Clearbit vs. Apollo (vs. ZoomInfo): Which B2B Data Platform Fits Your GTM Strategy in 2026?

If you're comparing Clearbit vs. Apollo, you're comparing two different philosophies of how B2B data should work. One has been absorbed into a CRM. The other has expanded into an all-in-one sales platform. Neither tells the full story of what's available.

The questions that matter:

• Do you need a standalone data platform, or are you locked into HubSpot and want enrichment built into your CRM?

• Is your priority enriching records you already have, or finding new prospects you haven't identified yet?

• Do you need outbound sales tools (sequences, dialer, email) alongside your data, or just the data itself?

• How important is it that your data provider works with your existing tech stack, regardless of which CRM you use?

• Are you a small team running your own outreach, or an enterprise that needs data infrastructure feeding multiple teams and AI agents?

In short, here's what we recommend:

Clearbit (now Breeze Intelligence) is HubSpot's native data enrichment layer. Acquired by HubSpot in December 2023, Clearbit enriches contact and company records with over 40 firmographic, demographic, and technographic attributes, identifies anonymous website visitors, and shortens web forms using real-time data lookups.

For HubSpot users, the integration is simple: basic enrichment is included in all Starter+ seats at no extra credit cost. But the acquisition came with a tradeoff. Clearbit no longer works outside HubSpot. There's no standalone API for other CRMs, no prospecting database for outbound list building, and no outreach tools. If you don't use HubSpot, Clearbit isn't an option.

Apollo calls itself an AI sales platform that bundles a 270M+ contact database, multichannel outreach sequences, a built-in dialer, email deliverability tools, deal management, and conversation intelligence into a single product.

Its free-forever Starter plan and self-serve pricing (paid plans from $49/seat/month) make it accessible to individual contributors and small teams. Apollo covers more ground than Clearbit: it's a data provider and an engagement platform. But its CRM capabilities are less mature than dedicated CRMs, its credit system creates complexity, and its data coverage in non-English markets requires testing before committing.

Both platforms serve their core audiences well. But Clearbit's HubSpot lock-in limits who can use it, and Apollo's all-in-one approach trades depth for breadth. For teams that need the largest verified B2B dataset, intelligence that explains why deals move (not just what happened), and the flexibility to use that data in any tool, there's a third option worth evaluating.

ZoomInfo is an AI GTM platform built on a large data foundation: 500M contacts, 100M companies, 135M+ verified phone numbers, and 200M+ verified business emails. 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 that shows not just what happened, but why it happened, and what to do next. Your team can run sales from the GTM Workspace, build GTM plays in GTM Studio, or power their own tools through the API and MCP in any other front-end. No CRM lock-in, no tool lock-in.

If the largest B2B dataset, AI-powered deal intelligence, and the freedom to use it anywhere sounds like what your team needs, see how ZoomInfo works.

Clearbit vs. Apollo vs. ZoomInfo at a glance

Clearbit is now a HubSpot feature, not a standalone product

This is the most important thing to understand about Clearbit in 2026.

HubSpot acquired it in December 2023 and rebranded it as Breeze Intelligence at INBOUND 2024. All of Clearbit's former free tools (the Connect Chrome extension, Weekly Visitor Report, TAM Calculator) were sunset on April 30, 2025. The standalone APIs that once served any CRM are gone.

What remains is a data enrichment layer inside HubSpot. Within that context, it works well. Basic enrichment costs no credits for paid HubSpot subscribers. Continuous enrichment refreshes records monthly. Form shortening, which removes fields that Clearbit can fill from an email address alone, no longer consumes credits and has driven 50%+ conversion lifts for customers like Gong and Mention.

But the scope is narrow. Clearbit enriches records you already have. It does not provide a searchable prospecting database. It does not offer outbound tools. It does not work with Salesforce, Dynamics, or any other CRM. If you're evaluating Clearbit, the first question isn't whether the data is good. It's whether you're on HubSpot.

ZoomInfo approaches the problem differently. Instead of embedding enrichment inside a single CRM, it provides company and contact data, intent signals, and enrichment that work across multiple CRMs and GTM tools, giving teams access to the same data foundation regardless of which system they use.

Apollo bundles data and outreach, but depth varies

Apollo takes the opposite approach: do everything in one place.

Founded in 2015 and valued at $1.6B after a $100M Series D in 2023, Apollo has grown from an affordable data provider into what it calls an "AI sales platform" covering data, outreach, dialing, deal management, and conversation intelligence.

The breadth is genuine. An SDR can build a prospect list, launch a multichannel sequence, make calls with the Parallel Dialer, and track deals from a single login. Apollo claims customers save 53.4% on average by consolidating tools, and its free-forever Starter plan lets individuals start without procurement approval.

