ZoomInfo vs Seamless.AI
Which sales engagement tool is right for you? Compare features, pricing, and user reviews to make the best choice.
ZoomInfo
Mid-market and enterprise teams that need deep US company data, intent signals and a full GTM platform, and can sign an annual contract.
Seamless.AI
Sales teams that want a large contact database plus built-in emailing and dialing, and are fine negotiating a custom quote.
Side by side
| ZoomInfo | Seamless.AI | |
|---|---|---|
| Pricing | Custom quote only, billed annually; free ZoomInfo Lite plan with 10 credits a month | Free plan with 50 credits; paid plans are quote only (no public prices) |
| G2 Rating | Not yet verified | Not yet verified |
| Best For | Mid-market and enterprise teams that need deep US company data, intent signals and a full GTM platform, and can sign an annual contract. | Sales teams that want a large contact database plus built-in emailing and dialing, and are fine negotiating a custom quote. |
Pros and cons
ZoomInfo
Pros
- One of the largest B2B databases (500M+ contacts, vendor claim)
- Intent, website visitor and job change signals
- Wide integrations plus conversation intelligence (Chorus) in the same vendor
- Strong compliance certifications listed (ISO 27001, ISO 27701, SOC 2 Type II)
Cons
- No public pricing; annual contracts only
- Seat minimums and credit purchases add up
- Free plan is very small (10 credits a month)
- Product names keep changing (Copilot, GTM Workspace), which makes packages harder to compare
Seamless.AI
Pros
- Free plan to test the data before talking to sales
- Automatic credit refunds for invalid emails
- Free Chrome extension that works on LinkedIn and any website
- Data, emailing, dialing and AI list building in one platform
- States GDPR, CCPA and SOC 2 Type II compliance
Cons
- No public pricing for any paid plan
- Free plan is only 50 credits
- Vendor's database size claims differ between its own pages (1.6B+ vs 2.2B+)
- Credit costs per lookup are not published
Related comparisons
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Lusha is the easiest self-serve swap for small teams: a free plan, public prices and phone numbers at 5 credits instead of Apollo's 8. Pick Cognism for European calling, Hunter if you only need emails, Clay for custom enrichment, or lemlist if you mainly want better sequences. Larger teams that need more data and intent should look at ZoomInfo.
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Apollo.io is the best sales prospecting tool for most teams: a real free plan, public pricing from $49/seat/month billed annually, and contact data, sequences and a dialer in one tool. Pick ZoomInfo for enterprise data and intent, Cognism for Europe and verified mobiles, Lusha for a quick self-serve extension, or Clay for custom enrichment workflows.
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Apollo.io is the best ZoomInfo alternative for most teams: public prices from $49 per seat per month billed annually, a free plan, and data plus outreach in one tool. Pick Cognism for Europe and cold calling, Lusha or RocketReach for cheap self-serve lookups, or Clay for custom enrichment.
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