The defining B2B contact database debate — and which one fits your budget and buyer.
Apollo and ZoomInfo are the two names that come up in every B2B data conversation. Apollo has 275M contacts, a free tier, and an all-in-one platform starting at $49/month. ZoomInfo has 400M+ contacts, the deepest org chart coverage in the market, and enterprise pricing that starts around $15K/year. The gap is not just price — it is philosophy. Apollo built for self-serve teams that want data and sequencing in one place. ZoomInfo built for enterprise revenue orgs that need the most complete data available and will pay for it.
Data quality vs. data volume
Apollo claims 275M contacts, but flip on the "verified only" filter and that drops to roughly 96M. ZoomInfo's database is larger and generally more accurate on direct dials and mobile numbers. For common titles at mid-market companies, Apollo is good enough. For niche roles, C-suite direct dials, or deep org charts at enterprise accounts, ZoomInfo wins on data quality by a clear margin.
Pricing reality
Apollo's free tier gives you 10K export credits/year. Paid plans run $49-119/month per user. ZoomInfo starts at $15K/year for a small team and scales to $40K+ with add-ons. That is a 10-50x price difference depending on configuration. For a 5-person SDR team, Apollo might cost $7K/year. ZoomInfo would cost $20K-30K. The question is whether ZoomInfo's better data justifies that gap — and for many teams under $10M ARR, it does not.
Platform scope
Apollo bundles a sequencer, CRM-lite, and intent data into one product. You can prospect, enrich, and send emails without leaving the platform. ZoomInfo is primarily a data platform — sequencing requires separate tools or their add-on products (Engage, Chat). Apollo's all-in-one approach is faster to start. ZoomInfo's data-first approach is deeper but requires more tooling around it.
| Apollo | ZoomInfo | |
|---|---|---|
| Database size | 275M contacts (96M verified) | 400M+ contacts |
| Starting price | Free tier, $49/mo paid | $15K–40K+/year |
| Direct dial coverage | Decent for mid-market | Best in class |
| Org chart depth | Basic hierarchy | Deep org charts with reporting lines |
| Built-in sequencer | Yes — email + dialer | Separate product (Engage) |
| Intent data | Included on paid plans | Included, more granular |
| Data accuracy | Good — drops off for niche roles | Strongest in market |
| Best for | SMB/mid-market teams, sub-$10M ARR | Enterprise teams with budget for best data |
The verdict
Apollo for teams under $10M ARR that need a fast, affordable all-in-one prospecting tool. ZoomInfo for enterprise teams that need the most accurate direct dials, deep org charts, and are willing to pay 10-50x more for meaningfully better data. If you are a 5-person sales team debating between the two, start with Apollo. If you are a 50-person revenue org where a single enterprise deal covers the annual ZoomInfo cost, pay for ZoomInfo.
Is Apollo's data accurate enough for cold outbound?
For mid-market targets with standard titles (VP Sales, Director of Marketing), Apollo's verified emails are reliable. For niche roles, C-suite at large enterprises, or mobile numbers, accuracy drops. Always run email verification (BounceBan, ZeroBounce) before sending regardless of data source.
Can Apollo replace ZoomInfo for an enterprise sales team?
Partially. Apollo covers contact discovery and basic enrichment well. Where it falls short is org chart depth, direct dial accuracy for senior buyers, and the granularity of intent signals. Enterprise teams that rely on these signals typically outgrow Apollo within 12-18 months.
Why does Apollo's verified count drop so much?
Apollo's 275M includes contacts with varying confidence levels. The verified filter shows only contacts with high-confidence email data — around 96M. That is still a massive database, but the gap tells you that roughly two-thirds of their contacts have lower-confidence data.
Is ZoomInfo worth $15K+ per year?
If your average deal size is $50K+ and you close 2-3 deals per year from outbound, ZoomInfo pays for itself with one additional closed deal from better targeting. If your deals are $5K-10K, the math is harder to justify. Run the ROI calculation on your own deal economics.
No pitch deck. No 45-minute demo. A conversation about where your pipeline is stuck.