Understand your customers beyond just their name and email address.
Powerful identity data and intelligence for every business.
Trusted Partners
Spotlight
The Role of Identity Resolution in Building an AI Data Foundation
FullContact supports your business in linking multiple identifiers into a single customer record. Our Identity Resolution gives AI agents the single source of truth they need to interact confidently and accurately.
Take control of your first-party data.
First-party data isn’t just the information stored in customer records. It tells a story of who that individual is, their interests, and all of the different ways they’ve interacted with your business.
Organize and enhance your most powerful data to create consistent customer experiences across the board—from operations, to product development, to sales and marketing.
Know Your Customers, Start to Finish
Identify. Resolve. Enrich.
Identify the people on your site, connect every record they leave behind, and add the context your teams and AI agents need to act.
Acumen Lead Identification
Turn Anonymous Visitors Into Named Leads
Not every interested buyer fills out a form. Acumen identifies B2B visitors on your site in real time. It shows their professional contact info, their LinkedIn profile, and the pages they viewed, so sales can reach out while interest is high.
- 45-70% of site visitors recognized by the typical Acumen customer
- 100+ leads with professional emails in the first week, on average
- Slack alerts the moment a high-intent visitor is identified
14-day free trial. No credit card required.
Resolve
One Person, One Profile
Customers show up as an email in one system, a device ID in another, and a phone number somewhere else. Resolve links those fragments, whether the visitor is signed in or anonymous, into a single profile. Each profile gets a portable PersonID you can use across your stack and ad platforms.
- Deduplicate lead, customer, and account records to cut wasted spend
- Activate PersonID in virtually any advertising network
- Keep your data yours with access to our identity graph
Enrich
Turn One Identifier Into a Complete Profile
Start with an email, a phone number, a name and address, or a mobile ad ID. Enrich appends 900+ personal and professional attributes, drawn from 248 million US profiles that receive 200 million updates every day.
Use it the way your team works:
- Enrich API: Real-time enrichment in your product, CRM, or pipeline
- Web App: Upload a CSV and download enriched records—no developer required
- Batch Delivery: Enriched files delivered on your schedule
Model Context Protocol
Give Your AI Agents Real Customer Context
FullContact MCP connects Claude, Cursor, Copilot, Gemini, and other MCP-compatible tools to Enrich data using your API key. No complex code is required. Your agents can grade and route leads, fill gaps in CRM records, and turn a list of emails into a pipeline with full context
MarTech/AdTech Platforms
Stand out as a complete customer platform
Platforms have promised unified customer data for ages. Now you can finally deliver on a true, single customer view to power clients’ customer recognition, personalization, media amplification, and more.
Consumer Brands
Deliver stellar experiences that customers expect
Get to know real people, in real time to create more meaningful — and profitable — customer interactions. No handling of PII necessary, and you keep full control of your own data.
Publishers
Enable hyper-targeted engagement across channels
Transform anonymous website traffic into precise customer segments by connecting online and offline data. Resolve user identities with 700+ behavioral insights, boosting match rates up to 85% while protecting data privacy and delivering a true single customer view.
Create exciting opportunities with Identity Resolution
There are endless possibilities to make identity resolution work for your brand.
Get started by seeing how many contact fragments in your CRM or CDP belong to the same person.