Clearbit vs FullContact: A Detailed Comparison

Choosing between Clearbit and FullContact for data enrichment comes down to five questions:

• Are you enriching B2B professional records for sales and marketing, or resolving consumer identities across advertising channels?

• Is your CRM HubSpot, or do you need a solution that works with any system?

• Do you need verified direct-dial phone numbers and business emails for outbound prospecting, or consumer attributes like household income, interests, and mobile ad IDs for audience targeting?

• Is your customer base in the United States, or do you need global coverage?

• Do you want enrichment as one piece of a larger go-to-market engine, or as a standalone data layer you integrate into your own stack?

In short, here's what we recommend:

Clearbit (now Breeze Intelligence within HubSpot) is the natural choice for HubSpot customers who need B2B data enrichment built into their CRM. It enriches contact and company records with over 40 firmographic, demographic, and technographic attributes, identifies anonymous website visitors at the company level, and shortens forms to improve conversion rates. Since HubSpot acquired Clearbit in December 2023, basic enrichment is included at no extra cost for paid HubSpot seats. The trade-off: Clearbit is now exclusively a HubSpot product. No standalone API, no Salesforce integration, no path to use it outside HubSpot's ecosystem.

FullContact serves a different market. It's a privacy-safe identity resolution platform built around a consumer-focused identity graph containing 248 million U.S. consumer profiles and 900+ data attributes. FullContact unifies fragmented consumer identifiers (emails, phone numbers, mobile ad IDs, cookies) into a single persistent PersonID for MarTech platforms, publishers, and enterprise brands running advertising and personalization programs. However, its coverage is limited to the United States, it provides no outbound prospecting database, and it requires technical integration work as a developer-first API platform.

Both platforms solve real problems for specific audiences. But if your goal is to find, reach, and win B2B buyers, both leave gaps. Clearbit locks you into HubSpot and offers no prospecting database. FullContact focuses on consumer identity, not B2B sales intelligence. Neither provides verified direct-dial phone numbers, intent signals that reveal when accounts are researching solutions, or an AI layer that turns data into go-to-market recommendations.

ZoomInfo is an all-in-one AI GTM Platform built on the industry's most comprehensive B2B data foundation: 500M contacts, 100M companies, 135M+ verified phone numbers, and 200M+ verified business email addresses. Its GTM Context Graph, which processes 1.5B+ data points daily, unifies this data with your CRM records, conversation transcripts, and behavioral signals to reveal the full context of your accounts. That intelligence fuels AI that shows not just what happened, but why it happened and which actions to take next. Your team can run sales motions from GTM Workspace for sellers, launch plays from GTM Studio for marketers and RevOps, or power their own tools through the Enterprise API and ZoomInfo MCP in any front-end. ZoomInfo is free to start with consumption credits based on usage.

If you want to see how ZoomInfo's data and intelligence can power your go-to-market motion, start a free trial.

Clearbit vs. FullContact vs. ZoomInfo at a glance

These platforms solve different problems

Comparing Clearbit and FullContact head-to-head is misleading. They don't compete. They occupy adjacent but distinct markets, and understanding that distinction saves you from buying the wrong tool.

Clearbit started as a developer-first B2B enrichment API. You submitted an email address, and it returned company name, employee count, industry, role, seniority, and tech stack. It was CRM-agnostic and popular with product-led growth companies that needed to enrich signups in real time.

Then HubSpot acquired it in December 2023, rebranded it as Breeze Intelligence, and eliminated the standalone product. Today, Clearbit exists only inside HubSpot. Its B2B enrichment capabilities remain strong for HubSpot users, but the audience that can access them has narrowed dramatically. If you run Salesforce, Microsoft Dynamics, or any CRM other than HubSpot, Clearbit is simply not available to you.

FullContact evolved in the opposite direction. It started as a contact enrichment API (similar to early Clearbit) but pivoted toward consumer identity resolution.

