FullContact
Real-time identity resolution API that unifies personal and professional identifiers into privacy-safe person profiles.
Sub-100ms resolution API; common embedded identity layer inside other martech products.
Ownership
- Acquired by Ziff Davis · closed Oct 2024 · source · In the Martech Market Report
Ziff Davis (NASDAQ: ZD) bought FullContact's assets in Q4 2024, placed them in its Cybersecurity and Martech segment, and announced the deal on 2 January 2025.
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FullContact Pros & Cons
Key strengths and limitations to consider, drafted by an AI model from public sources
Strengths
- Supports API-based identity matching and enrichment
- Combines identity resolution with profile data enrichment
- Designed for first-party and privacy-focused use cases
- Can complement an existing warehouse or CDP
Limitations
- Public pricing and package boundaries are not transparent
- Less complete journey orchestration than enterprise CDPs
- Data coverage and match rates require market-specific validation
- Product direction may change after the Ziff Davis acquisition
Ideal For
Who benefits most from FullContact, drafted by an AI model from public sources
Quick Analysis
FullContact operates in the identity resolution and data enrichment segment between customer data infrastructure and advertising activation. Its core products resolve fragmented identifiers such as email addresses, phone numbers, names, cookies, and mobile advertising IDs into persistent person or household-level profiles, then append demographic, behavioral, and audience attributes for downstream marketing and analytics use.
Its main strengths are API-oriented identity matching, person-level enrichment, audience development, and support for privacy-conscious first-party data strategies. It is a better fit for brands, agencies, publishers, and data platforms that need an identity graph or enrichment layer rather than a full customer data platform. Compared with LiveRamp, FullContact is more focused on identity resolution and enrichment APIs than on a broad activation network; compared with Experian Marketing Services and Acxiom, it is generally more developer-oriented and less dependent on large managed-data services; compared with Neustar Fabrick, it offers a narrower but more composable identity capability.
Buyers should evaluate FullContact when identity stitching, profile enrichment, and audience interoperability are the primary requirements and the organization already has a warehouse, CDP, or activation stack. Buyers seeking end-to-end journey orchestration should look at alternatives such as LiveRamp, Segment, or a full CDP. Before purchase, validate match rates by identifier and geography, data provenance and refresh cadence, consent and deletion workflows, coverage outside the United States, downstream activation destinations, API latency and volume limits, and the post-acquisition product roadmap under Ziff Davis.
Retailer matching hashed emails and phones to unify online and offline shoppers
Agency onboarding advertiser CRM records for audience activation and suppression
Publisher resolving logged-in and anonymous identities for audience packaging
B2B company enriching contact records before account-based advertising
Franchise brand deduplicating customer profiles across regional systems
Data team enriching warehouse profiles before analytics and paid-media syncs
Capabilities
Core Capabilities
Pricing
Model
custom
Estimated cost
$6,000–$83,000 per year
Third-party estimate of what buyers typically pay. The vendor publishes no price.
Checked and not offered
6 capabilities that other identity resolution tools are built around, which FullContact does not appear to cover. Each was checked against FullContact's own documentation in three separate AI passes, and only a majority verdict is recorded — the count is on each row.
A gap is not a fault — a product that does one job well is a reasonable thing to buy. It is only expensive when you find out after signing.
Searched docs for ad-platform and channel audience synchronization.
Checked: https://platform.fullcontact.com/docs· 2 of 3 passes agreed it is absent
Searched docs for ad targeting and retargeting.
Checked: https://platform.fullcontact.com/docs· 3 of 3 passes agreed it is absent
Searched docs for a governed data marketplace.
Checked: https://platform.fullcontact.com/docs· 3 of 3 passes agreed it is absent
Searched docs for marketing attribution and media mix modeling.
Checked: https://platform.fullcontact.com/docs· 3 of 3 passes agreed it is absent
Searched docs for dashboards, reports, and data visualization.
Checked: https://platform.fullcontact.com/docs· 3 of 3 passes agreed it is absent
Searched docs for a shared interoperable cookieless advertising ID.
Checked: https://platform.fullcontact.com/docs· 3 of 3 passes agreed it is absent
Read from public documentation, and documentation lags shipping. If you work at FullContact and this is out of date, and we will record the correction against your name.
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