The practical difference.
Sources checked 2026-09-20. Published by Data SDK.
| Decision |  Data SDK | Warmly |
|---|---|---|
| Main focus | Worldwide company identification and page context. | Visitor identification connected to real-time AI engagement. |
| Identification | Company-level; no individual identity or proven intent. | Markets person-level identification; confirm supported regions and identification methods. |
| Working style | Use available company details in your research process; confirm delivery. | Visitor signals paired with onsite engagement and AI-assisted conversations. |
| API and resale | Full API coming soon. Confirm access and white-label/resale rights. | Ask for current API, embedding, and redistribution terms. |
What the vendor documents
- Warmly markets person-level website identification alongside real-time AI engagement. Warmly visitor-identification product page
- Its installation guide describes a website snippet used to identify and aggregate traffic for sales and marketing workflows. Warmly script guide
When to consider Warmly
Evaluate Warmly when the requirement includes engaging visitors while they are on the site, not only researching a company later.
When to evaluate Data SDK
Evaluate Data SDK when you want company-level context for a relevant next step in your existing sales or marketing process.
Data SDK offers worldwide company-level visitor identification with available company details and pages viewed. It does not identify the person or prove buying intent. The full API is coming soon; white-label scope and resale terms require agreement. Start free trial opens an email request. Pricing and usage limits are not published.
Ask before choosing.
What does the onsite experience do, which visitors can be identified, and where does your team approve engagement?
- Test useful matches in your own markets, including startups and larger businesses.
- Compare like-for-like company records; distinguish contacts from the person who visited.
- Confirm required integrations, data handling, contract length, pricing units, and any API or resale rights.
A useful pilot.
Test the full website experience as well as the output record. Assess visitor experience, handoff quality, and your review controls.
What this comparison does not establish.
Data SDK is not claiming live chat or a sales-agent product. Person-level claims should be evaluated separately from company recognition.
Written by Data SDK using its stated product scope and the linked vendor documentation. Vendor statements are attributed claims, not independent performance tests. Fit guidance is our assessment. This directory covers selected relevant alternatives, not every provider. Prices, plan eligibility, coverage, and terms should be confirmed directly.