When it comes to B2B contact and company data, two platforms dominate the conversation: ZoomInfo and Apollo.io. ZoomInfo is the established enterprise leader with premium pricing, while Apollo has disrupted the market with aggressive pricing and an all-in-one approach. Here is a detailed comparison to help you choose.
Platform Overview
ZoomInfo
ZoomInfo is the market leader in B2B data and intelligence. Founded in 2000 (originally DiscoverOrg), it offers the largest and most established B2B database along with advanced intent data, workflow automation, and enterprise-grade features. It is the go-to choice for mid-market and enterprise sales teams.
Apollo.io
Apollo.io launched in 2015 as a more accessible alternative to ZoomInfo. It combines a substantial B2B database with built-in sales engagement tools (email sequencing, dialer, workflow automation). Apollo has gained massive traction, particularly among startups, SMBs, and cost-conscious teams.
Data Quality and Coverage
ZoomInfo Data
- Database size: 300+ million professional profiles, 100+ million companies
- Email accuracy: Industry-leading, typically 90-95% accuracy
- Phone numbers: Extensive direct dial coverage, considered best-in-class
- Data freshness: Continuous updates with human-verified records
- Technographic data: Detailed technology stack information
- Org charts: Visual organizational hierarchies
- Intent data: Proprietary Bidstream and first-party intent signals
Apollo.io Data
- Database size: 270+ million contacts, 60+ million companies
- Email accuracy: Generally 85-90% accuracy
- Phone numbers: Available but less comprehensive than ZoomInfo
- Data freshness: Regular updates, community-contributed data
- Technographic data: Available through integrations
- Intent data: Recently added, growing capabilities
- Job change data: Alerts when prospects change roles
Pro Tip: ZoomInfo's data quality edge is most noticeable in enterprise and mid-market segments. For SMB prospecting, Apollo's data is often sufficient and considerably cheaper.
Features Comparison
ZoomInfo Exclusive Features
- Advanced intent data: Multiple intent data sources for buying signal detection
- Conversation intelligence: Call recording and analysis (ZoomInfo Chorus)
- Website visitor identification: See which companies visit your website
- FormComplete: Auto-fill forms with ZoomInfo data
- Advanced workflows: Sophisticated automation triggers
- Compliance tools: Built-in compliance for GDPR, CCPA
- Enterprise security: SOC 2 Type II, advanced access controls
Apollo.io Features
- Built-in email sequencing with multi-step campaigns
- Integrated dialer for cold calling
- LinkedIn extension for on-platform prospecting
- A/B testing for email campaigns
- Deal management with basic CRM functionality
- Meeting scheduling integration
- Lead scoring based on engagement and fit
Feature Overlap
Both platforms offer:
- Contact and company search with advanced filters
- CRM integration (Salesforce, HubSpot)
- Chrome extension for prospecting
- API access
- List building and export
- Team collaboration features
Pricing: The Biggest Difference
ZoomInfo Pricing
- No public pricing -- requires a sales conversation
- Typical starting price: $15,000-$25,000 per year for a basic plan
- Mid-tier plans: $25,000-$50,000 per year
- Enterprise plans: $50,000-$100,000+ per year
- Annual contracts required with limited flexibility
- Credit-based usage with overage charges
Apollo.io Pricing
- Free plan: 50 email credits per month
- Basic: Around $49/month per user
- Professional: Around $99/month per user
- Organization: Custom pricing, still significantly less than ZoomInfo
- Monthly billing available with flexibility to scale
- Generous credit allotments at each tier
The pricing gap is significant. A team of 5 SDRs might spend $6,000 per year on Apollo versus $30,000-$50,000 on ZoomInfo.
Best Use Cases
Choose ZoomInfo When:
- You are a mid-market or enterprise company with budget for premium data
- Data accuracy at the highest level is non-negotiable
- You need advanced intent data to prioritize accounts
- You require enterprise-grade security and compliance features
- Your team already has sales engagement tools (Outreach, Salesloft)
- You need direct dial phone numbers for executive-level outreach
- You want website visitor identification and conversation intelligence
Choose Apollo.io When:
- You are a startup or SMB with a limited budget
- You want an all-in-one platform (data + engagement)
- You are building your sales tech stack from scratch
- Your team values flexibility and month-to-month billing
- Email-based outreach is your primary channel
- You need a fast, self-service setup without a lengthy sales process
- Good data quality is acceptable (versus best-in-class)
Migration Considerations
Moving from ZoomInfo to Apollo
Many companies consider this switch to reduce costs:
- Data quality trade-off: You will lose some data accuracy, particularly for direct dials
- Feature gaps: No website visitor ID, limited intent data
- Savings: Typically 60-80% cost reduction
- Engagement upside: Built-in sequencing eliminates need for a separate tool
Moving from Apollo to ZoomInfo
Companies scaling up sometimes make this move:
- Data quality upgrade: Noticeably better email and phone accuracy
- Intent data: Significant advantage for account prioritization
- Enterprise features: Better suited for large, complex sales organizations
- Cost increase: Substantial budget impact that must be justified by results
Our Recommendation
After helping 100+ clients configure their prospecting tech stacks:
- For startups and SMBs (under $5M revenue): Apollo.io provides the best value. The data is good enough, and the built-in engagement tools eliminate the need for additional software.
- For mid-market companies ($5M-$100M): It depends on your sales motion. If you are doing high-volume outbound, Apollo may still be sufficient. If you are targeting enterprise accounts with complex buying committees, ZoomInfo's data quality justifies the investment.
- For enterprise companies ($100M+): ZoomInfo is the standard for a reason. The data quality, intent signals, and enterprise features are worth the premium.
Conclusion
ZoomInfo and Apollo.io serve different segments of the market. ZoomInfo offers premium data quality and advanced features at a premium price. Apollo.io provides strong value with good data and built-in engagement tools at a fraction of the cost. Your choice should align with your budget, team size, and sales complexity.
Prospect Engine helps B2B companies across 20+ countries build effective prospecting systems using the right tools. Whether you choose ZoomInfo, Apollo, or a combination, we can help you maximize your results. [Contact us](/contact) for a personalized tech stack recommendation.