Apollo.io vs Clearbit (HubSpot) in 2026

Core Differences at a Glance

Apollo.io and Clearbit both touch the B2B data layer, but they approach it from opposite directions and serve fundamentally different workflows. Apollo.io is a full-stack sales platform that bundles lead discovery, contact data, email sequencing, a phone dialer, and analytics into a single product. A sales rep can log into Apollo, build a prospect list filtered by industry, company size, and job title, enrich those records with verified emails and phone numbers, launch a multi-step outreach sequence, and track engagement metrics -- all without leaving the platform. Plans start at $49 per user per month for the Basic tier, making it accessible to early-stage teams and individual reps running their own pipeline.

Clearbit, now owned by HubSpot following the acquisition in late 2023, is an API-first data enrichment engine. It does not help you find new contacts or send emails. Instead, Clearbit takes the data you already have -- an email address, a company domain, an IP address -- and returns a rich profile of firmographic, technographic, and demographic attributes. This enrichment powers use cases like lead scoring, form shortening, website personalization, and CRM data hygiene. Clearbit's paid enrichment plans start at approximately $99 per month, while HubSpot CRM customers can access a free tier of Clearbit enrichment data integrated directly into their CRM records. The distinction matters: Apollo is built for outbound prospecting workflows, while Clearbit is built to make your existing data smarter. Choosing between them depends on whether your bottleneck is finding new leads or understanding the leads you already have.

Feature Comparison

The table below maps how Apollo.io and Clearbit compare across the categories that matter most when evaluating tools in the lead prospecting and data enrichment space. Each row reflects capabilities we verified during hands-on testing and cross-referenced with current product documentation from both vendors.

Apollo.io -- Full Breakdown

Apollo.io has evolved from a prospecting database into a comprehensive outbound sales platform that consolidates multiple point solutions into one tool. The contact database is the foundation, with over 275 million verified contacts and 73 million company profiles indexed across industries, geographies, and company sizes. Sales reps can filter this database by job title, seniority level, department, company revenue, employee count, technology usage, and dozens of other attributes to build targeted prospect lists. Each record includes verified email addresses and, on higher-tier plans, direct dial phone numbers. The data quality is maintained through a combination of machine learning models and community-verified updates, with Apollo reporting email accuracy rates above 91 percent across its database.

Beyond data, Apollo provides a full outreach engine. Email sequences support multi-step campaigns with automatic follow-ups, A/B testing on subject lines and body copy, and engagement tracking that shows opens, clicks, and replies in real time. The built-in dialer allows reps to make calls directly from the platform, with call recording, voicemail drop, and local presence dialing available on the Professional plan at $79 per user per month. Workflow rules automate lead routing, task creation, and sequence enrollment based on prospect behavior or data attributes. Apollo also includes buyer intent signals that flag companies actively researching topics related to your product, helping reps prioritize accounts that show in-market behavior.

The platform integrates with Salesforce, HubSpot, Outreach, and SalesLoft, plus offers a Zapier connector for broader automation. The Chrome extension works on LinkedIn profiles and company websites, surfacing contact data and allowing reps to add prospects to sequences without switching tabs. Apollo's Organization plan at $119 per user per month adds advanced reporting, call transcription, and higher API limits for teams that need programmatic access. For a detailed walkthrough of these capabilities, see our Apollo.io review.

Clearbit (HubSpot) -- Full Breakdown

Clearbit approaches B2B data from an entirely different angle than Apollo. Rather than offering a database you search, Clearbit provides APIs that enrich records you already have. The Enrichment API is the core product: pass in an email address or company domain, and Clearbit returns over 100 attributes including company name, industry, employee count, estimated revenue, technology stack, social media profiles, and individual-level data such as job title, seniority, and location. This data powers downstream workflows like lead scoring models, smart routing rules, dynamic website personalization, and form shortening that reduces friction for inbound leads.

Clearbit Reveal is another key capability that Apollo does not offer. Reveal identifies companies visiting your website based on IP address resolution, even when visitors have not filled out a form. This turns anonymous traffic into actionable account-level intelligence, which marketing teams use to trigger targeted ad campaigns, personalize website content, or alert sales reps when high-value accounts are showing interest. The data Clearbit provides per company is generally deeper and more granular than what Apollo includes in its contact records, particularly around technology stack detection, where Clearbit tracks adoption of over 200 individual technologies.

Since HubSpot acquired Clearbit, the integration between Clearbit's enrichment data and HubSpot CRM has deepened considerably. HubSpot CRM customers get a free tier of Clearbit data that automatically populates company and contact records with firmographic attributes as soon as a new record is created. Paid enrichment plans starting at approximately $99 per month unlock higher API call volumes, more granular data fields, and features like Reveal. Clearbit also integrates with Salesforce, Segment, Marketo, and other marketing platforms through its API and pre-built connectors. However, Clearbit does not include any outreach capabilities -- no email sending, no sequences, no dialer, no prospect search. It is purely a data layer that makes other tools smarter. Our Clearbit review explores these capabilities and limitations in detail.

Pricing Comparison

Apollo.io and Clearbit use fundamentally different pricing structures that reflect their different product philosophies. Apollo charges per user seat with tiered plans that unlock progressively more features and higher usage limits. Clearbit charges based on API call volume and the depth of enrichment data required, with a free tier exclusively for HubSpot CRM users. Understanding the cost implications of each model is essential for making a sound purchasing decision.