Its Person-Centered Identity Graph maps fragmented online and offline consumer identifiers into unified profiles. The data skews consumer: household income, net worth, interests, purchase behavior, mobile ad IDs, and 330 data elements in the Individual Plus bundle alone.

Its primary buyers are MarTech platforms, publishers, and enterprise brands running ad personalization programs, not B2B sales teams. The geographic constraint compounds this: FullContact's identity resolution covers the United States only, which means any B2B team selling into EMEA, APAC, or LATAM will find no coverage.

ZoomInfo occupies the B2B go-to-market space with a scope neither Clearbit nor FullContact approaches.

Beyond enrichment, it provides a searchable prospecting database, buyer intent signals, conversation intelligence via Chorus, website visitor identification, sales automation, and account-based marketing, all connected through the GTM Context Graph.

Where Clearbit fills in CRM fields and FullContact resolves consumer identities, ZoomInfo powers the revenue motion from target account identification through deal execution.

CRM compatibility and integration depth

This is the operational decision point that often resolves the evaluation before any other factor.

Clearbit's HubSpot acquisition created a hard boundary for buyers: are you on HubSpot, or aren't you? If you are, the integration is strong. Enrichment happens directly inside the HubSpot CRM with no API configuration. Enriched data immediately powers lead scoring, workflow routing, campaign segmentation, and personalization tokens. Form shortening hides fields that Clearbit can fill from an email address alone. Basic enrichment is included at no added cost for paid HubSpot seats, making adoption nearly automatic.

If you're not on HubSpot, Clearbit does not exist for you. There is no Breeze Intelligence API, no Salesforce integration, and no path to use Clearbit data in Dynamics, Pipedrive, or any other CRM. The legacy Clearbit APIs that once served any tech stack have been absorbed into HubSpot-only delivery. Legacy free tools (the Connect Chrome extension, Weekly Visitor Report, TAM Calculator) were sunset in 2025.

FullContact takes the opposite approach. As a developer-first, API-centric platform, it integrates with any system that can make REST API calls. Native integrations exist for Snowflake, Adobe Experience Platform, Segment, Tealium, and Zapier. The flexibility is genuine, but it requires developer resources to implement and maintain. There are no pre-built connectors for Salesforce or HubSpot CRM workflows; RevOps teams manage the integration layer.

ZoomInfo provides both deep integration and broad compatibility. The App Marketplace lists 120+ integrations across CRMs (Salesforce native, HubSpot native, Microsoft Dynamics), marketing automation (Marketo, Eloqua), sales engagement (Salesloft, Outreach), and data warehouses (Snowflake, Databricks). Beyond pre-built connectors, the Enterprise API is included in all relevant plans, and ZoomInfo MCP connects AI models directly to ZoomInfo's B2B data without custom coding. You're not locked into ZoomInfo's UI, and you're not locked out if you use a different CRM.

For RevOps teams evaluating vendor consolidation potential, the integration question determines whether a tool reduces or adds to operational overhead. Clearbit reduces it only if you're already on HubSpot. FullContact adds it unless your team has developer capacity. ZoomInfo is the only option in this comparison that works across the full enterprise CRM landscape without requiring a separate integration layer.

Smartsheet is one example of what ZoomInfo's native integration model enables at scale: using ZoomInfo Marketing (including FormComplete), Smartsheet achieved a 40% increase in form fills, an 84% increase in MQLs, a 26% increase in opportunity rates, and a 59% increase in win rates. FormComplete shortens forms by enriching email addresses in real time, the same use case Clearbit's form shortening addresses, but without requiring HubSpot as the underlying CRM. Full details at the Smartsheet case study.

Enrichment depth and data coverage diverge sharply

All three platforms enrich records, but the data they return and the records they cover are not interchangeable.

Clearbit enriches with over 40 B2B attributes: company name, industry, employee count, revenue, tech stack, job title, normalized role and seniority, and corporate hierarchy. One notable strength is its simultaneous delivery of 6-digit NAICS, 8-digit GICS, and 4-digit SIC codes in a single record, which is uncommon among enrichment vendors. Enrichment runs automatically on new records and refreshes monthly at no credit cost.

