Cognism vs Sierra AI
A side-by-side look at scores, pricing and features — with RECATOOLS' ASEAN-aware verdict for each.
Cognism
Phone-verified B2B mobile data, strongest in EMEA
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Sierra AI
Branded AI agents for customer experience
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| RECATOOLS Score | 6.8 / 10 | 7.2 / 10 |
| Capability | ||
| Value for money | ||
| Ease of use | ||
| ASEAN readiness | ||
| API quality | ||
| Pricing | Paid | Enterprise |
| Free tier | — | — |
| Paid from | — | — |
| Has API | ✗ | ✓ |
| Open source | ✗ | ✗ |
| Free to use | ✗ | ✗ |
| Users | — | More than 40% of the Fortune 50 as customers; company reported more than $150M ARR as of early 2026 |
| Founded | — | 2023 |
| Maker | — | — |
| Verdict | Cognism's reputation rests on one thing done well: mobile phone accuracy. Its "Diamond Data" numbers are human-verified, operators literally call to confirm, and users report connect rates two to three times higher than... |
Sierra builds bespoke, action-taking AI agents for enterprise customer service — resolving issues, processing cancellations, handling upsells — with deep systems integration and strong guardrails. The May 2026 raise ($95... |
| Full review → | Full review → |
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Comparisons cover up to 4 tools. Scores are RECATOOLS editorial assessments; verify current pricing on each vendor's site.