Cognism vs Seamless.AI
Side-by-side from the Top 11 rankings of The 11 Best B2B Data Providers & Contact Databases (2026) and The 11 Best Lead Generation Tools (2026). Last verified June 18, 2026.
The short answer
Cognism ranks higher on Top 11 (#3 vs #5) for Sales teams sourcing verified B2B contact lists and intent data / Sales and marketing teams building top-of-funnel pipelines. The leader in GDPR-compliant European data, with excellent human-verified mobile numbers for direct outreach.
At a glance
| Cognism | Seamless.AI | |
|---|---|---|
| Top 11 rank | #3 / The 11 Best B2B Data Providers & Contact Databases (2026) | #5 / The 11 Best Lead Generation Tools (2026) |
| Score (out of 9.4) | 8.8 | 8.4 |
| Best for | Best for EU data & compliance | Unlimited contact credits |
| Pricing | $$$ (Custom quotes, from $10k/yr) | $$$ ($149 to $250/user/mo) |
| HQ | London, UK | Columbus, OH, USA |
| Founded | 2015 | 2018 |
Cognism
The leader in GDPR-compliant European data, with excellent human-verified mobile numbers for direct outreach.
www.cognism.comSee full entry in The 11 Best B2B Data Providers & Contact Databases (2026)
Methodology and scoring weights live at /methodology. No vendor pays for placement — see about.