For HubSpot users, this is as frictionless as enrichment gets. But Clearbit does not provide direct-dial phone numbers or mobile numbers. It does not offer a searchable prospecting database. And it publishes no match rate or accuracy benchmarks by geography or industry, making coverage hard to evaluate before committing.

FullContact returns far more attributes per record (900+ across all Insights Bundles), but these skew toward consumer data. Bundles include demographics, household composition, net worth, investment activity, consumer interests (gaming, fashion, streaming preferences), email engagement signals, and mobile advertising IDs. The Professional bundle provides current job title, organization, and business email, but B2B company data depth is not FullContact's strength.

FullContact's coverage is also geographically constrained. The company does not provide identity resolution outside the United States, and its 3X recognition guarantee applies only to U.S.-based people. Any company with international buyers hits a hard wall.

ZoomInfo enriches with 300+ company attributes and provides what neither competitor offers: 135M+ verified phone numbers, including 120M direct dials, and 200M+ verified business email addresses.

For B2B sales teams, this difference is decisive. A direct dial that rings is worth more than fifty enriched company fields if your job is to start conversations. ZoomInfo also tracks 30,000+ technologies across 200+ categories and maintains parent-child corporate hierarchies for enterprise account mapping. On data quality, ZoomInfo publishes verifiable claims: up to 95% accuracy on first-party data, maintained by 300+ human researchers alongside automated ML scanning of 28 million site domains daily.

Intent signals and website visitor identification

Knowing who visits your website and researches your category is where data enrichment becomes actionable intelligence.

Clearbit's Buyer Intent identifies companies visiting your website using IP intelligence, filters them against your ideal customer profile, and surfaces results in a visitor dashboard with 90-day lookback. Research Intent extends this beyond your own site to find companies researching relevant topics across the web. These features operate at the company level, not the individual level.

FullContact approaches visitor identification differently. Its Customer Recognition identifies both authenticated and unauthenticated website visitors at the person level, claiming up to 80% more unauthenticated visitors identified compared to authenticated-only methods. Acumen, the company's B2B lead identification product, converts anonymous traffic into named individuals with professional emails and LinkedIn profiles. This is person-level resolution, not company-level IP matching, which is a meaningful technical distinction.

ZoomInfo combines both approaches and adds a dimension neither competitor offers. WebSights resolves anonymous website traffic to companies, with Automatic Traffic Filtering separating real visitors from bots. ZoomInfo Intent tracks signals from 210 million IP-to-Organization pairings and 6 trillion+ new keyword-to-device pairings sourced monthly, identifying companies actively researching your category across the broader web. Guided Intent goes further: it automatically identifies which topics historically correlate with your closed-won deals rather than requiring you to guess which keywords matter. These signals connect directly to verified contacts with phone numbers and emails, so the path from "this account is in-market" to "call this person" is a single step.

ZoomInfo was named a Leader in the Forrester Wave for Intent Data Providers (Q1 2025), receiving the highest possible scores across eight criteria. Neither Clearbit nor FullContact competes in this category.

The GTM intelligence gap

Both Clearbit and FullContact solve a real problem: they enrich records with attributes. But enrichment tells you what a company looks like, not whether they are ready to buy, what message will land, or which action to take next.

Neither platform offers a verified outbound prospecting database. Neither provides native intent signals that identify in-market accounts across the broader web. Neither has an AI layer that connects enriched data to the next best action across the full revenue team.

That gap is where ZoomInfo enters the conversation.

ZoomInfo is built on three connected capabilities. First, a B2B data foundation at a scale neither competitor matches: 500M contacts, 100M companies, 135M+ verified phones, and 200M+ verified emails, continuously refreshed by automated ML and 300+ human researchers. Second, the GTM Context Graph, an intelligence layer that fuses this data with CRM records, conversation transcripts, and behavioral signals to surface the full context of your accounts, capturing not just what happened but why it happened and which accounts are most likely to close. Third, universal access so you can act on that intelligence in any workflow: through GTM Workspace for sellers, GTM Studio for marketers and RevOps teams, or through the Enterprise API and ZoomInfo MCP for any AI agent or custom front-end.

