The practical difference.
Sources checked 2026-09-20. Published by Data SDK.
| Decision |  Data SDK | Lead Forensics |
|---|---|---|
| Main focus | Worldwide company identification and page context. | Business visitor identification with company activity and optional contact data. |
| Identification | Company-level; no individual identity or proven intent. | Business-level matching; contact data is separate from identification of the visitor. |
| Working style | Use available company details in your research process; confirm delivery. | Review matched businesses and their website activity in a sales process. |
| 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
- Lead Forensics says it matches IP addresses to businesses and offers optional contact data for employees of matched companies. Lead Forensics customer FAQ
- Its data overview describes pages viewed, repeat activity, and available firmographic details. Lead Forensics data overview
When to consider Lead Forensics
Evaluate Lead Forensics when your buying process includes both company-visit context and a separate contact-research requirement.
When to evaluate Data SDK
Evaluate Data SDK when company-level fit and pages viewed are the information you need to choose the next business to research.
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.
Does the proposed agreement include contact data, and how is a suggested contact distinguished from the actual visitor?
- 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.
Have sellers review a sample of company records without seeing the vendor name. Check fit, missing fields, and usefulness for a legitimate conversation.
What this comparison does not establish.
Do not compare a contact database with verified visitor identity. Data SDK does not promise person-level identification.
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.