Side by side
Seamless.AI vs ZoomInfo
Both stand on b2b contact data providers. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan APIExtensionWeb
Visit Seamless.AI Free plan APIExtensionWeb
Choose ZoomInfo if your team needs B2B contact and company data together with sales, marketing, or account-based workflows. Its permanent free plan offers a way to start, while paid plan pricing requires a request and the trial is usage-limited.
Visit ZoomInfoThe facts
| Seamless.AI | ZoomInfo | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Not published |
| Runs on | API, Extension, Web | API, Extension, Web |
| Lowest paid plan | Free or on request | Free or on request |
| Plans published | 3 | 7 |
| Maker | Not published | ZoomInfo |
| Website | seamless.ai | zoominfo.com |
| On b2b contact data providers | #4 of 77 | #1 of 77 |
Seamless.AI: what it does well
ZoomInfo: what it does well
- Data coverage includes 500M+ contacts and 100M+ companies.
- Supports prospecting, intent, account insights, routing, and CRM enrichment.
- Native integrations with Salesforce, HubSpot, and Microsoft Dynamics 365.
- MCP server connects Claude, ChatGPT, and custom agents to its data.
- Permanent free plan and a no-credit-card trial are available.
What to know first
- Paid plan pricing is available on request.
- The trial typically lasts 7 days and has usage limits.
- Features and credits vary across the listed plans.
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