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B2B Data Providers: 14 Best Options Ranked by Size & Accuracy (2025)
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Finding the right B2B data provider can make or break your sales campaigns. With 69% of buyers already 69% through their journey before speaking to a salesperson, having accurate contact data isn’t just helpful—it’s essential for survival.
But here’s the problem: B2B data decays at 22.5% annually, meaning nearly a quarter of your database becomes useless every year. Poor data quality costs businesses an average of $12.9 million annually according to Gartner research.
This guide cuts through the marketing noise to give you the real story on the 14 best data providers in 2025. We’ve ranked them by database size, accuracy rates, and actual user feedback to help you make the right choice.
TL;DR: Quick Comparison Between the Most Trusted B2B Data Providers
For busy sales professionals who need answers fast, here’s the quick breakdown:
🏆 Best Overall: Apollo.io – 275M+ contacts, transparent pricing, all-in-one platform 🎯 Most Accurate: UpLead – 95% accuracy guarantee with real-time verification
💰 Best Value: Kaspr – Affordable LinkedIn extension with quality phone numbers 🌍 Best for Europe: Cognism – GDPR-compliant with verified mobile numbers 🚀 Best for Enterprise: ZoomInfo – 320M+ contacts but premium pricing
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14 Best B2B Data Providers in 2025 (Ranked by Size & Accuracy)
Salesso – The Cold Email Champion
Database Size: 180M+ verified contacts
Data Accuracy: 98% email deliverability guarantee
Best For: Cold email campaigns and email warmup
Salesso leads our list because it’s built specifically for cold email success. Unlike general data providers, Salesso focuses exclusively on email accuracy and deliverability.
Key Features:
- Real-time email verification
- Built-in email warmup tools
- Cold email sequence automation
- Advanced search filters for precise targeting
Pricing: Starts at $49/month with unlimited verified emails
Salesso stands out because it’s not just about finding contact data—it’s about ensuring your emails actually reach the inbox. Their 98% deliverability rate beats most competitors who focus on database size over quality.
Apollo.io – The All-in-One Platform
Database Size: 275M+ contacts
Data Accuracy: Good (mixed user reviews)
Best For: Teams wanting one platform for everything
Apollo.io combines a massive database with sales engagement tools. It’s the Swiss Army knife of B2B data providers.
Key Features:
- Intent data and AI-powered search
- Built-in dialer and call recording
- CRM integrations and data enrichment
- Generous forever-free plan
Pricing: Free plan available, paid plans from $49/month
User feedback is mixed on data quality, especially for LinkedIn prospecting, but the platform’s comprehensive feature set makes it popular with SMBs.
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ZoomInfo – The Enterprise Heavyweight
Database Size: 320M+ contacts
Data Accuracy: High for US data, lower internationally
Best For: Large sales teams with significant budgets
ZoomInfo dominates the enterprise market with the largest database and advanced features.
Key Features:
- Advanced intent data and buyer signals
- AI-powered lead scoring
- Comprehensive technographic data
- Enterprise-grade integrations
Pricing: Custom pricing starting around $14,995/year
The main drawback is cost and annual contract requirements. Data quality drops significantly outside the US and for smaller companies.
UpLead – The Accuracy Expert
Database Size: 160M+ contacts
Data Accuracy: 95% guarantee with real-time verification
Best For: Teams prioritizing data quality over quantity
UpLead’s core value proposition is accuracy first. They guarantee 95% data accuracy and won’t charge for invalid emails.
Key Features:
- Real-time email verification
- 50+ advanced search filters
- Technographic and funding data
- Monthly billing available
Pricing: Starts at $99/month for 170 credits
Perfect for teams tired of high bounce rates from other providers.
Cognism – The European Specialist
Database Size: Strong European coverage
Data Accuracy: 98% for Diamond Data (verified mobiles)
Best For: GDPR-compliant prospecting in Europe
Cognism excels in European markets with phone-verified mobile numbers and strict compliance standards.
