Warmly AI Website Visitor Intelligence API
Warmly AI website visitor intelligence REST API for B2B sales and marketing teams to identify and engage anonymous website visitors with company-level and contact-level intelligence for revenue automation. Enables AI agents to manage website visitor company identification (de-anonymization by IP) for intent signal automation, handle contact-level identification from Warmly's identity graph for sales outreach automation, access visitor intent scoring based on page views and session behavior for sales prioritization automation, retrieve real-time visitor alerts and notifications for SDR response automation, manage automated outreach sequencing triggered by website intent for sales engagement automation, handle CRM enrichment with website visitor data for lead intelligence automation, access AI-powered chat engagement triggered by visitor intent for conversational automation, retrieve account-level website engagement analytics for ABM automation, manage Slack and CRM integration for real-time sales intelligence delivery, and integrate Warmly with Salesforce, HubSpot, Outreach, Salesloft, and Slack for end-to-end website visitor-to-pipeline automation.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
Visitor intelligence. GDPR, CCPA, SOC2. API key. US. Website visitor and company identification data.
⚡ Reliability
Best When
A B2B sales and marketing team wanting AI agents to automate website visitor company identification, intent-based outreach triggering, SDR alert delivery, and CRM enrichment through Warmly's revenue intelligence platform.
Avoid When
GDPR COOKIE CONSENT FOR VISITOR TRACKING: Warmly website visitor tracking uses cookies and IP intelligence; GDPR and ePrivacy Directive require cookie consent for EU website visitors before tracking; automated visitor identification without cookie consent banner compliance creates GDPR ePrivacy violation for EU visitors; implement GDPR-compliant cookie consent before Warmly deployment on EU-facing websites. IP-TO-COMPANY MATCH ACCURACY LIMITATIONS: Warmly company identification uses IP address to company matching; IP-to-company accuracy varies by company size (enterprise VPNs improve accuracy; SMB home office workers reduce accuracy); automated outreach triggered on IP match alone has false positive rate from residential ISP IP addresses; implement confidence scoring threshold for automated outreach trigger. CCPA BUSINESS PURPOSE RESTRICTION FOR CALIFORNIA VISITORS: California visitor data collected through Warmly must be used for disclosed business purposes under CCPA; automated use of California visitor data beyond disclosed sales prospecting creates CCPA data use restriction violation; include website visitor data use in CCPA privacy notice.
Use Cases
- • Identifying website visitors from sales intent signal agents
- • Triggering outreach from website visitor intent agents
- • Enriching CRM from account website engagement agents
- • Alerting SDRs from real-time visitor intelligence agents
Not For
- • Consumer website traffic analysis (B2B company identification only)
- • HIPAA-regulated website visitor tracking in healthcare
- • High-precision individual consumer identification
Interface
Authentication
Warmly uses API key for integrations. JavaScript SDK for website tracking. REST API with JSON. San Francisco, California HQ. Founded 2020 by Max Greenwald, Carina Boo, and Alan Zhao. Backed by Felicis Ventures, Y Combinator, Bain Capital Ventures ($20M+ raised). Products: Website visitor identification, intent scoring, AI chat, CRM enrichment, Slack alerts. Integrations: Salesforce, HubSpot, Outreach, Salesloft, Slack, 6sense, Clearbit. Identity graph from multiple data sources. Competes with Leadfeeder (Dealfront), Albacross, and Visitor Queue for website visitor intelligence.
Pricing
San Francisco CA. Felicis, YC, Bain Capital Ventures backed. Reveal-based pricing. Free limited tier. AI-powered.
Agent Metadata
Known Gotchas
- ⚠ REVEAL CREDIT CONSUMPTION AND PRIORITIZATION: Warmly charges credits per company reveal; automated reveal for all website visitors consumes credits rapidly; implement visitor scoring (page depth, session time, target account match) to prioritize reveals for highest-intent visitors; automated all-visitor reveal without prioritization exhausts credits on low-intent browsing
- ⚠ VISITOR IDENTIFICATION DELAY FROM JAVASCRIPT SDK LOAD: Warmly visitor identification requires JavaScript SDK to load and execute; automated outreach triggered immediately after visitor lands may precede Warmly identification completing; implement minimum page engagement threshold before automated outreach trigger to ensure visitor identification has completed
- ⚠ CRM DEDUPLICATION FOR ENRICHED LEADS: Warmly CRM enrichment creates or updates lead records; automated enrichment without deduplication check creates duplicate CRM records for known contacts visiting the website; implement CRM contact existence check before Warmly-triggered lead creation
- ⚠ ACCOUNT-LEVEL vs CONTACT-LEVEL IDENTIFICATION DISTINCTION: Warmly identifies companies (account-level) more reliably than specific individual visitors (contact-level); automated outreach that assumes contact-level identification for all reveals may send personalized outreach to wrong person at company; design automated outreach to account-level when contact identification confidence is below threshold
- ⚠ INTENT SIGNAL RECENCY WINDOW: Warmly intent signals decay in relevance after peak engagement window; automated outreach triggered by Warmly intent signals should occur within 24-48 hours of visit; automated outreach queued for more than 48 hours after high-intent visit loses the timing advantage of real-time website engagement context
Alternatives
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Scores are editorial opinions as of 2026-03-07.