Cognism is a B2B contact data platform that differentiates from ZoomInfo and Apollo primarily through two factors: stronger coverage and accuracy for European markets, and a phone-verified mobile number product called Diamond Data that provides human-verified direct dials rather than algorithmically sourced phone numbers. The platform serves both prospecting (searching for contacts by ICP criteria) and enrichment (adding contact data to existing CRM records), with integrations for Salesforce, HubSpot, Outreach, Salesloft, and other major sales tools.
Cognism holds a 4.6 out of 5 on G2 across more than 700 reviews. The company is headquartered in the UK and built its initial market position serving European sales teams, which is reflected in both its data depth for EMEA markets and in the concentration of its review base. It is the most commonly cited ZoomInfo alternative for teams with significant UK, DACH, and broader European outbound programs.
Pricing
Cognism does not publish pricing. Based on reported contract data, professional-tier contracts with a small team typically start at $15,000 to $20,000 per year. Mid-sized team deployments with higher export limits and Diamond Data access run $25,000 to $40,000 per year. Larger enterprise contracts with custom data packages exceed that range. All contracts are annual. Cognism's pricing has historically been positioned as competitive with ZoomInfo for EMEA-focused teams, and in negotiation Cognism typically emphasizes the data accuracy comparison for European contacts as justification for comparable pricing.
The Diamond Data add-on for phone-verified direct dials is an important pricing consideration. Access to human-verified mobiles adds cost beyond the base data package, and whether that cost is justified depends heavily on whether phone outreach is a meaningful part of the team's sales motion. Teams that rely primarily on email will not get the same value from Diamond Data as SDR teams that run a calling-first or calling-heavy outbound strategy.
What users report
- G2 reviewers describe Cognism's data accuracy for European contacts as meaningfully better than what they had experienced with ZoomInfo or Apollo for the same markets. Specific feedback covers GDPR-compliant data handling (Cognism screens against CTPS and other do-not-call registers for the UK, Germany, and other markets, which reduces compliance risk for European calling programs) and the reliability of UK mobile numbers via Diamond Data. Teams running UK and DACH outbound consistently describe higher connect rates with Cognism's phone-verified numbers than with algorithmically sourced numbers from competitors.
- The critical feedback focuses on coverage outside EMEA. Reviewers who need strong North American data alongside European coverage describe Cognism's US database as noticeably thinner than ZoomInfo's, particularly for enterprise accounts, mid-level titles, and direct dial accuracy. Teams with balanced US-Europe outbound programs find themselves either paying for both Cognism and ZoomInfo or accepting coverage gaps in one region. The waterfall enrichment approach through Clay (using Cognism as one of multiple data providers) offers a way to access Cognism's EMEA strength without paying for full platform access for the entire contact universe.
Cognism vs ZoomInfo vs Apollo
| Attribute | Cognism | ZoomInfo | Apollo |
|---|---|---|---|
| G2 Rating | 4.6 / 5 (700+ reviews) | 4.4 / 5 (8,000+ reviews) | 4.7 / 5 (9,400+ reviews) |
| Est. pricing | $15Kâ$40K/year | $15Kâ$50K+/year | $49â$119/user/month |
| EMEA data quality | Best in category | Weaker outside North America | Lags both for Europe |
| North America data | Thinner than ZoomInfo | Strongest | Strong; accuracy issues at scale |
| Phone-verified mobiles | Yes (Diamond Data add-on) | DirectDial product | Not specialized |
| GDPR compliance | Built-in screening (CTPS etc.) | Has faced EU scrutiny | Not EMEA-focused |
| Email sending | No | No (separate Engage module) | Yes (included) |
| Best for | UK, DACH, Benelux outbound | US enterprise data depth | All-in-one at low cost |
For EMEA-focused B2B sales teams, Cognism is generally the strongest choice on data accuracy for European contacts and GDPR compliance infrastructure. ZoomInfo has stronger North American enterprise data and broader platform features but is weaker on EMEA coverage. Apollo is significantly cheaper than either and sufficient for teams that prioritize volume over precision, but its data quality for European contacts lags both Cognism and ZoomInfo. Teams with exclusively US or North American outbound targets have less reason to consider Cognism over ZoomInfo at comparable price points. Teams with significant EMEA pipeline or a calling-heavy SDR motion with UK or DACH targets have the strongest case for Cognism as their primary data provider.
Who Cognism fits
- Cognism fits B2B sales teams with meaningful outbound programs in the UK, DACH, Benelux, or broader European markets where data accuracy and GDPR compliance matter for legal and operational reasons. The platform is particularly strong for teams running phone-first outbound in the UK, where verified mobile numbers directly affect connect rates and calling program economics. At $15,000 to $40,000 per year depending on team size and Diamond Data access, Cognism is a premium data purchase that is justified by data accuracy improvements for teams targeting markets where it has clear advantages, and harder to justify for teams with predominantly North American outbound programs where ZoomInfo or even Apollo provide comparable coverage at similar or lower cost.