Apollo vs ZoomInfo vs Cognism: B2B Data Compared

If you're building a B2B outbound motion, you'll eventually need a contact data platform. And when you start looking, three names come up constantly: Apollo, ZoomInfo, and Cognism.

All three sell access to business contact data — emails, phone numbers, company information, job titles. But they're built for different teams, at different price points, with different strengths. Picking the wrong one costs you months of frustration and potentially thousands in wasted spend.

We've used or evaluated all three in our own lead generation work and spoken with dozens of teams who rely on them daily. This comparison is based on real experience, not feature-list copying. We'll cover what each tool actually does well, where it falls short, and who should use it.

A quick note: none of these tools are paying us for this comparison. We have no affiliate arrangement with any of them. Totalremoto operates in the lead generation space, so we have genuine opinions based on hands-on usage.

Quick Overview of Each Tool

Apollo.io is the generalist's choice. It combines a B2B contact database with a built-in email sequencing engine, a basic CRM, and a Chrome extension for LinkedIn prospecting. Apollo's value proposition is doing a lot of things in one platform at a price point that startups and small teams can afford. It's particularly popular with early-stage companies and solo founders who need a data-plus-outreach tool without paying enterprise prices.

ZoomInfo is the enterprise standard. It's the largest B2B data provider by market share and has been around (under various names) since 2000. ZoomInfo's database is enormous — over 100 million business profiles — and its data enrichment, intent data, and integration capabilities are the deepest in the market. It's built for revenue teams at mid-market and enterprise companies that need reliable, comprehensive data across their entire tech stack.

Cognism is the European contender. Founded in London, Cognism has built its reputation on GDPR compliance, phone-verified mobile numbers, and strong European data coverage. While Apollo and ZoomInfo are US-headquartered with US-first databases, Cognism has invested heavily in European and APAC data quality. It's the go-to choice for companies that sell into the UK and EU and need data they can legally use under European privacy regulations.

Feature Comparison

Here's where the three platforms differ most meaningfully.

Database size and coverage. ZoomInfo has the largest database overall, with particularly deep coverage in North America. Their company and contact records number in the hundreds of millions, and they've been accumulating data for over two decades. Apollo's database is smaller but still substantial — they claim over 270 million contacts. The data skews toward tech, SaaS, and startup ecosystems because that's where Apollo's user base lives. Cognism's database is smaller than both, but its European coverage is arguably the best of the three. If your target market is UK, Germany, France, or the Nordics, Cognism's data quality in those regions often surpasses ZoomInfo and Apollo.

Contact data quality. This is where things get nuanced. Database size doesn't equal data quality. ZoomInfo invests heavily in data verification through a combination of AI, web scraping, and their community contribution model (where users of their free tools contribute data in exchange for access). The result is generally high accuracy for US contacts, though European data can be patchier. Apollo's data quality is more variable — some records are excellent, others are outdated. Because Apollo's pricing is lower, there's an implicit trade-off: you get more data for less money, but you'll need to verify more of it. Cognism differentiates with "Diamond Data" — phone-verified mobile numbers that their research team has manually confirmed. If you need mobile numbers for cold calling in Europe, Cognism is genuinely the best option.

Built-in outreach tools. Apollo is the only platform of the three that includes a full email sequencing engine as a core feature. You can build prospect lists and immediately launch email sequences from within Apollo — no integration required. This makes Apollo a genuine all-in-one tool for small teams. ZoomInfo offers outreach capabilities through its Engage product, but it's an add-on, and many teams still pair ZoomInfo with a separate outreach tool like Outreach.io or Salesloft. Cognism is primarily a data platform; it integrates with outreach tools but doesn't try to replace them.

Intent data. ZoomInfo offers intent data through its acquisition of Bombora's competitor technology and its own first-party signals. Their intent data is built into the platform and can trigger alerts, power automated workflows, and enrich CRM records. Apollo has added basic intent data features, but they're relatively new and less sophisticated than ZoomInfo's offering. Cognism offers Bombora intent data as an add-on, giving you access to topic-level research signals for your target accounts.

CRM and integrations. All three integrate with Salesforce, HubSpot, and other major CRMs. ZoomInfo's integrations are the deepest and most mature, reflecting its enterprise focus. Apollo includes a built-in lightweight CRM that works for small teams but isn't a replacement for Salesforce or HubSpot at scale. Cognism's integrations are solid and focused — they push data into your existing CRM rather than trying to replace it.

