Best B2B Data Providers for Agencies in 2024

Best B2B Data Providers for Agencies in 2024

Updated June 23, 20262,580 words6 tools compared

Agencies need accurate, actionable B2B data to fuel prospecting, lead generation, and client campaigns. Whether you're running outbound campaigns, enriching CRM records, or building targeted account lists, the right data provider can make the difference between hitting quota and missing targets.

But with dozens of options available—from affordable freemium tools to enterprise platforms—choosing the right fit for your agency's specific needs and budget is challenging. This guide reviews the top B2B data providers currently available, comparing their pricing models, data quality, integration capabilities, and ideal use cases.

We've evaluated solutions across different agency sizes and workflows, from solo practitioners managing their own campaigns to multi-team operations serving hundreds of clients.

Quick Comparison

ProductBest ForStarting PriceRatingKey Feature
ApolloSMB agencies and teams$49/user/mo4.6/5AI-powered prospecting with built-in CRM
ZoomInfoEnterprise agenciesContact sales4.5/5Comprehensive B2B database with 200M+ contacts
ClearbitEnterprise agenciesContact sales4.4/5Real-time visitor identification and enrichment
ClayStartup agencies$149/mo4.3/5150+ data sources with automation workflows
Seamless.aiSales teams$147/mo4.5/5Real-time lead database with direct dials
LushaSMB agencies$29/user/mo4.2/5Live signals and intent data for outreach
RocketReachProspectorsContact sales4.1/5Extensive professional contact database

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Detailed Reviews

In-depth analysis of each platform to help you make the right choice.

#1

Apollo

Top Pick

Best For: SMB and mid-market agencies running multi-prospect campaigns

Apollo combines B2B data access with native sales engagement tools, making it the most complete platform for agencies managing their own campaigns or scaling outbound operations. With over 250 million B2B records and AI-powered search capabilities, Apollo enables teams to find, research, and contact prospects without leaving the platform. The freemium model lets you test the data quality before committing, while the per-user pricing scales efficiently as your agency grows.

Pricing: Free tier available; Pro plan starts at $49/user/month; Enterprise custom pricing available

Key Features

  • 250M+ B2B database with real-time updates
  • AI-powered lead search and filtering
  • Built-in email sequencing and calling
  • CRM integration and data sync
  • Account mapping and ABM features

Pros

  • +Most affordable entry point among full-featured platforms at $49/user/month
  • +Integrated email, calling, and CRM eliminate tool-switching friction
  • +Transparent pricing with no seat minimums for paid plans
  • +Quality data with high deliverability rates for email addresses

Cons

  • -Data coverage stronger in US than international markets
  • -Learning curve for new users navigating all features
  • -Free tier has significant limitations on search filters and export limits

Verdict

Apollo is the best overall choice for agencies seeking an all-in-one platform that combines reliable B2B data with engagement tools. If your agency needs to manage campaigns independently without piecing together multiple vendors, Apollo's integrated approach and straightforward pricing make it the strongest value proposition.

#2

ZoomInfo

Best For: Enterprise agencies managing complex multi-client campaigns

ZoomInfo represents the enterprise standard for B2B data, offering one of the industry's largest and most frequently updated contact databases with over 200 million B2B records. The platform extends beyond data provision to include marketing intelligence, intent data, and account-based marketing features. ZoomInfo's API and deep integrations with major CRMs and marketing platforms make it the choice for large agencies managing complex, multi-touch campaigns across multiple client accounts.

Pricing: Custom enterprise pricing; typically $10,000-$50,000+ annually depending on usage and features

Key Features

  • 200M+ B2B contacts with weekly updates
  • Company intent and buying signal data
  • Marketing automation integration suite
  • Account-based marketing (ABM) tools
  • Advanced API for custom integrations

Pros

  • +Most comprehensive B2B database with highest update frequency
  • +Industry-leading intent data identifies companies actively buying
  • +Native integrations with Salesforce, HubSpot, Marketo, and 50+ other platforms
  • +Dedicated support teams and custom implementation assistance

Cons

  • -Requires annual contracts and significant upfront investment
  • -Pricing not transparent; requires sales conversations
  • -Data quality varies by industry and geography
  • -Steep learning curve for maximizing platform features

Verdict

ZoomInfo is essential for large agencies managing significant budget and multi-channel campaigns. The investment is substantial, but the combination of comprehensive data, intent signals, and native integrations justifies the cost for enterprise operations that can afford it.

#3

Clearbit

Best For: Enterprise agencies with significant website traffic and HubSpot instances

Clearbit specializes in B2B data enrichment and real-time visitor identification, making it ideal for agencies running content-driven campaigns where knowing who's visiting your site matters. Now a HubSpot-native app, Clearbit automatically enriches visitor profiles, identifies anonymous companies, and provides buying intent signals. This approach reverses traditional prospecting—instead of finding people and reaching out, you see who's already interested and engage them at the right moment.

