Apollo vs ZoomInfo: An Honest Comparison After Using Both

We signed a ZoomInfo contract in early 2023 for $32,000/year. Two seats. Standard data package plus intent signals. For 18 months it was the center of our outbound motion. Then the renewal quote came in at $38,000 and we started looking around.

Apollo offered roughly the same seat count for $5,400/year. We switched.

This isn't a story about how Apollo is better than ZoomInfo. It's about what actually changed when we moved. Some things got better. Some got worse. Some didn't change at all. I'll share the numbers we tracked so you can figure out which matters for your team.

Data Accuracy: The 500-Contact Test

We took 500 contacts that we'd been prospecting through ZoomInfo and ran them through Apollo. Then we spot-checked 100 contacts manually. Called the phone numbers. Sent test emails. Verified titles against LinkedIn.

Email accuracy. ZoomInfo: 92% deliverable. Apollo: 88% deliverable. That 4-point gap sounds small until you're sending 10,000 emails a month. At that volume it's 400 extra bounces, which is enough to hurt your sender reputation with some ESPs.

Phone numbers. This is where ZoomInfo pulls ahead hard. ZoomInfo returned direct dials for 61% of our 500 contacts. Apollo returned them for 43%. And the ZoomInfo numbers were more current. We reached a live person 34% of the time on ZoomInfo numbers versus 22% on Apollo numbers. If your team does cold calling, this gap matters.

Title accuracy. ZoomInfo got current titles right 89% of the time. Apollo hit 84%. The misses were mostly people who had changed roles in the last 3-6 months. ZoomInfo seems to pick up job changes faster, probably because of their data partnership network.

Company data. Roughly equal. Both provide revenue estimates, employee counts, industry classifications, and tech stack data. ZoomInfo's company profiles felt slightly more detailed for large enterprises (1,000+ employees). Apollo's were better for startups and mid-market companies, probably because their user base skews that direction and contributes more data at that tier.

Pricing: The Obvious Difference

Let's be direct about this. ZoomInfo costs 5-8x what Apollo costs for comparable access.

Our ZoomInfo contract: $32,000/year for 2 power users, 10,000 annual export credits, intent data, and basic integrations. Renewal was quoted at $38,000. We negotiated it down to $34,000 but by then we'd already started the Apollo trial.

Our Apollo setup: $5,400/year for 2 seats on the Professional plan. Includes 24,000 annual export credits, enrichment, sequences, and API access. Adding the Organization plan for better API limits and more credits brought us to $9,600/year. Still less than a third of ZoomInfo.

There's a catch. ZoomInfo includes intent data in most packages. Apollo doesn't have intent data at all. If you're using ZoomInfo's Scoops or intent signals to time your outreach, switching to Apollo means losing that capability entirely. We'll get to whether that matters.

Search and Filtering

Apollo's search interface is genuinely good. 65+ filters, Boolean logic, saved searches, and a UI that doesn't make you want to close the tab. The technology filter is particularly useful. Want companies running Salesforce and HubSpot but not Marketo? Apollo handles that cleanly.

ZoomInfo's search is more powerful for complex org-chart based queries. Want to find everyone who reports to the VP of Sales at companies with 500+ employees? ZoomInfo does that. Apollo doesn't really do hierarchical searches.

ZoomInfo's intent data adds another search dimension that Apollo can't match. You can filter for companies actively researching topics related to your product. We used this to build "in-market" lists and the conversion rates were genuinely 2-3x our standard lists. Losing this was the biggest downside of switching.

For day-to-day prospecting where you're building lists based on title, industry, company size, and technographics, the two are comparable. Apollo's filters are a bit more intuitive. ZoomInfo's are a bit more comprehensive.

API Access

This is where Apollo wins and it's not close.

Apollo's API is available on paid plans starting at $49/month. Documentation is clear. Rate limits are reasonable. You can search contacts, enrich records, manage lists, and pull company data programmatically.

ZoomInfo's API requires an enterprise contract. We're talking $50K+ territory. For our mid-market team, API access was theoretically included in our $32K package but with severe rate limits and a setup process that involved three calls with their "solutions engineering" team.

When we started building AI agent workflows around our sales data, Apollo's API was the enabling factor. An Apollo Company Research agent can hit Apollo's API, pull company details, cross-reference with other data sources, and compile a research brief in minutes. We tried building the same thing on ZoomInfo's API and gave up after two weeks of fighting their authentication flow and undocumented rate limits.

If you're planning to build any kind of automation around your sales intelligence data, Apollo's API accessibility is worth the trade-off in data coverage.

What ZoomInfo Does That Apollo Can't

Intent data. Full stop. ZoomInfo's integration with Bombora and their own first-party intent signals let you see which companies are actively researching topics relevant to your product. We tracked this for six months before switching. Companies flagged with high intent converted to meetings at 8.3% versus 3.1% for non-intent leads. That's a real difference.