Key Features:
- Diamond Data with verified mobile numbers
- GDPR and CCPA compliance
- Intent data from Bombora
- Real-time trigger alerts
Pricing: Custom pricing starting around $25,000/year
Premium pricing but worth it for teams targeting UK, France, and Germany.
Lusha – The LinkedIn Companion
Database Size: 175M+ contacts
Data Accuracy: 80-90% based on user reports
Best For: LinkedIn-focused prospecting
Lusha’s Chrome extension makes it perfect for LinkedIn workflows.
Key Features:
- Seamless LinkedIn integration
- GDPR/CCPA compliance
- User-friendly interface
- ISO 27701 certification
Pricing: Free plan with 50 credits, paid plans from $29.90/month
Warning: Phone numbers can cost 5x more than emails, leading to unexpected credit burn.
Seamless.AI – The AI-Powered Option
Database Size: 1.7B+ contacts claimed
Data Accuracy: Claims 98%, user reviews suggest 50%
Best For: Teams believing in AI-first prospecting
Seamless.AI markets itself as an AI-powered real-time search engine.
Key Features:
- AI-powered search capabilities
- Real-time data enrichment
- Pitch Intelligence features
- Chrome extension
Pricing: Custom pricing, estimated $147+/month
Significant gap between marketing claims and user experiences regarding accuracy.
Kaspr – The Budget-Friendly Choice
Database Size: 500M+ contacts
Data Accuracy: Strong for phone numbers
Best For: Cost-conscious LinkedIn prospecting
Kaspr offers excellent value for LinkedIn-focused teams.
Key Features:
- Free plan with unlimited B2B emails
- Accurate phone number database
- Connection to Cognism data sets
- Real-time verification
Pricing: Free plan available, paid plans from $49/month
Excellent entry-level option with surprising data quality.
Lead411 – The UK Specialist
Database Size: Strong UK coverage
Data Accuracy: GDPR-compliant and verified
Best For: UK market targeting
Lead411 focuses specifically on the UK market with compliant data practices.
Key Features:
- GDPR-compliant database
- Real-time verification
- Cost-effective pricing
- Local market expertise
Pricing: Competitive UK-focused pricing
Saleshandy – The Accuracy Leader
Database Size: Focused database
Data Accuracy: 95% claimed accuracy
Best For: High-accuracy requirements
Saleshandy emphasizes data quality and accuracy over sheer volume.
Key Features:
- 95% data accuracy claims
- Cost-effective pricing
- Email verification tools
- CRM integrations
Pricing: Transparent monthly pricing
Strong alternative for accuracy-focused teams.
GrowMeOrganic – The Unlimited Option
Database Size: Growing database
Data Accuracy: Real-time verification
Best For: Teams wanting unlimited access
GrowMeOrganic offers unlimited credits for a flat monthly fee.
Key Features:
- Unlimited credit model
- Email finding tools
- Outreach automation
- Flat monthly pricing
Pricing: Unlimited access pricing model
Snov.io – The Multi-Feature Platform
Database Size: 220M+ contacts
Data Accuracy: Variable by region
Best For: Multi-channel outreach
Snov.io combines data with outreach automation tools.
Key Features:
- Email finder and verifier
- LinkedIn automation
- CRM integrations
- Multi-channel sequences
Pricing: Freemium model with paid upgrades
Woodpecker.co – The Email Specialist
Database Size: Partner integrations
Data Accuracy: Depends on data source
Best For: Cold email automation
Woodpecker focuses on email automation rather than data collection.
Key Features:
- Advanced email automation
- Deliverability optimization
- Integration with data providers
- Detailed analytics
Pricing: Email automation focused pricing
Wiza.co – The LinkedIn Extractor
Database Size: LinkedIn-based extraction
Data Accuracy: Variable, LinkedIn dependent
Best For: LinkedIn Sales Navigator users
Wiza specializes in extracting data from LinkedIn Sales Navigator.