Source: Apollo

The tradeoff is depth. Apollo's 270M+ contacts represent solid coverage, but the platform itself acknowledges uneven international data by advising prospects to "sign up for a free account and run a quick search by region" rather than publishing coverage metrics by geography.

Its deal management is less mature than Salesforce or HubSpot for complex enterprise workflows. And the credit system introduces friction: credits don't roll over, the "Unlimited" plan has caps under a Fair Use Policy, and API access requires a Custom plan.

For small and mid-market teams that want one tool instead of five, Apollo delivers real value. For enterprise teams that need comprehensive data, intelligence, and flexibility in how they access it, the limitations matter.ZoomInfo takes a different architectural approach. Rather than combining data and outreach primarily for individual sellers, it focuses on building a large B2B data foundation and intelligence layer that powers sales, marketing, and RevOps workflows across multiple tools and systems.

Data coverage is not a tie

The three platforms operate at different scales, and the gap is large.

Clearbit provides 200M+ company and buyer profiles with over 40 attributes per record.

Its strength is data normalization: Clearbit provides 6-digit NAICS, 8-digit GICS, and 4-digit SIC codes simultaneously, plus corporate hierarchy fields (parent domain, ultimate parent domain) that solve enterprise lead routing. HubSpot does not publish match rates or accuracy benchmarks, making direct comparison difficult.

Apollo covers 270M+ contacts and 70M companies with 65+ data attributes.

It claims a 91% email accuracy rate backed by a 7-step verification process, verifying 72 million emails and refreshing 150 million contacts monthly. Its contributor network of over 2 million data sources feeds crowdsourced verification from connected inboxes and CRMs.

Source: Apollo

ZoomInfo has the largest coverage: 500M contacts, 100M companies, 135M+ verified phone numbers, 120M direct-dial phone numbers, and 200M+ verified business email addresses.

The data comes from automated ML scanning of 28 million site domains daily, third-party partners covering 95 million businesses, a community of 200,000+ ZoomInfo Lite users who share data back, and 300+ human researchers. First-party data reaches up to 95% accuracy.

The difference isn't just quantity. In a Fortune 500 competitive RFP analyzing 25 million contacts across vendors, the independent consultant concluded that "no other competitor came even close." ZoomInfo also profiles the tech stacks of 30+ million companies, tracking 30,000+ technologies across 200+ categories, a level of technographic depth neither Clearbit nor Apollo matches.

For sales teams, the practical impact is direct: more verified phone numbers that ring, more business emails that land, and more complete account pictures that don't require stitching together multiple vendors.

Intent data: three different approaches

Knowing who your buyers are matters less if you don't know when they're buying.

Clearbit offers two intent layers within HubSpot.

Buyer Intent uses IP intelligence to identify which companies visit your website, filtered by page paths you designate as buying signals (pricing pages, product pages, case studies).

Source: Clearbit

Research Intent extends beyond your site, identifying companies researching relevant topics across the broader web. Both are useful, but both live inside HubSpot. You can't export these signals to ad platforms or feed them into non-HubSpot workflows.

Apollo includes Buying Intent data on all plans at no extra charge, covering over 1,600 topics via a partnership with LeadSift (a Foundry company).

Source: Apollo

The claimed 98% accuracy rate is notable, and including intent even on the free tier is a real differentiator against competitors who charge separately.

ZoomInfo runs the largest intent infrastructure of the three.

ZoomInfo Intent tracks signals from 210 million IP-to-Organization pairings and 6 trillion+ new keyword-to-device pairings sourced monthly. Its exclusive feature, Guided Intent, identifies which topics have historically correlated with closed deals in your pipeline, rather than requiring manual topic selection.

Source: ZoomInfo

Forrester named ZoomInfo a Leader in Intent Data Providers for B2B (Q1 2025), awarding the highest possible scores across eight criteria.

The key distinction: Clearbit tells you who visited your site. Apollo tells you who's researching your category. ZoomInfo tells you which signals predict closed deals in your pipeline, then connects those signals to verified contacts and recommended actions.

Intelligence vs. data: where ZoomInfo separates

Both Clearbit and Apollo deliver data. ZoomInfo delivers context.

The GTM Context Graph is ZoomInfo's intelligence layer.

It fuses ZoomInfo's third-party B2B data with a customer's CRM records, conversation transcripts (captured by Chorus), email interactions, and behavioral signals. The result is a system that captures not just what happened in a deal, but why.

ZoomInfo CPO Dominik Facher gives this example: a CRM records that a deal moved from Stage 3 to Stage 4. Conversation intelligence transcribes what the VP of Finance said. Intent data logs a research spike. None of these systems alone can explain the connection.