Chrome extension and LinkedIn integration. All three offer Chrome extensions for prospecting on LinkedIn. Apollo's extension is widely regarded as the most user-friendly for individual prospecting — you can find contact details and add prospects to sequences directly from LinkedIn profiles. ZoomInfo's extension is powerful but more suited to structured prospecting workflows. Cognism's extension is well-designed and emphasises compliance by showing whether a contact can be legally reached under GDPR.

Pricing Comparison

Pricing is one of the biggest differentiators, and it's where Apollo's value proposition becomes most obvious.

Apollo offers a genuine free tier with limited credits and features. Paid plans start around $49/month per user for the Basic plan and scale to $99–$119/month per user for Professional and Organization tiers. Annual billing reduces these costs further. For a small team of 2–3 people, you're looking at roughly $200–$400/month total. That's remarkably affordable for a data-plus-outreach platform.

ZoomInfo doesn't publish pricing, which tells you something about the price point. Based on widely reported figures and our own conversations, ZoomInfo typically starts around $15,000–$25,000/year for a small team, and enterprise contracts can easily reach $50,000–$100,000+ annually. There are minimum seat requirements and annual contracts. ZoomInfo's pricing reflects its enterprise positioning — it's designed for companies that generate enough revenue from the data to justify the investment.

Cognism also doesn't publish standard pricing, but it's generally positioned between Apollo and ZoomInfo. Expect annual contracts starting around $15,000–$30,000/year for a small team, with pricing that scales based on the number of users, data credits, and add-ons like intent data. Cognism's pricing is competitive with ZoomInfo for European-focused teams, especially when you factor in the GDPR compliance value.

The pricing gap is enormous. A team that pays $3,000/year for Apollo would pay $15,000–$25,000 for comparable ZoomInfo access. That 5–8x difference determines which tool makes sense for your business stage.

Data Quality and Compliance

Data quality and compliance are often discussed together, but they're actually separate concerns. Let's address both.

Email accuracy. In our experience, ZoomInfo's email accuracy is the highest of the three for US contacts — typically 85–92% verified. Apollo's accuracy is more variable, ranging from 75–88% depending on the segment. Cognism's email accuracy is strong for European contacts but less consistent for US data. All three provide confidence scores or verification indicators, so you can filter for higher-quality records before exporting.

Phone number quality. This is where Cognism shines. Their Diamond Data phone numbers are manually verified by a research team, resulting in connection rates significantly higher than Apollo or ZoomInfo's phone data. If cold calling is part of your outbound strategy and you're targeting European prospects, Cognism's phone data is genuinely worth the premium. ZoomInfo's phone data is good in the US but less reliable internationally. Apollo's phone data exists but isn't a strength of the platform.

GDPR and privacy compliance. This matters increasingly for any company doing outbound in Europe, the UK, or with prospects who have European data rights. Cognism was built with GDPR compliance as a core design principle. They maintain a Do Not Call database, check consent status, and provide compliance tools within the platform. ZoomInfo has improved its GDPR posture significantly in recent years — they operate a European data centre and offer compliance features — but their roots are in the US market where privacy expectations are different. Apollo's compliance tooling is the least developed; the platform is usable for European outreach, but the compliance burden falls more heavily on the user.

Data freshness. B2B data decays fast — people change jobs, companies merge, email addresses expire. ZoomInfo's data refresh rate is generally the fastest, thanks to their scale and multiple data sources. Apollo refreshes data regularly but can have stale records, particularly for smaller companies or non-tech industries. Cognism's refresh rate is competitive, with their verification team continuously updating records.

Who Each Is Best For

Choose Apollo if: you're a startup, small team, or solo founder who needs a combined data and outreach platform at an affordable price. Apollo is the best value in B2B data for teams with modest budgets. It's also excellent for teams that want to prospect on LinkedIn, build lists, and send email sequences from a single tool. If your primary market is the US tech ecosystem and you can tolerate some data quality variability in exchange for massive cost savings, Apollo is the smart choice.

