Clearbit vs. FullContact (vs. ZoomInfo): Which Data Enrichment Platform Fits Your GTM Needs in 2026?

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 AI-powered GTM platform built on a large 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 context fuels AI to show not just what happened, but why it happened and which actions to take next. Your team can run sales motions from the GTM Workspace for sellers, launch plays from GTM Studio for marketers and RevOps, or power their own tools through the API and MCP in any front-end.

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.

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.

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.

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, refreshes monthly at no credit cost, and works through bulk uploads and workflow triggers.

For HubSpot users, this is as frictionless as enrichment gets.

But Clearbit doesn't provide direct-dial phone numbers or mobile numbers. It doesn't offer a searchable prospecting database. And it publishes no match rate or accuracy benchmarks by geography or industry, making it hard to evaluate coverage 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. Company enrichment returns basic data: name, location, employee count, SIC and NAICS codes, and social profiles.

FullContact's coverage is also geographically constrained. The company does not do business with companies looking for identity resolution outside of the United States, and its 3X recognition guarantee applies only to U.S.-based people. Any company with international buyers hits a 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 is the critical difference. 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.

In a Fortune 500 competitive RFP analyzing 25 million contacts across vendors, the independent consultant concluded that "no other competitor came even close."

Platform lock-in is the defining trade-off for Clearbit

Clearbit's acquisition by HubSpot created a binary decision 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, with customers like Gong reporting a 70% increase in demo requests. Basic enrichment is included at no extra cost for Starter+ seats, making adoption nearly automatic.

Source: HubSpot

If you're not on HubSpot, Clearbit doesn't exist for you.

Breeze Intelligence is available only inside HubSpot. There is no Breeze Intelligence API, no Salesforce integration, and no path to use the 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 on April 30, 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 real, but it requires developer resources to implement and maintain.

ZoomInfo provides both deep integration and broad compatibility.

The App Marketplace lists 120+ integrations across CRMs (Salesforce, HubSpot, Dynamics), marketing automation (Marketo, Eloqua), sales engagement (Salesloft, Outreach), and data warehouses (Snowflake, Databricks).

Beyond pre-built connectors, API access is included in all relevant plans, and ZoomInfo's MCP server connects AI models directly to ZoomInfo's B2B data with no custom coding. You're not locked into ZoomInfo's UI, and you're not locked out if you use a different CRM.

Intent signals and website visitor identification take different forms

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. You can configure up to 10 visitor intent criteria based on page paths (pricing page visits, case study reads) and set thresholds for minimum visits.

Research Intent extends this beyond your own site to find companies researching relevant topics across the web. It's useful but operates at the company level only, 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. The typical Acumen customer recognizes 45-70% of website visitors.

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 that separates 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.

The prospecting gap separates enrichment from go-to-market

This is where the three platforms diverge most sharply.

Clearbit enriches the records you already have. If a lead fills out a form, the Clearbit appends company data and hides unnecessary fields. But it cannot help you find new prospects. Legacy Clearbit Prospector provided a searchable database of 200 million contacts, but Breeze Intelligence does not work 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 PII that the organization doesn't already have. FullContact resolves and enriches identifiers you submit, but it is not a place to discover new leads. Acumen generates leads from your own website traffic, but that's visitor identification, not 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.

For teams running outbound sales, this gap matters. Enrichment without prospecting means you depend on inbound traffic and existing contacts. In a market where Gartner predicts a 25% decline in inbound search traffic by 2026, relying solely on enriching inbound leads is a narrowing strategy.

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/month and Enterprise plans including 5,000 credits/month.

Source: HubSpot

Additional credits cost $10 per 1,000. Credits 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 and the no-rollover policy penalizes teams with variable monthly volumes.

FullContact uses split pricing. Acumen has published tiers: Essentials at $99/month (150 leads, 14-day analytics history) and Core at $300/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.

Source: FullContact

Acumen plans require 12-month subscriptions. Enterprise contracts auto-renew unless 30 days' written notice is provided, and payment obligations are non-cancelable and fees paid are non-refundable.