The GTM Context Graph reasons across all three to identify why the deal accelerated (executive sponsorship entering at a specific stage, combined with ROI-focused questions, matching the pattern behind closed-won deals in your segment) and what that predicts about next steps.

This intelligence produces measurable outcomes.

Seismic's sales team attributed 39% of active pipeline to opportunities identified by ZoomInfo signals, reported 54% productivity gains, and saved 11.5 hours per week per seller.

Snowflake uses ZoomInfo for over 70 company attributes and technographic data fields in their propensity scoring model, achieving 90% higher opportunity open rates and 2x higher customer conversion rates on top-scoring accounts.

Neither Clearbit nor Apollo offers a comparable intelligence layer. Clearbit enriches records. Apollo adds AI-generated email copy and call summaries. ZoomInfo connects patterns across thousands of deals to predict what works next.

Outbound and engagement capabilities

Clearbit offers no outbound tools.

It enriches records and identifies website visitors, but sending emails, making calls, and running sequences require separate platforms.

Apollo covers the full outbound workflow.

Sequences support email, phone, LinkedIn, and custom task steps. The Parallel Dialer lets reps connect with 100+ prospects per hour. Built-in email deliverability includes domain purchase, SPF/DKIM/DMARC authentication, and mailbox warm-up.

Source: Apollo

The Workflow Engine provides visual drag-and-drop automation, with users claiming to book 2.5x more meetings after adoption. For teams that want data and outreach in one tool without managing integrations, this is Apollo's core value.

ZoomInfo provides engagement through multiple channels.

GTM Workspace gives sellers a single screen where AI agents handle account research, outreach drafting, CRM updates, and signal monitoring. The partnership with Salesloft connects ZoomInfo's buyer signals into Salesloft's sequencing and pipeline management.

GTM Studio lets marketers and RevOps design multi-channel plays (email, calls, ads, direct mail) triggered by buyer behavior, using natural language rather than engineering tickets.

ZoomInfo Marketing includes a native Demand-Side Platform for display advertising based on 300+ company attributes, and FormComplete for form shortening (Smartsheet reported a 40%+ increase in form fills and 84% increase in MQLs).

The difference in approach: Apollo gives one person a complete toolkit. ZoomInfo gives entire organizations (sales, marketing, RevOps) coordinated execution powered by the same intelligence layer.

Platform access and flexibility

This is where the three platforms diverge most sharply.

Clearbit is locked to HubSpot.

Breeze Intelligence lives exclusively inside the HubSpot platform. No Salesforce integration, no Dynamics, no API for custom applications. If your company uses a different CRM, or if you switch CRMs later, your Clearbit investment doesn't transfer.

Apollo works with Salesforce, HubSpot, and Pipedrive natively, plus connections through Zapier and its integration marketplace.

However, API access requires a Custom plan, creating a barrier for technical teams that want programmatic access without an enterprise commitment. The Chrome Extension is available on all plans, enabling prospecting on LinkedIn and company websites.

Source: Apollo

ZoomInfo provides the broadest access.

APIs are included in all relevant plans, not gated behind enterprise tiers. The MCP server connects AI models (including Anthropic Claude and ChatGPT) to ZoomInfo's data through natural language, with no custom coding required.

Source: ZoomInfo

The Enterprise API serves teams building custom agents, internal tools, or partner integrations. Native integrations cover Salesforce, HubSpot, Microsoft Dynamics, and 120+ partners in the App Marketplace. Cloud Partners enable direct data ingestion into AWS, Google Cloud, Snowflake, and Databricks.

CEO Henry Schuck described the strategy: "There's definitely incremental budget for AI initiatives inside of companies. Historically, we wouldn't be involved in that budget. Today, we see our pathway into those conversations with our MCP and API technologies."

For teams building their own AI agents or integrating data into proprietary systems, ZoomInfo is infrastructure. Clearbit and Apollo are applications.

Pricing comparison

The three platforms use different models, making direct comparison tricky.

Clearbit doesn't have standalone pricing.

It's embedded in HubSpot's subscription. Basic enrichment is included in all Starter+ Core Seats at no extra credit cost. Advanced features (Buyer Intent, Smart Properties) consume HubSpot Credits, with Professional plans including 3,000 credits/month and Enterprise plans 5,000 credits/month. Additional credits cost $10 per 1,000. Credits don't roll over.

For existing HubSpot customers, the marginal cost of Clearbit enrichment is low. For non-HubSpot companies, the cost is the entire HubSpot subscription plus any credit packs.

Apollo publishes transparent pricing.

The free Starter plan provides 900 credits/year and basic features. Basic is $49/seat/month (annual), Professional is $79/seat/month (annual), and Organization plan is $119/seat/month (annual), with a minimum of 3 seats.

