FullContact describes itself as 'a privacy-safe Identity Resolution company' that unifies contact, advertising-identifier, and inferred-characteristic data to build identity graphs for customer-experience, ad-targeting and measurement products. Its footer states it is operated by J2 Martech Corp., 'a Ziff Davis company' (Ziff Davis, Inc. is publicly traded on Nasdaq). The privacy policy discloses collection of advertising identifiers (IDFA, Google Advertising ID, MAIDs), cookies, engagement/inference data, and states that some data received from providers may let FullContact infer legally sensitive characteristics (health, religion, political opinion, immigration status), which are folded into the identity graph and 'may be shared in FullContact Data Services we offer to Users.' Consumers can opt out of behavioral advertising via a Privacy Portal. FullContact runs a security vulnerability-disclosure program via the third-party platform Bugcrowd; no public bug-bounty reward schedule, named-firm audit, or breach/regulator action was found in this research.
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FullContact's privacy policy's data-processing table discloses collection of Transaction Information, Account Info, Location Information (IP address, city/zip code), Engagement Data, Connection/Advertising Identifiers (IDFA, Google Advertising ID, MAIDs) and Cookies, retained for 'Life of the account + legally compliant period thereafter' under a stated legal basis for each purpose.
FullContact's own website footer states the FullContact trademark and site are operated by J2 Martech Corp., described as 'a Ziff Davis company' — Ziff Davis, Inc. being a publicly traded (Nasdaq: ZD) parent.
FullContact's privacy policy states that data received from providers may let it infer legally sensitive characteristics (health, religious/philosophical beliefs, political opinions, citizenship/immigration status), and that these inferred characteristics 'are included in our identity graph and may be shared in FullContact Data Services we offer to Users' — i.e., inferred sensitive-category data is a disclosed input to FullContact's commercial data products.
The service's policy indicates the service claims that third parties it shares your personal information with are bound by confidentiality obligations.
FullContact's own security page states it partners with the security research community to improve its security procedures and that potential security risks can be reported to the company through the third-party vulnerability-disclosure platform Bugcrowd.
FullContact's own marketing page for its Mobile Ad ID (MAID) product markets MAIDs to business customers specifically for their persistence relative to cookies, stating cookies have a 7-day lifespan versus roughly 7-8 months for MAIDs, and that MAIDs are 'common across application publishers and set by the OS (not the browser, unlike cookies),' removing the need for cross-app syncing.
The privacy policy's 'Behavioral Advertising' section states FullContact may collect data about a user's behavior while using its services to provide more relevant interest-based advertising on other websites and applications and on its partners' platforms and media channels, and separately discloses use of cookies and similar technologies, including by third-party service providers.