ZoomInfo uses custom-quoted, seat-and-credit-based pricing with no published dollar amounts. Plans span three tiers (Professional, Advanced, Enterprise) across Sales and Marketing product lines, with credits consumed on data export rather than on searches.

ZoomInfo Lite is a permanent free tier with 10 monthly export credits, and a 7-day free trial is available for the full platform. ZoomInfo is actively shifting toward consumption-based pricing for enterprise customers.

ZoomInfo is the premium option in this comparison. The pricing reflects the scope: you're not buying an enrichment add-on; you're buying a complete go-to-market intelligence platform.

Teams evaluating cost should weigh it against the alternative: subscribing to separate tools 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), and a human QA team reviews the data.

Source: Clearbit

Newer features like Smart Properties let users create AI-powered properties using natural language prompts ("What ERP does this company use?"), 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 a single intelligence layer that captures why deals move or stall.

Inside GTM Workspace, AI agents (built on Anthropic's Claude) 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.

Privacy and compliance take different shapes

All three platforms maintain solid compliance postures, but their approaches differ based on the data they handle.

Clearbit inherits HubSpot's compliance infrastructure, including the Trust Center and Product Specific Terms. Clearbit independently holds SOC 2 Type 2 certification, TLS v1.2/v1.3 encryption in transit, and AES-256 at rest, and is registered as a data broker in California. A Privacy Request Form handles individual data access, correction, or erasure requests.

FullContact is SOC 2 Type II, PCI, and Cloud Security Alliance certified, with a GDPR (CIPP/E) certified executive in leadership. The company extends GDPR and CCPA principles to all users, not just those under those regulations. Identity Streme provides an encrypted private environment where customer data is never mixed with other clients' data, and PII is deleted upon ingestion.

A consumer-facing Privacy Portal lets individuals view, delete, or opt out of their data. Because FullContact handles consumer data (household income, interests, financial indicators), this privacy infrastructure is essential to its credibility.

ZoomInfo maintains the broadest compliance stack: ISO 27001, ISO 27701, SOC 2 Type II, TRUSTe GDPR, and TRUSTe CCPA certifications, all renewed annually. ZoomInfo is a registered data broker in California and Vermont. For enterprise buyers in regulated industries (financial services, healthcare), the depth of ZoomInfo's compliance infrastructure often becomes a deciding factor.

Clearbit vs. FullContact vs. ZoomInfo: Which should you choose?

The right platform depends on what problem you're solving and where your data needs to live.

Choose Clearbit if:

• You're a HubSpot customer on a paid tier who needs CRM enrichment with zero setup

• Your primary need is filling in missing company data on inbound leads

• Form shortening to improve conversion rates is a priority

• You don't need a prospecting database or direct-dial phone numbers

• Company-level website visitor identification within HubSpot's ecosystem is sufficient

Learn more about Breeze Intelligence within HubSpot.

Choose FullContact if:

• You're a MarTech platform, publisher, or enterprise brand running consumer identity resolution

• You need to unify fragmented consumer identifiers across advertising and personalization channels

• Your audience is exclusively in the United States

• Privacy-safe, person-level identity resolution is a technical requirement

• You have developer resources to integrate an API-based platform into your stack

Start FullContact's 14-day free trial.

Choose ZoomInfo if:

• You need a complete B2B go-to-market platform, not just enrichment

• Verified direct-dial phone numbers and business emails are essential for outbound prospecting

• You want intent signals that reveal when accounts are researching your category

• Your tech stack spans multiple CRMs and tools that need the same intelligence

• You want AI that reasons about deal context, not just normalizes data fields

• Global coverage matters for your business

Start with ZoomInfo Lite for free, or explore the full platform with a 7-day trial.

Clearbit is a strong enrichment layer for the HubSpot ecosystem.

FullContact is a specialized identity resolution platform for consumer-facing use cases.

But for B2B go-to-market teams that need to find buyers, understand when they're ready, and reach them with verified contact information, ZoomInfo provides the data foundation, the intelligence layer, and the broad access that neither Clearbit nor FullContact was built to deliver.