For data and marketing ops teams stitching together customer records, FullContact is an identity resolution platform that matches emails, phone numbers, and device IDs to a single customer profile across every touchpoint and system.
Presence & Market Position
Tracked · below panel floor — earned mentions are accruing toward the next scored window.
Measures earned, engagement-weighted share of voice across the GTM voices panel. Methodology →
FullContact's position is infrastructure rather than front end: an identity resolution layer that matches emails, phone numbers, and device IDs into one customer profile so other marketing and data systems can key off it consistently. It's built for data and marketing ops teams stitching together customer records across systems, with Sierra Club and Concord Direct among the named customers. Tracked conversation and score data are thin for the brand right now, a quieter footprint despite over a decade of operating history behind the product.
RocketReach
HG Insights
Store Leads
Wappalyzer
AdaptSierra Club, Concord Direct
Work at FullContact? Claim this profile to add customers and case studies.
Business Profile
FullContact started in Denver in 2010 as a developer-first contact enrichment API, matching social and public data to fill in customer records for CRMs and sales tools, before pivoting toward enterprise identity resolution with its Resolve product in 2020. Ziff Davis acquired the business in the fourth quarter of 2024, folding it in as the identity resolution unit of its martech portfolio alongside Moz, Campaigner, and iContact. The product, API, and roughly 60-person team continue operating under that umbrella, with FullContact having raised $55.3M prior to the acquisition and last reporting $17.1M in annual revenue.
Agent Readiness
Measures how easily your agents can build on it — API, MCP, CLI, SDK, docs depth. Methodology →
FullContact pairs its identity-resolution API with an MCP server that gives Claude, OpenAI, Cursor, Windsurf, Copilot, and Gemini direct query access to resolved customer and prospect profiles. Shipped agent use cases center on lead grading and routing, CRM data hygiene, high-velocity prospecting, and winback campaigns, extending an existing developer-first API rather than building a separate agent product. The MCP server is available today as a customer preview, ahead of general release.
IS THIS YOUR BRAND?
Claim this profile
Fact-check your data, add context, and earn the verified badge — free, takes minutes, work email required.
Claim FullContact →