ZoomInfo vs Cognism

The short version

ZoomInfo and Cognism are the two vendors most often shortlisted by mid-market and enterprise sales teams that need phone numbers, not just emails. The difference is geography and compliance posture. ZoomInfo's database is deepest in the United States [1][2]. Cognism built its business in the UK and Europe, markets phone-verified mobile numbers under the Diamond Data label, and screens records against do-not-call registries in multiple countries [3][5][6]. Neither publishes list prices; both sell annual contracts.

The rule of thumb that holds up in G2 reviews: if more than half your pipeline is in North America, ZoomInfo usually wins the coverage test. If more than half is in EMEA, Cognism usually wins it. If you are split, test both on your own list using the method in our evaluation guide, because blended coverage numbers hide exactly the segment you care about [2][4].

ZoomInfo vs Cognism at a glance

Coverage: it is a geography question

Cognism's origin is the UK, and its G2 review base skews toward European sales teams who cite mobile-number accuracy in the UK, Germany, France and the Nordics as the reason they chose it over ZoomInfo [4]. ZoomInfo's review base skews American, and those reviewers cite the same thing in reverse: US direct dials that connect [2].

This is not marketing positioning; it shows up in coverage tests. A US-heavy target list run through Cognism typically returns fewer mobiles than ZoomInfo. An EMEA-heavy list run through ZoomInfo typically returns more emails than mobiles, and a portion of the mobiles are switchboard numbers. If your list is genuinely global, neither wins outright, and the honest answer is a split by region or a waterfall tool such as Clay that queries both.

The Diamond Data claim

Cognism's Diamond Data label applies to mobile numbers it says have been phone-verified by its team [5]. That is a stronger claim than most databases make, and it is checkable: request a trial, pull 40 Diamond-flagged numbers for your own target accounts, and have an SDR dial them. Score reached-the-person versus wrong-number. Do the same for 40 ZoomInfo direct dials. The result on your list beats any vendor claim, including this one.

Compliance: Cognism made it the product

Cognism's compliance page describes screening records against do-not-call registries in the UK, Germany, France, and several other European markets, plus GDPR notification practices for the individuals in its database [6]. For teams selling into Europe, that removes a real legal-review burden. ZoomInfo maintains a GDPR and CCPA compliance program and offers DNC handling, but reviewers describe it as something you configure rather than a differentiator [10][2].

The practical implication for a US-only team is close to zero. For a European team, it can be the deciding factor, and it is one of the reasons Cognism and its SMB brand Kaspr dominate our EMEA recommendations [7].

Pricing and contract model

Neither vendor publishes prices. ZoomInfo's pricing page describes Professional, Advanced and Elite tiers and directs buyers to sales [1]. Cognism's pricing page describes packages, emphasizes unrestricted viewing of records on paid plans, and also directs buyers to sales [3].

The structural difference is credits. ZoomInfo's model is seats plus a credit pool, with exports drawing down credits; running out mid-year means an overage purchase [1]. Cognism markets unrestricted views, meaning reps can look up as many records as they want; export limits still exist and vary by package [3]. For high-activity SDR teams that hit ZoomInfo credit ceilings, this is a concrete reason to price Cognism. Confirm the export definition in writing before signing, per the contract checklist in our buyer's guide.

Both vendors sell annual contracts with auto-renewal terms [10]. ZoomInfo's tier structure is broken down further on our ZoomInfo pricing page.

Features beyond the database

ZoomInfo has the broader platform. Copilot adds AI account summaries, buying-signal alerts and email drafting [8]; Websights identifies website visitors; Engage adds sequencing; and separate Marketing, Talent and Operations products extend into other departments [1]. Cognism is narrower by design: it sells data, a browser extension, CRM and sales-engagement integrations, and intent through a Bombora partnership on higher packages [3]. Reviewers who want a single vendor for everything lean ZoomInfo; reviewers who want the best phone data for Europe and already have a sequencing tool lean Cognism [2][4].

Both integrate with Salesforce, HubSpot, Outreach and Salesloft. Cognism's Chrome extension works inside LinkedIn Sales Navigator, which matters for teams whose prospecting starts there.

Who should pick which

Pick ZoomInfo if

• Most of your revenue is in North America and reps depend on direct dials.
• You want org charts, technographics, intent and AI in one contract.
• You have the budget for an enterprise tier and the discipline to manage credits.

Pick Cognism if

• Most of your revenue is in the UK or Europe and mobile connect rate is your bottleneck.
• Legal review of DNC and GDPR handling is slowing your outbound program.
• Your SDRs keep hitting ZoomInfo credit limits and you want unrestricted viewing.

Consider something else if

• You are under about 15 reps: both are priced for larger teams. Kaspr, Apollo and Lusha cover SMB better; see alternatives for SMB.
• Your outbound is email-only: you are paying for phone verification you will not use. See ZoomInfo vs Apollo.

Frequently asked questions