Additional costs include the Advanced Dialer at $149/month (or $119/month annual), per-minute dialer charges, AI research credits, and waterfall enrichment credits. Credits don't roll over and are non-refundable. Seats cannot be decreased during a contract term.

ZoomInfo uses custom-quoted, seat-and-credit-based pricing with no published dollar amounts.

Three product lines (Sales, Marketing, each with Professional/Advanced/Enterprise tiers) let teams match their investment to their use case.

ZoomInfo Lite is a permanent free tier with 10 monthly export credits, access to the B2B database, CRM enrichment, the Chrome extension, and WebSights Lite.

A 7-day free trial provides broader access. ZoomInfo is premium-priced, but enterprise buyers evaluate it against documented outcomes: Seismic's 11.5 hours saved per seller per week, Snowflake's 200% higher conversion rates, and Thomson Reuters' 40% increase in closed-won deals.

The pricing reflects positioning. Clearbit optimizes for HubSpot customers who already pay for the CRM. Apollo targets budget-conscious teams who want a lot in one tool. ZoomInfo targets organizations where the ROI of better data and intelligence justifies the investment.

Conversation intelligence and coaching

Clearbit doesn't capture or analyze sales conversations. It's a data enrichment tool.

Source: Hubspot Experts

Apollo includes built-in conversation intelligence with call recording, transcription, AI summaries, an AI chatbot on transcripts, call playlists, and customizable scorecards.

Source: Apollo

For teams that want basic call analysis without buying Gong separately, this is a useful inclusion.

ZoomInfo operates Chorus, a dedicated conversation intelligence platform backed by 14 technology patents.

Beyond recording and transcription, Chorus extracts the context behind conversations: why a deal accelerated, why a champion went quiet, what a competitive mention predicts about deal risk.

This context feeds into the GTM Context Graph. Managers reviewing a call see ZoomInfo's full profile for every participant (contact details, company insights, relationship history) through Connected Intelligence, without cross-referencing a separate system.

Apollo provides conversation capture. ZoomInfo provides conversation understanding.

Security and compliance

All three platforms maintain strong security foundations, but the depth varies.

Clearbit holds SOC 2 Type 2 certification, with TLS v1.2/v1.3 encryption in transit and AES-256 at rest, hosted on AWS and Google Cloud Platform.

It is registered as a data broker in California and maintains a Privacy Request Form for data access and erasure.

Apollo holds ISO 27001 and SOC 2 Type 2 certifications, is GDPR compliant as both Data Processor and Controller, and maintains CCPA, CPRA, EU-US DPF, and CASA Tier 2 certifications.

Infrastructure is hosted on Amazon Web Services.

ZoomInfo maintains the broadest certification stack for regulated enterprise buyers: ISO 27001, ISO 27701 (privacy management), SOC 2 Type II, TRUSTe GDPR and CCPA validations, all renewed annually.

ZoomInfo is a registered data broker in California and Vermont. The ISO 27701 certification (privacy information management) matters for companies selling into the EU or handling sensitive data, and neither Clearbit nor Apollo holds it.

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

The choice comes down to your stack, your scale, and your GTM complexity.

Choose Clearbit if:

• You're already a paying HubSpot customer and need CRM enrichment with zero setup

• Your primary need is filling gaps in inbound records, not building outbound lists

• Form shortening is a priority for your demand generation team

• You don't need outbound tools, a prospecting database, or conversation intelligence

• You're comfortable with enrichment data that stays inside HubSpot

Explore Breeze Intelligence inside HubSpot.

Choose Apollo if:

• You're a small or mid-market team that wants data, outreach, and basic CRM in one platform

• Budget matters, and you want to start free and scale incrementally

• Your team runs high-volume outbound and needs sequences, a dialer, and email deliverability together

• You don't need enterprise-grade data coverage or AI-powered deal intelligence

• You're comfortable with a credit system that requires monitoring

Start with Apollo's free plan.

Choose ZoomInfo if:

• You need the largest verified B2B dataset available

• You want intelligence that connects data, signals, and conversations to explain deal momentum

• Your team spans sales, marketing, and RevOps, and you need coordinated execution across all three

• You want the flexibility to use your data in any tool via APIs and MCP, not locked into one CRM

• You're evaluating vendors for enterprise-scale GTM, where data quality directly impacts pipeline

See ZoomInfo in action with a free trial.

Clearbit made its name as a developer-friendly enrichment API. That product no longer exists independently. Apollo built a compelling all-in-one platform for teams that value breadth and accessibility. ZoomInfo invested two decades into the data infrastructure, intelligence layer, and open access that enterprise GTM teams depend on. The right choice depends on where you are today and where your go-to-market strategy needs to go.