Pricing: Custom enterprise pricing; typically $2,000-$10,000+ monthly depending on scale

Key Features

  • Real-time visitor identification and enrichment
  • Company and person data for 50M+ organizations
  • HubSpot native app with automatic syncing
  • Buying intent and technographic data
  • Custom fields and workflow automation

Pros

  • +Identify inbound prospects without outbound prospecting
  • +Automatic enrichment saves manual data entry across HubSpot
  • +Strong technical team and reliable data accuracy
  • +Deep HubSpot integration reduces manual syncing needs

Cons

  • -Only valuable if your agency drives significant qualified website traffic
  • -High pricing limits accessibility for smaller agencies
  • -Primarily designed around HubSpot; less effective outside that ecosystem
  • -ROI depends heavily on content strategy and website conversion fundamentals

Verdict

Clearbit is the right choice for large agencies with mature content programs and HubSpot as their primary CRM. If your agency drives meaningful inbound traffic and operates primarily within HubSpot, Clearbit's automatic enrichment and visitor identification create a compelling ROI that justifies the enterprise pricing.

#4

Clay

Best For: Startup and early-stage agencies prioritizing flexibility and data freshness

Clay represents a different approach to B2B data—instead of owning a proprietary database, Clay connects to 150+ premium data sources and AI research agents in one interface. This model gives you access to LinkedIn, Apollo, ZoomInfo, Hunter, and other sources through a single search interface, plus automation workflows to enrich data and build targeted lists. Clay appeals to agencies that want flexibility and fresh data without being locked into a single vendor's database quality.

Pricing: Free tier available; Pro plan starts at $149/month; Enterprise custom pricing

Key Features

  • 150+ integrated data source connectors
  • AI research agents for custom data gathering
  • Workflow automation for list-building and enrichment
  • No credit card required on free tier
  • Bulk operations and API access on paid plans

Pros

  • +Access multiple data sources through one interface
  • +Transparent pricing with no per-user fees
  • +Flexible pay-as-you-use model for bulk operations
  • +Excellent for teams that value data source options over single database loyalty

Cons

  • -Requires integration setup and API knowledge for some data sources
  • -Overall cost can exceed single-vendor approaches at scale
  • -Fewer native engagement tools than platform competitors like Apollo
  • -Data quality depends on underlying source APIs, creating variable consistency

Verdict

Clay is ideal for startup agencies that want flexibility and access to multiple data sources without enterprise commitments. If your agency values options and wants to avoid vendor lock-in while maintaining control over data sources, Clay's modular approach and transparent pricing make it a strong alternative to monolithic platforms.

#5

Seamless.ai

Best For: Sales teams and agencies prioritizing speed and verified contact information

Seamless.ai focuses on one specific need: finding verified contact information for B2B prospecting. The platform specializes in direct phone numbers and email addresses verified through real-time search, positioning itself as a practical tool for agencies doing high-volume prospecting and outreach. With over 1 million users and a freemium model starting at $147/month, Seamless.ai appeals to teams that need quick, reliable contact data without platform bloat.

Pricing: Free tier available; Core plan starts at $147/month; higher tiers available

Key Features

  • 500M+ verified B2B contacts with direct dials
  • Real-time email verification
  • Mobile number searching capability
  • Browser extension for on-page searching
  • API for custom integrations

Pros

  • +Specialized focus on verified contact information with high accuracy
  • +Browser extension enables quick searching during research workflows
  • +Large existing user base provides social proof of data quality
  • +Mobile number searching is rare among competitors

Cons

  • -Limited platform features outside of contact finding
  • -No native engagement tools; requires separate email/CRM systems
  • -Data quality heavily weighted toward US and Western Europe
  • -Search interface can feel limited compared to platform-style competitors

Verdict

Seamless.ai is the best choice for agencies prioritizing contact accuracy and speed over platform comprehensiveness. If your team needs verified email and phone numbers quickly and already has a CRM and email system in place, Seamless.ai's focused approach and real-time verification deliver strong value without unnecessary features.

#6

Lusha

Best For: SMB agencies seeking affordable access to intent data and automation

Lusha combines B2B contact data with live signals and buyer intent, positioning itself as a middle-ground option for agencies wanting more than basic contact information but without enterprise pricing. Starting at just $29/user/month, Lusha makes sophisticated data access affordable for smaller teams. The platform includes workflow automation, CRM integrations, and live intent signals that indicate when prospects are actively researching solutions.