Choose ZoomInfo if: you're a mid-market or enterprise company with a dedicated revenue operations team that needs the deepest data, the most integrations, and enterprise-grade intent data. ZoomInfo makes sense when the data is feeding a sophisticated sales engine — Salesforce workflows, Outreach sequences, ABM campaigns — and the deal sizes justify the investment. If you're closing $50K+ deals and your pipeline depends on data quality, ZoomInfo's premium is justified.

Choose Cognism if: your target market includes the UK, EU, or other regions where GDPR compliance is mandatory. Cognism is also the right choice if cold calling is a core part of your outbound strategy and you need verified mobile numbers. For European-focused B2B teams, Cognism offers a combination of data quality, compliance, and phone verification that neither Apollo nor ZoomInfo can match.

There's no universal winner. A 5-person SaaS startup selling to US mid-market would be well-served by Apollo. A 200-person software company selling globally needs ZoomInfo. A 30-person agency selling to UK financial services needs Cognism. The right tool depends entirely on your market, budget, and outreach strategy.

What About Intent-Based Alternatives?

All three platforms offer some form of intent data, but they're fundamentally contact databases with intent layered on top. There's another approach entirely: starting with intent signals and working backwards to the contacts.

The difference matters. When you start with a database, you're still doing cold outreach — just with better contact information. You're reaching people who match your ICP on paper but may have zero interest in buying right now. When you start with intent signals, you're reaching people who are actively researching solutions like yours. The conversations are warmer because the timing is right.

For a deeper explanation of how intent signals work in practice, read our guide on what intent signals are and how they're used in B2B.

Totalremoto takes this intent-first approach. Rather than giving you a database to prospect from, we monitor buying signals across the web and reach out to companies showing genuine interest in your category. You get warm meetings rather than a spreadsheet of contacts. It's a different model from Apollo, ZoomInfo, and Cognism — not better in every situation, but often more effective when you prioritise meeting quality over data volume.

That said, data platforms and intent-based services aren't mutually exclusive. Many teams use Apollo or ZoomInfo for broad prospecting while running intent-based campaigns for their highest-priority segments. The best approach often combines both.

Frequently Asked Questions

Can I use Apollo and ZoomInfo together?

Yes, some teams do this. They use Apollo for day-to-day prospecting and email sequencing (because it's affordable and has built-in outreach), while using ZoomInfo for strategic account research and high-value prospect verification. It's not the most cost-efficient approach, but it can work if your budget allows it and your team can manage two data sources without creating duplicates.

How accurate are the email addresses in each platform?

No platform guarantees 100% accuracy. In practice, ZoomInfo's emails are the most consistently accurate in the US (85–92% verified). Apollo's accuracy ranges from 75–88% depending on the segment. Cognism's email accuracy is strong for European contacts. All three provide verification indicators — always use them and consider running exports through a third-party verification tool like ZeroBounce or NeverBounce before sending outreach.

Is Apollo's free tier actually useful?

Surprisingly, yes. Apollo's free tier includes limited search credits, basic email finding, and access to the Chrome extension. It's enough for an individual founder or freelancer to do basic prospecting. You'll hit limits quickly if you're running serious campaigns, but it's a legitimate way to evaluate the platform before committing to a paid plan.

Do I need Cognism if I'm only targeting US prospects?

Probably not. Cognism's core advantages — GDPR compliance and verified European mobile numbers — are less relevant for US-only outreach. Apollo or ZoomInfo would typically be better choices for exclusively US-focused teams. That said, if your strategy relies heavily on cold calling and you want the best phone data available, Cognism's Diamond Data may still be worth evaluating.

Which platform has the best intent data?

ZoomInfo's intent data is the most deeply integrated and sophisticated of the three. It combines Bidstream data with ZoomInfo's own first-party signals and can trigger automated workflows within the platform. Cognism offers Bombora's intent data as an add-on, which is solid but requires more manual activation. Apollo's intent features are the newest and least developed. If intent data is a primary buying criterion, ZoomInfo leads — but consider whether a dedicated intent-based service like Totalremoto's intent-driven lead generation might deliver more actionable results than platform-embedded intent scores.

How long do contracts typically last?

Apollo offers monthly billing, making it the most flexible. ZoomInfo and Cognism both typically require annual contracts, though some negotiate shorter terms. ZoomInfo in particular is known for aggressive annual contract requirements — be prepared for that conversation and negotiate hard if you want flexibility. Always clarify auto-renewal terms before signing.