Visitor identification software resolves anonymous website visitors to a company-level record using reverse-IP enrichment, ISP filtering, and firmographic data. In 2026 the urgent reason to deploy it is attribution: a growing share of B2B research traffic arrives from AI engines, and without identification those sessions vanish from your funnel before sales sees them.
Visitor identification software is a script on your website that watches every session, resolves the IP to a company using a reverse-IP and ASN graph, enriches the record with firmographics, scores intent in real time, and routes hot accounts into Slack and your CRM. The best tools in 2026 also tag which AI engine sent the visit.
| Layer | What it produces |
|---|---|
| Resolution | Company name, domain, industry, employee count, revenue band. |
| Filtering | ISP, VPN, and bot traffic stripped from the account stream. |
| Intent scoring | Per-session score from page path, scroll, time, and questions asked. |
| AI attribution | Engine of origin (ChatGPT, Perplexity, Claude) tagged at session start. |
| Routing | Slack, HubSpot, Salesforce, signed webhooks — fired under a second. |
The two are halves of the same loop. AEO/GEO gets your brand cited in AI answers, which sends buyers to your site. Visitor identification reveals which companies arrived from those citations — closing the ROI loop on GEO investment. SiteSonar runs both in one product →