Pricing: Free tier available; Starter plan starts at $29/user/month; scaling tiers available

Key Features

  • 150M+ B2B contacts with continuous updates
  • Live intent signals and buyer behavior tracking
  • Workflow builder for automation
  • CRM and email platform integrations
  • Chrome extension for inline searching

Pros

  • +Extremely affordable entry point at $29/user/month
  • +Intent data inclusion differentiates from pure contact databases
  • +Workflow automation enables list-building and enrichment at scale
  • +Chrome extension speeds up research workflows

Cons

  • -Data quality and coverage less comprehensive than Apollo or ZoomInfo
  • -Intent signals can be unreliable or delayed
  • -Limited reporting and analytics compared to enterprise platforms
  • -Smaller company means fewer product updates than market leaders

Verdict

Lusha represents excellent value for budget-conscious agencies that want intent data without enterprise pricing. If your agency operates with limited budgets but needs more than basic contact information, Lusha's affordable pricing and workflow automation provide solid capabilities at a price point most teams can justify.

Frequently Asked Questions about best b2b data providers for agencies

B2B data providers focus specifically on finding, verifying, and enriching contact and company information—they answer the question 'who should we contact?' CRM systems like Salesforce or HubSpot manage relationships and communications with prospects and customers. Most agencies use data providers to populate their CRM with qualified contacts, then use the CRM to track interactions and manage the sales process. Many modern providers, like Apollo and Seamless.ai, now include basic engagement tools (email, calling) but remain primarily data platforms. For comprehensive campaign management, you typically need both a data provider and a CRM.

Data accuracy varies significantly between providers and depends on how frequently data is updated and verified. The best providers update records weekly or in real-time rather than monthly. Look for providers that verify data through multiple sources (LinkedIn, company websites, third-party databases) rather than relying on a single source. Email deliverability rates offer a practical accuracy indicator—providers publishing 85%+ deliverability rates typically have higher quality data. You can also request samples before purchasing annual contracts. Pay attention to user reviews mentioning bounce rates and phone number accuracy. Finally, test data with small campaigns before committing to large purchases; real-world results are your best accuracy indicator.

This depends on your client portfolio and campaign complexity. For agencies managing numerous small campaigns across different industries, Apollo or Lusha offer the best balance of features, pricing, and multi-client support through shared workspaces and bulk operations. For enterprise clients requiring sophisticated ABM and intent data, ZoomInfo or Clearbit provide the comprehensive features those budgets demand. Clay works well for agencies that want to serve clients with different data needs without being locked into a single database. Consider that most providers allow team seats and workspace sharing, enabling you to manage multiple client accounts. The ideal provider should scale pricing with your client count without requiring prohibitive investment.

Budget depends on team size, campaign volume, and data comprehensiveness needs. A solo consultant or small agency can start with freemium tiers or entry-level plans ($29-$149/month) and get significant value. Teams of 5-10 people typically spend $500-$2,000 monthly combining a data provider and engagement tools. Mid-market agencies with 20+ employees and complex campaigns often spend $2,000-$10,000 monthly. Enterprise agencies managing multiple client campaigns can spend $10,000-$50,000+ monthly with comprehensive platform bundles. A practical approach: allocate 5-10% of revenue to sales development infrastructure, including data providers, CRM, and engagement tools combined. Start with affordable options like Apollo or Lusha to validate ROI, then upgrade if campaigns prove profitable. Don't overspend on enterprise platforms before proving your need for their advanced features.

Most modern B2B data providers offer native integrations with major CRMs. Apollo, Lusha, and Seamless.ai integrate with HubSpot and Salesforce through official apps or APIs. ZoomInfo offers the deepest CRM integrations given its ownership by Zoom Information and extensive enterprise relationships. Clearbit is now a native HubSpot app, making integration automatic. Clay connects to CRMs through Zapier or custom APIs. Before selecting a provider, verify that it specifically integrates with your primary CRM—integration quality varies significantly. Poor integrations require manual data entry, negating efficiency gains. Check the CRM marketplace or request integration documentation from the data provider. Some platforms require custom development for advanced integrations, so factor that into your decision if you have non-standard systems.

Conclusion

Selecting the right B2B data provider depends on your agency's size, budget, and specific workflow needs. Apollo emerges as the best overall choice for most agencies because it combines affordable pricing, a substantial database, and native engagement tools in one integrated platform. For enterprise agencies managing complex multi-client campaigns with significant budgets, ZoomInfo's comprehensive database and intent data justify the investment. Smaller agencies or those prioritizing data source flexibility should consider Clay's modular approach or Lusha's combination of affordability and intent signals.

The data quality and feature set among top providers have converged significantly, meaning the real differentiator is often pricing model, integration depth, and whether you want an all-in-one platform or component-based approach. We recommend starting with a freemium tier from Apollo or Clay to validate data quality against your specific prospect profiles before committing to paid plans.

Implementing a new data provider effectively requires more than just purchasing access—you need to align it with your CRM, establish data quality standards, and create workflows that maximize the data's value. Many agencies find that working with a implementation partner like RevAlign.io helps accelerate adoption and prove ROI faster. The right data provider, combined with proper workflows, can dramatically improve your campaign results and team productivity.

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