FullContact

By FullContact

Resolve and enrich customer identities with person and company data through APIs.

Identity ResolutionData EnrichmentContact DataEnrichment API
Overview

What is FullContact?

FullContact is an identity resolution and data enrichment platform that connects fragmented customer records into a single person profile. Through its APIs, businesses send an email, phone number, or other identifier and receive matched person and company attributes, social profiles, and demographic data. Marketing, data, and product teams use FullContact to enrich leads and site visitors, unify customer records across systems, and improve targeting, personalization, and audience matching for campaigns.

Best for
Marketing TeamsData EngineersProduct TeamsCustomer Data TeamsGrowth Marketers
Product snapshot
Category
Data Extraction & Collection
Best for
Identity and data enrichment
Deployment
Cloud
Free trial
Contact vendor
Integrations
REST API, Zapier
AI features
No
Key features

Key features of FullContact

Identity resolution

Match emails, phones, and identifiers to a single person profile.

Person enrichment

Add demographic, social, and professional attributes to customer records.

Company enrichment

Append firmographic details such as industry and company size.

Developer API

Well-documented REST APIs let developers add enrichment to applications.

Usage dashboard

Track API calls, match rates, and account usage in one place.

Privacy controls

Return data only when match confidence meets a strict threshold.

Reviews

FullContact reviews

20 reviews

Overall

4.3/5

  • Ease of use4.1/5
  • Customer support3.9/5

What users like

  • Well-documented API for developers
  • Fast and easy to integrate
  • Rich enrichment data returned
  • Many integrations for syncing

What users dislike

  • Match rates can be low
  • Pricing changes and higher tiers
  • Needs developer help to integrate
  • Occasional inaccurate social profiles

Ashley N. B.

Director of Public Policy

“Liked how it pulls web data into contacts, accurate business card transcription, merge review, many integrations, and CSV export. Found a monthly card upload cap, no business account auto-sync, and slow support.”

Sunitha H.

National School Feeding Program Facilitator

“Liked having extensive contact tools in one platform and the many integrations that keep contacts synced across services. Noted no major drawbacks.”

Jason D.

Founder & Managing Partner

“Liked the simple implementation, rich data, strong developer portal, and multiple pricing tiers. Found prices higher than hoped and the enrich and contacts APIs hard to tell apart.”

Paolo P.

CEO

“Liked the ease of use, comprehensive enriched data, fast responses, and helpful support. Found that contact update API calls cost extra and that some returned data is incorrect.”

Write a review

Sign in with your account to review FullContact.

Sign in to review
Alternatives

Top FullContact alternatives

  • ZoomInfo

    Best for

    Enterprise B2B data

    Why choose it

    Large contact and company database

  • Clearbit

    Best for

    B2B data enrichment

    Why choose it

    Real-time company and person enrichment

  • LiveRamp

    Best for

    Identity resolution at scale

    Why choose it

    Privacy-focused identity graph for advertising

  • People Data Labs

    Best for

    Developer data APIs

    Why choose it

    Large person and company datasets

Integrations

FullContact integrations

FullContact is built for developers and data teams, so most integrations run through its REST APIs. Applications send an email address, phone number, or other identifier and receive matched person and company attributes in JSON, which can be written back to a CRM, customer data platform, or data warehouse. Earlier versions also connected with Gmail, Google Contacts, and Zapier for syncing and tagging contacts, and reviewers mention marketing automation connections. A usage dashboard shows API calls and match activity. Teams typically add FullContact enrichment to sign-up flows, lead routing, and customer record unification jobs to fill missing fields and link duplicate profiles together.

FAQ

Frequently asked questions about FullContact