Guides
Mobile Visitor Identification: Fix Your Biggest Blind Spot
60%+ of B2B traffic comes from mobile but most ID tools fail on phones. Learn why mobile identification is harder and which tools actually work.
Guides
What Is an Identity Graph? Definition & 2026 Guide
An identity graph links devices, emails, cookies, and offline data to real people. The 2026 guide: how graphs work, what quality means, what to ask vendors.
Guides
Deterministic vs Probabilistic Matching Explained
Deterministic matching uses verified data. Probabilistic uses statistical guessing. Learn the difference, accuracy tradeoffs, and which tools use which.
Guides
Identity Resolution APIs for AI Agents (2026)
AI agents need real-time identity data. Compare identity resolution APIs by agent-readiness: webhooks, latency, SDK support, MCP servers, and data freshness.
Guides
What Is Identity Resolution? A Technical Primer
Identity resolution matches anonymous signals to known people. Learn how it works, deterministic vs probabilistic methods, and why it matters for B2B sales.
Guides
How Identity Graphs Work (And Why They Matter)
Learn how identity graphs power visitor identification, why match rates vary from 5% to 40%, and how to evaluate tools based on the data behind them.
Guides
7 Things You Can Build with an Identity Resolution API
From AI sales agents to white-label platforms. Seven production use cases for identity resolution APIs with architecture diagrams and code examples.
Guides
Person-Level vs Company-Level Visitor Identification
Person-level vs company-level visitor identification: how identity graphs work, real match rates, and which approach fits your B2B team.
Guides
Identity Resolution APIs Compared (2026)
Compare 10 identity resolution APIs on pricing, match rates, data depth, and developer experience. From $147/mo self-serve to $200K/yr enterprise.
Guides
Self-Serve Identity Resolution APIs (No Sales Call)
Most identity resolution APIs require enterprise contracts. These don't. Compare self-serve options you can start using today with just an API key.
Guides
B2B Identity Resolution API: Developer Guide (2026)
How B2B identity resolution APIs work, what data they return, and how to evaluate them. Endpoints, matching methods, and integration patterns.
Guides
Identity Resolution API Pricing: Complete Guide
How much do identity resolution APIs cost? From free tiers to $200K/yr enterprise contracts. Pricing models, hidden costs, and cost-per-resolution math.
Reviews
FullContact vs Leadpipe: Identity API Compared
FullContact and Leadpipe both offer identity resolution APIs. Compare match rates, data depth, intent data, pricing, and developer experience head-to-head.
Guides
Identity Graph APIs: How They Work (Technical Guide)
How identity graphs store, match, and resolve person data. Graph structure, matching algorithms, confidence scoring, and API patterns explained for developers.