Comparison · Independent · Updated June 2026
Seamless.ai vs ZoomInfo
In short
ZoomInfo edges it overall at 7.3/10 to Seamless.ai's 6.3/10. Seamless.ai leads on pricing & transparency, while ZoomInfo leads on data accuracy.
Scorecard, side by side
| Our rubric | Seamless.ai | ZoomInfo |
|---|---|---|
| Overall score | 6.3 | 7.3 |
| Data accuracy | 5.5 | 8.0 |
| Coverage | 7.0 | 8.5 |
| Ease of use | 8.9 | 8.7 |
| Pricing & transparency | 5.0 | 4.0 |
| Compliance | 4.5 | 5.5 |
Scores come from the same rubric applied to every provider. Higher value in each row is highlighted.
Third-party ratings
| Public rating | Seamless.ai | ZoomInfo |
|---|---|---|
| G2 | 4.4/5 (5,341) | 4.5/5 (9,102) |
| Capterra | 4.5/5 (547) | 4.1/5 (319) |
Pricing & data, side by side
| Attribute | Seamless.ai | ZoomInfo |
|---|---|---|
| Entry price | ~$1,764/yr | ~$14,995/yr |
| Pricing transparency | Demo-gated | Demo-gated |
| Free plan | Yes | No |
| Free trial | Yes | No |
| 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 | Seamless.ai | ZoomInfo |
|---|---|---|
| Verified work email | yes | yes |
| Mobile / direct dials | Yes (credit-based) | Yes (~135M numbers claimed) |
| Intent data | Add-on | Yes, proprietary streaming intent |
| Website visitor ID | no | Yes (WebSights) |
| Data enrichment | Add-on | yes |
| Chrome extension | yes | no |
| Free plan | Yes (50 credits) | no |
| Contract | Annual; 60-day cancellation window | Annual; multi-year common, auto-renews |
| GDPR / compliance | Weak (real-time crawl; no TPS/CTPS) | GDPR/CCPA stated; right-of-publicity suits |
| US coverage | Strong (high volume) | Excellent (deepest in category) |
| UK coverage | Weak | Moderate (paid Data Passport add-on) |
| Accuracy | No published %; users report 20–30% bounce | no |
| Technographic data | no | yes |
| Firmographics | no | Deep: org charts, scoops, news signals |
| Public company | no | Nasdaq: GTM (formerly ZI) |
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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.
ZoomInfo
Pros
- The deepest US database in the category, with 500M+ profiles claimed, org charts, scoops and news signals.
- A genuinely all-in-one platform, bundling intent data, website visitor ID (WebSights), enrichment and technographics together.
- Precise, powerful search and filtering that experienced teams rate highly (G2 4.5/5 from 9,000+ reviews).
- Strong CRM and workflow integrations.
Cons
- Opaque, five-figure pricing, with Vendr data putting the median deal near $33,500/yr and all-in costs commonly $30k–$60k.
- Rigid multi-year contracts and 60-day auto-renewal terms are the most common complaint, with state-AG complaints on record.
- Data accuracy decays outside the US and for older records; international coverage is a paid add-on.
- Two US right-of-publicity cases ($29.55M Ramos settlement; Martinez allowed to proceed) reflect ongoing data-subject backlash over being listed.
Frequently asked questions
- Is Seamless.ai or ZoomInfo better?
- ZoomInfo edges it overall at 7.3/10 to Seamless.ai's 6.3/10. Seamless.ai leads on pricing & transparency, while ZoomInfo leads on data accuracy.
- Which is cheaper, Seamless.ai or ZoomInfo?
- On entry pricing, Seamless.ai is the cheaper way in (~$1,764/yr vs ~$14,995/yr). Credit models differ, so compare what you actually pay per 1,000 contacts, not just the headline.
- Can I use Seamless.ai and ZoomInfo together?
- Yes, teams often pair a broad database with a specialist tool. Just avoid paying twice for the same coverage; check where Seamless.ai and ZoomInfo overlap before buying both.