Key Features:
- LinkedIn Sales Navigator integration
- Bulk email extraction
- Contact enrichment
- Export capabilities
Pricing: Credit-based pricing for extractions
Which B2B Data Provider is the Best?
The “best” data provider depends entirely on your specific needs, budget, and sales motion. Here’s how to choose:
For Cold Email Teams
Choose Salesso. It’s built specifically for email accuracy and deliverability, with built-in warmup tools and sequence automation.
For All-in-One Solutions
Choose Apollo.io. It offers the best combination of database size, features, and transparent pricing for most businesses.
For Maximum Accuracy
Choose UpLead. Their 95% accuracy guarantee and real-time verification eliminate wasted time on bad data.
For European Markets
Choose Cognism. Their GDPR compliance and verified mobile numbers are unmatched for EU prospecting.
For Enterprise Teams
Choose ZoomInfo. Despite the high cost, it offers the most comprehensive data and advanced features for large organizations.
For LinkedIn-First Teams
Choose Lusha or Kaspr. Both offer excellent LinkedIn integration with different pricing models.
For Budget-Conscious Teams
Choose Kaspr. The free plan and affordable upgrade options provide excellent value.
Key Decision Factors:
Budget: Credit-based systems (UpLead, Lusha) offer flexibility but can have unpredictable costs. Unlimited models (Cognism, ZoomInfo) provide predictability but require larger upfront investment.
Geography: US-focused teams have the most options. European teams should prioritize GDPR-compliant providers like Cognism or Lead411.
Sales Motion: High-volume outbound needs different tools than targeted account-based selling.
Team Size: Solo practitioners have different needs than enterprise sales teams.
Integration Requirements: Consider your existing CRM and sales engagement platform compatibility.
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B2B Data Providers: FAQs
What is a B2B data provider?
A B2B data provider is a company that collects, verifies, and sells business contact information including email addresses, phone numbers, company details, and professional backgrounds. They help sales teams find and connect with potential customers.
How accurate is B2B data?
Data accuracy varies significantly by provider. Top providers like UpLead guarantee 95% accuracy, while others report user experiences as low as 50%. The industry average for B2B data decay is 22.5% annually, so real-time verification is crucial.
What’s the difference between credit-based and unlimited pricing?
Credit-based systems charge per contact accessed, offering flexibility but potentially unpredictable costs. Unlimited systems charge a flat fee for access to all data, providing cost predictability but requiring larger upfront investment.
Is LinkedIn Sales Navigator better than B2B data providers?
LinkedIn Sales Navigator excels at research and social selling but lacks contact data like email addresses and direct dial phone numbers. Most sales teams use both: LinkedIn for research and B2B data providers for contact information.
How do I choose between data providers?
Consider these factors: your budget, target geography, required data accuracy, team size, and integration needs. Start with free trials to test data quality in your specific market before committing to annual contracts.
What’s the best B2B data provider for cold email?
Salesso leads for cold email because it focuses specifically on email deliverability and includes warmup tools. Apollo.io and UpLead are also strong choices for email-focused campaigns.
Are B2B data providers GDPR compliant?
Compliance varies by provider. Cognism, Lusha, and Lead411 specifically emphasize GDPR compliance. Always verify compliance requirements for your target markets before choosing a provider.
How much do B2B data providers cost?
Pricing ranges from free plans (Apollo.io, Kaspr) to $25,000+ annually (Cognism, ZoomInfo). Most SMB-focused providers cost $50-200 per month. Enterprise solutions typically require custom pricing.
Can I integrate B2B data providers with my CRM?
Most major providers integrate with popular CRMs like Salesforce, HubSpot, and Pipedrive. Check integration capabilities before choosing, as seamless data flow is crucial for sales efficiency.
What’s the ROI of using a B2B data provider?
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B2B Data Providers: FAQs
What is a B2B data provider?
How accurate is B2B data?
What's the difference between credit-based and unlimited pricing?
Is LinkedIn Sales Navigator better than B2B data providers?
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