Where Clearbit tells a HubSpot user which fields to fill and FullContact tells a MarTech engineer how to resolve a consumer identity, ZoomInfo tells a revenue team which accounts to prioritize today, why those accounts are in-market, and how to reach them.

Momentive (now SurveyMonkey) used ZoomInfo Operations to cut speed-to-lead from 20 minutes to 60 seconds by automating CRM data enrichment and routing. Full details at the Momentive case study.

See how ZoomInfo's GTM intelligence can power your team. Start a free trial.

The prospecting gap separates enrichment from go-to-market

Clearbit enriches the records you already have. It cannot help you find new prospects. Breeze Intelligence does not function as a prospecting database or contact finder. You can identify companies visiting your website, but you still need another tool to find the specific people to contact.

FullContact is equally explicit about this limitation. The company states it does not sell lists or audiences for marketing purposes and will not provide personally identifiable information that the organization does not already have. FullContact resolves and enriches identifiers you submit. Acumen generates leads from your own website traffic, but that is visitor identification, not outbound prospecting.

ZoomInfo is built for prospecting. The platform gives you access to 500M contacts and 100M companies, searchable by 300+ attributes including industry, company size, job function, seniority, technology stack, and department org charts. You can build targeted lists, export them to your CRM or sales engagement tool, and trigger automated outreach workflows, all from one platform. ZoomInfo Lite provides permanent free access to this database with 10 monthly export credits.

Pricing models reflect different target markets

Clearbit is embedded in HubSpot's subscription model. Basic enrichment (contact and company records, monthly refresh, form shortening) does not consume credits for paid HubSpot subscribers. Advanced features like Buyer Intent and Smart Properties consume HubSpot Credits, with Professional plans including 3,000 credits per month and Enterprise plans including 5,000 per month. Additional credits cost $10 per 1,000 and do not roll over month to month. For HubSpot customers already paying for Professional or Enterprise seats, this is compelling: basic enrichment at no added cost. The challenge comes with advanced features, where credit consumption can be unpredictable.

FullContact uses split pricing. Acumen has published tiers: Essentials at $99 per month (150 leads, 14-day analytics history) and Core at $300 per month (500 leads, 90-day history, phone numbers included). Resolve, Enrich, and Identity Streme require direct sales contact with no public pricing. FullContact charges only when data is returned (no match, no charge). Acumen plans require 12-month subscriptions, and enterprise contracts auto-renew unless 30 days written notice is provided. Payment obligations are non-cancelable and fees paid are non-refundable.

ZoomInfo is free to start with consumption credits based on usage. ZoomInfo Lite provides permanent free access, and a free trial is available for the full platform. Credits are consumed on data export rather than on searches, and the model scales with usage rather than with fixed seats. ZoomInfo is the premium option in this comparison: you are not buying an enrichment add-on but a complete go-to-market intelligence platform. Teams evaluating cost should weigh it against the alternative: separate subscriptions for enrichment, prospecting, intent data, conversation intelligence, and sales automation.

AI capabilities range from data normalization to go-to-market intelligence

Clearbit uses AI primarily for data quality. Its LLMs convert unstructured web content into standardized, normalized outputs (standardized roles, seniority tiers, multi-standard industry codes). Newer features like Smart Properties let users create AI-powered properties using natural language prompts, and a Data Agent answers custom research questions about prospects. These features are useful but stay focused on enriching individual records within HubSpot.

FullContact uses machine learning for confidence-based identity matching, scoring the trustworthiness of each identity link based on source quality, connection density, and a proprietary Belief Vector. This lets buyers tune confidence levels on a request-by-request basis to balance precision against match rate. The company positions identity resolution as the data layer for AI agents, arguing that AI amplifies flawed data rather than correcting it.

