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Knock2 turns anonymous website traffic into actionable sales intelligence. By combining a lightweight tracking script with a powerful enrichment engine, Knock2 identifies the companies and contacts visiting your site, scores each visitor against your ideal customer profile (ICP), and surfaces the results in real time — all through a clean REST API and configurable webhook alerts. Whether you’re a solo founder looking for your next customer or a revenue team managing thousands of accounts, Knock2 gives you the context you need to act fast on high-intent signals.

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Key capabilities

Visitor Identification

Resolve anonymous IP traffic to named companies and individual contacts using Knock2’s global identity graph. No form fills required.

Lead Scoring

Every identified visitor is automatically scored against your ICP criteria — firmographic fit, page intent, and visit frequency — so your team always knows who to call first.

Contact Enrichment

Go beyond company-level identification. Knock2 enriches visitor records with job title, LinkedIn profile, email, and phone data so you can reach the right person directly.

Webhooks

Receive instant HTTP push notifications whenever a high-scoring visitor lands on your site. Pipe alerts straight into Slack, your CRM, or any downstream system.

Filter Sets

Define reusable filter rules — by industry, employee count, intent page, ICP score, and more — to segment your visitor stream and focus on the accounts that matter most.

Multi-Tenant

If you’re building on top of Knock2 as a platform, the multi-tenant API lets you provision and manage isolated sub-tenants, each with their own tracking, data, and API keys.

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How it works

Knock2 operates as a four-stage pipeline that runs automatically once you embed the tracking script on your site.
  1. Tracking script fires — A single <script> tag on your site sends an anonymous session event to Knock2 every time a visitor loads a page.
  2. Visitor is identified — Knock2 resolves the visitor’s IP and session signals against its enrichment database, linking the session to a known company and, where possible, a named contact.
  3. Data is available via API — The identified account and contact records appear immediately in the REST API under /v1/accounts and /v1/contacts, enriched with firmographics, ICP score, and visit history.
  4. Webhook alerts fire — If the visitor matches a configured filter set, Knock2 fires a webhook to your endpoint in real time, carrying the full account and contact payload.
Identification accuracy improves over time as Knock2 correlates repeat visit patterns. Most customers see meaningful identification rates within the first 24–48 hours of going live.

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What’s next

Quickstart

Install the tracking script and make your first API call in under five minutes.

Authentication

Learn how to get your API key, pass it in requests, and handle authentication errors.