Apollo has no intent data product. There's no setting or add-on that fills this gap. If intent signals are a meaningful part of your outbound strategy, you either keep ZoomInfo or you buy intent data separately from Bombora or G2.

Org charts. ZoomInfo maps reporting structures. You can see who reports to whom, which matters for multi-threaded enterprise deals. Apollo gives you contacts at a company. ZoomInfo gives you the organizational structure.

Data coverage at the enterprise level. For Fortune 1000 companies, ZoomInfo's contact database is deeper. More direct dials, more verified emails, more accurate titles. The gap narrows for mid-market and flips for smaller companies where Apollo's coverage is actually better.

What Apollo Does That ZoomInfo Can't

Built-in sequences. Apollo includes email sequencing in all paid plans. You can go from search to list to email sequence without leaving the platform. ZoomInfo requires a separate tool (Salesloft, Outreach, etc.) for actual outreach.

Affordable API access. Already covered this, but it's worth repeating. The ability to programmatically access your sales intelligence data without an enterprise contract changes what you can build.

Community-contributed data. Apollo's database gets supplemented by its user base. When a salesperson verifies a contact or updates information, it feeds back into the system. This makes Apollo's data weirdly good for companies and roles that salespeople interact with frequently (heads of sales, VPs of marketing, founders) and weaker for roles nobody prospects into.

Transparent pricing. You can see Apollo's prices on their website. You can sign up without talking to a human. This matters if you're a 5-person sales team that doesn't want to sit through a demo and negotiate a contract just to get access to contact data.

The Real Winner: Using Either Through Agents

Here's what surprised us most. After six months on Apollo, our outbound performance was within 10% of where it had been on ZoomInfo. The data was a little less accurate, yes. The phone numbers were worse, yes. But the cost savings let us send more volume, which offset the quality gap.

Then we layered AI agents on top of Apollo's API and performance went past where ZoomInfo had been.

Kenji on our team built a workflow where an agent runs a targeted Apollo search, enriches every result, deduplicates against our CRM, researches each company using multiple sources (not just Apollo), and outputs a ranked list with custom notes per contact. The agent compensates for Apollo's data gaps by pulling from additional sources. The total data quality ends up comparable to ZoomInfo, sometimes better because the agent checks more sources than any single tool contains.

The cost: Apollo subscription plus agent compute time. Maybe $12,000/year total. Versus $34,000 for ZoomInfo used manually through their UI.

The real comparison isn't Apollo versus ZoomInfo. It's "expensive data used through a point-and-click interface" versus "cheaper data used through automated workflows that add intelligence on top." The second approach wins even when the underlying data is less comprehensive.

Integration and Workflow Differences

This part doesn't get enough attention. Both tools integrate with Salesforce and HubSpot. Both have Chrome extensions. Both offer CSV export. On paper the integration story looks identical.

In practice, ZoomInfo's integrations are more mature. Their Salesforce sync is bidirectional and handles custom objects. Their workflow automation triggers are more granular. You can set up rules like "when a contact changes jobs, update the CRM record and notify the account owner." Apollo's integrations work but they feel one generation behind. The Salesforce sync is solid for pushing contacts but less reliable for pulling CRM data back into Apollo.

Where Apollo wins on integrations: Zapier and webhook support is straightforward and well-documented. If you're building custom workflows through no-code tools or AI agents, Apollo plays nicely. ZoomInfo's API documentation is dense and their webhook system requires more configuration to get running.

Anya on our team spent two days setting up a ZoomInfo webhook integration that auto-enriched inbound leads. The same workflow on Apollo took her four hours. The ZoomInfo version was more robust once it was running, but the setup cost was painful.

For teams that are going to customize their workflows heavily (which is most teams once they realize they can), Apollo's openness matters more than ZoomInfo's native feature depth.

Which One Should You Pick

If your team does heavy cold calling into enterprise accounts and you have the budget, ZoomInfo's phone data and intent signals are worth it. Keep it.

If your team is primarily email-based, targets mid-market companies, and wants API access without an enterprise contract, Apollo gives you 80-90% of ZoomInfo's value at 20-30% of the cost.

If you're building automated prospecting workflows with AI agents, Apollo is the obvious choice. The API access alone justifies the switch.

We don't regret moving to Apollo. We saved $24,000/year. We lost some data quality. We more than made up for it by automating workflows that were manual on ZoomInfo. Your math might be different, but do the math. Don't just renew the contract because it's what you've always used.

Try These Agents

• Apollo Company Research — Pull detailed company profiles from Apollo and compile multi-source research briefs
• Apollo Prospect List Builder — Build filtered prospect lists from Apollo and export to Sheets
• Apollo Bulk Enrichment — Enrich large contact lists through Apollo's API automatically
• AI Sales Prospecting Agent — Full pipeline from ICP definition through qualified, enriched prospect lists