ZoomInfo's AI spans the full go-to-market workflow. The GTM Context Graph unifies CRM records, conversation transcripts, intent signals, and behavioral data into an intelligence layer that captures why deals move or stall. Inside GTM Workspace, AI agents handle account research, draft personalized outreach, monitor buying signals, and update CRM fields. GTM Studio lets marketers and RevOps teams describe audiences in natural language and launch multi-channel plays without engineering support.

The results are documented. Seismic attributed 39% of pipeline to ZoomInfo signals and saved 11.5 hours per week per seller. GTM Workspace users report boosting pipelines by 23% and booking nearly 60% more meetings per week.

Full comparison

Frequently asked questions

Can Clearbit work outside of HubSpot?

No. Since HubSpot acquired Clearbit in December 2023 and rebranded it as Breeze Intelligence, Clearbit is exclusively available inside HubSpot. There is no standalone API for non-HubSpot customers. Teams using Salesforce, Microsoft Dynamics, or other CRMs cannot access Clearbit or Breeze Intelligence. For more on Clearbit's pricing and product transition, see our Clearbit pricing page.

Does FullContact have global or international coverage?

No. FullContact's identity resolution platform covers U.S. consumer profiles only. Its 248 million profiles and 900+ attributes are U.S.-based. The company explicitly states it does not provide identity resolution services outside the United States. For global B2B data coverage, ZoomInfo provides 34M+ company profiles outside North America, 200M+ professional profiles globally, and 45M+ mobile numbers outside NA.

What is the best alternative to Clearbit and FullContact for B2B outbound teams?

For B2B outbound teams that need verified direct-dial phone numbers, a searchable prospecting database, intent signals, and CRM-agnostic integrations, ZoomInfo is the most comprehensive option. Unlike Clearbit (HubSpot-only, no prospecting database) and FullContact (consumer identity, U.S.-only), ZoomInfo provides 500M contacts, 135M+ verified phones, native intent data, and 120+ CRM and sales engagement integrations. For a broader list of options, see our Clearbit alternatives page.

Is FullContact good for B2B sales prospecting?

No. FullContact explicitly does not sell contact lists and is not designed for B2B outbound sales. It is a consumer identity resolution platform built for MarTech and advertising use cases. B2B sales teams looking for a prospecting database with verified emails and direct-dial phones should evaluate ZoomInfo, Apollo, or similar B2B-first platforms.

How does ZoomInfo compare to Clearbit for data enrichment?

Both enrich company and contact records, but their scope, CRM compatibility, and commercial models differ significantly. Clearbit (Breeze Intelligence) enriches inside HubSpot with 40+ attributes and is included with paid HubSpot seats. ZoomInfo enriches CRM records through ZoomInfo Operations with 300+ verified attributes, integrates natively with Salesforce, HubSpot, Dynamics, and 120+ other tools, and pairs enrichment with intent signals and GTM Context Graph intelligence that converts data into next-best-action recommendations across the full go-to-market motion. ZoomInfo is free to start with consumption credits based on usage.

What happened to Clearbit after the HubSpot acquisition?

HubSpot acquired Clearbit in December 2023 and rebranded it as HubSpot Breeze Intelligence. The standalone Clearbit free tools (Free Platform, Weekly Visitor Report, TAM Calculator, Clearbit Connect, Slack Integration) were sunset on April 30, 2025. The Logo API was sunset December 1, 2025. Clearbit's enrichment capabilities now live exclusively inside HubSpot's CRM as a Breeze AI feature, available to paid HubSpot customers via HubSpot Credits. Teams that relied on the standalone Clearbit API before the acquisition no longer have a migration path that keeps them outside HubSpot.

More Clearbit and FullContact comparisons and guides

If you're interested in reading more, you might like:

• Top 10 Clearbit Alternatives and Competitors for 2026

• 7 FullContact Alternatives: Data Enrichment and Identity Solutions for Every GTM Need (2026)

• Bombora vs. Clearbit (vs. ZoomInfo): Which B2B Data Platform Fits Your Go-to-Market Strategy in 2026?