Comparison · Independent · Updated June 2026
Cognism vs Seamless.ai
In short
Cognism edges it overall at 8.1/10 to Seamless.ai's 6.3/10. Cognism leads on compliance
Scorecard, side by side
| Our rubric | Cognism | Seamless.ai |
|---|---|---|
| Overall score | 8.1 | 6.3 |
| Data accuracy | 8.5 | 5.5 |
| Coverage | 7.5 | 7.0 |
| Ease of use | 9.4 | 8.9 |
| Pricing & transparency | 5.5 | 5.0 |
| Compliance | 9.0 | 4.5 |
Scores come from the same rubric applied to every provider. Higher value in each row is highlighted.
Third-party ratings
| Public rating | Cognism | Seamless.ai |
|---|---|---|
| G2 | 4.5/5 (1,333) | 4.4/5 (5,341) |
| Capterra | 4.7/5 (257) | 4.5/5 (547) |
Pricing & data, side by side
| Attribute | Cognism | Seamless.ai |
|---|---|---|
| Entry price | ~£12,000/yr | ~$1,764/yr |
| Pricing transparency | Demo-gated | Demo-gated |
| Free plan | No | Yes |
| Free trial | Yes | Yes |
| Verified email | ✓ | ✓ |
| Mobile / direct dials | ✓ | ✓ |
| Intent data | ✓ | ✓ |
| Website visitor ID | – | – |
| CRM enrichment | – | ✓ |
Feature by feature
A union of both vendors' documented features. A dash means the vendor doesn't list that attribute, not necessarily that it's missing.
| Feature | Cognism | Seamless.ai |
|---|---|---|
| Verified work email | yes | yes |
| Mobile numbers | Phone-verified (Diamond) | Yes (credit-based) |
| Intent data | Add-on (Bombora) | Add-on |
| Website visitor ID | no | no |
| CRM enrichment | yes | Add-on |
| Chrome extension | yes | yes |
| CRM & sales integrations | Salesforce, HubSpot, Outreach, SalesLoft | no |
| Free plan | no | Yes (50 credits) |
| Free trial | Limited sample (~25 leads) | no |
| Contract | Annual only | Annual; 60-day cancellation window |
| GDPR / compliance | Compliance-first; notified-jurisdiction checks | Weak (real-time crawl; no TPS/CTPS) |
| UK & EMEA coverage | Excellent | Weak |
| US coverage | Moderate | Strong (high volume) |
| Accuracy | no | No published %; users report 20–30% bounce |
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Cognism
Pros
- Phone-verified "Diamond" mobiles deliver markedly higher connect rates than most rivals.
- Compliance-first, with GDPR treated as an engineering concern and notified-jurisdiction screening across 15+ countries.
- Strongest UK & EMEA coverage in the category; reps can build usable lists on day one.
- Ease of use is the most-praised aspect across G2 (4.5/5) and Capterra (4.7/5) reviews.
Cons
- Pricing is sales-led and opaque, with annual-only contracts, prohibitive for small teams.
- US, Canada and APAC coverage is weaker than its UK/EMEA core.
- Diamond verification covers only a subset of records; "accuracy" claims apply to that subset, not the whole database.
- A US right-of-publicity class action (Kis v. Cognism) settled in 2025 over contact data shown to free-trial users; Cognism denied wrongdoing.
Seamless.ai
Pros
- Massive claimed database (billions of contacts) and a genuinely free starter tier.
- Real-time search finds contacts on demand rather than from a stale stored list.
- Ease of use is well-rated (G2 4.4/5 from 5,000+ reviews and Capterra Ease of Use 4.5/5).
- Strong US coverage for high-volume prospecting.
Cons
- Data accuracy is the dominant complaint; users report 20–30% bounce rates, well below marketing claims.
- Paid pricing is demo-gated and credit-based, with intent and enrichment sold as add-ons.
- Auto-renewal and a 60-day cancellation window are a recurring billing complaint (per BBB filings).
- International (UK/EU) coverage and accuracy are weak, with no TPS/CTPS screening.
Frequently asked questions
- Is Cognism or Seamless.ai better?
- Cognism edges it overall at 8.1/10 to Seamless.ai's 6.3/10. Cognism leads on compliance
- Which is cheaper, Cognism or Seamless.ai?
- On entry pricing, Seamless.ai is the cheaper way in (~$1,764/yr vs ~£12,000/yr). Credit models differ, so compare what you actually pay per 1,000 contacts, not just the headline.
- Can I use Cognism and Seamless.ai together?
- Yes, teams often pair a broad database with a specialist tool. Just avoid paying twice for the same coverage; check where Cognism and Seamless.ai overlap before buying both.