Apollo.io offers a free plan with limited credits for basic prospecting. The Basic plan costs $49 per user per month (billed annually) and includes access to the full contact database, email sequencing with limited sends, and basic CRM integrations. The Professional plan at $79 per user per month adds the dialer, call recording, advanced reporting, and higher email sending limits. The Organization plan at $119 per user per month unlocks call transcription, custom permissions, advanced API access, and dedicated support. For a five-person sales team, Apollo's annual cost ranges from roughly $2,940 on the Basic plan to about $7,140 on the Organization plan.

Clearbit's pricing is less transparent. Enrichment plans start at approximately $99 per month for lower API call volumes, scaling upward based on the number of records enriched and the modules activated (Enrichment, Reveal, or both). HubSpot CRM customers receive a free tier of basic enrichment data that populates company and contact records automatically. For teams that need higher volumes or Reveal functionality, annual contracts can range from roughly $12,000 to $36,000 depending on usage. This means Clearbit can be less expensive than Apollo for teams that only need enrichment on a small volume of records, but it can also cost significantly more for teams running high-volume enrichment or Reveal at scale.

Which Should You Choose?

The right tool depends on whether your primary challenge is generating new pipeline or improving the quality of your existing data. Apollo.io and Clearbit solve different problems, and many teams ultimately use both in their stack. Here are the scenarios where each tool provides the most value based on our testing and analysis of common sales team configurations.

Downsides Worth Knowing

Neither Apollo.io nor Clearbit is without limitations, and understanding these trade-offs before purchasing can save your team from frustration. During our extended testing of both platforms, we identified recurring pain points that surface in user reviews across G2, Capterra, and TrustRadius as well, confirming that these are systemic rather than isolated issues.

Apollo.io's data enrichment, while useful, does not match Clearbit's depth. Apollo provides core firmographic fields like industry, employee count, and revenue range, but it lacks the granular technographic detection, funding history detail, and demographic attributes that Clearbit delivers per record. Teams that depend on data quality for lead scoring or personalization may find Apollo's enrichment insufficient on its own. Additionally, Apollo's email deliverability features are functional but less mature than dedicated email tools, and some users report that the platform's interface can feel overwhelming for reps who only need basic prospecting.

Clearbit's primary limitation is its narrow scope. It does not find new contacts, does not send emails, does not include a dialer, and does not provide outreach automation. Teams that adopt Clearbit still need a separate prospecting tool and a separate outreach tool, which adds both cost and complexity to the stack. Clearbit's pricing can also escalate quickly at high volumes, particularly for the Reveal product, and the lack of transparent published pricing makes it difficult to budget accurately before engaging with sales. Since the HubSpot acquisition, some users on non-HubSpot CRMs have reported that new feature development has increasingly prioritized the HubSpot ecosystem, which may be a concern for Salesforce-first organizations.

Frequently Asked Questions

Below are the most common questions sales and marketing teams ask when evaluating Apollo.io versus Clearbit. Each answer is based on our hands-on testing, verified pricing research from both vendors' official pages, and real-world usage patterns across different team sizes and go-to-market models.

Is Apollo.io better than Clearbit for lead prospecting?

Apollo.io is the stronger choice for lead prospecting because it combines a 275-million-contact database with built-in email sequencing, a dialer, and workflow automation in a single platform starting at $49 per user per month. Clearbit focuses on data enrichment rather than prospecting workflows, so it excels at appending firmographic and technographic details to existing records but does not include outreach tools. Teams that need to find new contacts and run outbound campaigns will get more value from Apollo, while teams that already have contacts and need richer data profiles should evaluate Clearbit.

How does Clearbit's pricing compare to Apollo.io's pricing in 2026?

Apollo.io offers a free tier and paid plans starting at $49 per user per month for the Basic plan, scaling to $79 per user per month for Professional and $119 per user per month for Organization. Clearbit's enrichment plans start at approximately $99 per month, though HubSpot CRM customers can access a free tier of Clearbit data. The pricing models differ fundamentally: Apollo charges per seat with usage credits, while Clearbit charges based on API call volume and enrichment records. For small teams doing outbound, Apollo is typically more cost-effective. For teams focused purely on data quality within HubSpot, Clearbit's free tier may be sufficient.

Can Clearbit replace Apollo.io for a sales team?

Clearbit cannot fully replace Apollo.io for most sales teams because it lacks prospecting, outreach sequencing, and dialer capabilities. Clearbit specializes in enriching existing contact and company records with firmographic, technographic, and demographic data through its API. Apollo provides a complete outbound workflow from finding contacts through sending email sequences and making calls. However, if your team already uses HubSpot for outreach and only needs to improve data quality on inbound leads, Clearbit can handle that specific need without requiring Apollo.

Does Clearbit work with CRMs other than HubSpot?

Yes, Clearbit offers a RESTful API that integrates with any CRM or marketing platform capable of making API calls. However, since HubSpot acquired Clearbit in late 2023, the deepest native integration is with HubSpot CRM, where enrichment data flows automatically into contact and company records. Salesforce integration is available but requires additional configuration. Apollo.io offers native integrations with both Salesforce and HubSpot, plus connections to Outreach, SalesLoft, and other engagement platforms, making it more flexible across diverse sales tech stacks.

Final Verdict

Individual platform assessments are available in our Apollo.io review and the companion Clearbit review. Visit the Lead Prospecting and Data Enrichment category pages for full category overviews. Related comparisons: Apollo.io vs ZoomInfo, Clearbit vs ZoomInfo, Clay vs Clearbit, Apollo.io vs Lusha.