Data' provides human-verified mobile numbers, making it the top choice for teams where direct phone outreach is critical and GDPR adherence is non-negotiable.

What customers praise

Cognism's strict GDPR compliance, including checking against do-not-call lists, gives sales leaders peace of mind when running campaigns in Europe.

What customers criticise

Its database is smaller than ZoomInfo's or Apollo's, and its strength in North America, while growing, is still secondary to its European focus.

Best for

Sales teams prospecting in Europe who need high-quality, GDPR-compliant mobile numbers and contact data.

At a glance

• Integrations: Salesforce, HubSpot, Outreach, Salesloft, Microsoft Dynamics 365
• Compliance: GDPR, CCPA, PECR
• Regions served: Europe, North America, APAC
• Typical onboarding: 7 days

Red flags

Public risk signals as of June 2026: none. No material public risk signals as of 2026-06-18. See the full red-flag report.

Alternatives

See alternatives to Cognism, or compare against the next-ranked entry: Cognism vs Lusha.

Where else this brand ranks

• The 11 Best Sales Intelligence Platforms — #5
• The 11 Best B2B Data Providers & Contact Databases — #3

Source: Top 11 The 11 Best B2B Data Providers & Contact Databases, verified June 18, 2026 — no paid placement.