Apollo vs ZoomInfo vs Cognism vs FullEnrich Compared

The Quick Comparison

Before diving into each tool, here's the summary table. Everything below is based on our usage and publicly available information as of early 2026.

Now let's break each one down.

Apollo ($49/user/mo)

Apollo has become the default recommendation for B2B teams that want prospecting, enrichment, and outreach in one platform without spending five figures. The product has matured significantly over the past two years.

We used Apollo extensively during Uptoo's 60K company enrichment project. For companies headquartered in the US, the match rate sat around 78%. For French companies, it dropped to about 61%.

What Apollo does well. Over 200 search filters let you build very specific audiences: companies using a particular tech stack, recently funded, in a specific revenue range. The built-in email sequencer is competitive with standalone tools like Outreach or Salesloft for teams under 20 reps. AI-generated email drafts save time, though they still need editing.

The free tier gives you 10K email credits per month, basic search, and limited sequence features. At $49/user/month (Basic), you unlock 25K credits, advanced filters, and A/B testing. The Organization plan at $149/user/month adds international data, call recording, and workflow automation.

Email accuracy. We measured it across three projects. On US tech companies over 50 employees, Apollo's email accuracy was around 93%. On European SMBs, it dropped to 89%. The overall average across our work: about 92%. Solid, though not best-in-class.

Where Apollo falls short. Phone data, especially for European markets. We pulled mobile numbers for 5,000 French decision-makers through Apollo. Only 34% had a phone number listed, and of those, roughly 1 in 5 were outdated. If cold calling into EU markets matters, you need Cognism or a waterfall approach on top.

The platform also gets messy past 15+ users. Managing permissions, sequence ownership, and sending limits requires attention that smaller teams don't need.

Bottom line. Apollo is the best value in the market for teams that want one platform for prospecting, enrichment, and outreach. The phone data gap in Europe is real, but for email-first teams selling primarily into the US, it's hard to justify paying 5x more for ZoomInfo.

ZoomInfo (~$15K/year minimum)

ZoomInfo is the incumbent. The largest database, the deepest firmographic data, the most integrations. It's also the most expensive by a wide margin and comes with contract practices that have earned a reputation.

We've worked with ZoomInfo on projects for enterprise clients with 50+ SDR teams. At that scale, the data depth genuinely matters. Org charts that show reporting structures. Intent data signaling which companies are actively researching topics related to your product. Website visitor identification. Technographic data showing what tools a company uses. No other platform in this comparison offers all of that in one place.

What ZoomInfo does well. The firmographic and technographic data is the deepest in the industry. If you need to know that a 500-person manufacturing company in Ohio is running SAP, has a VP of Procurement who reports to the CFO, and that company has been researching “supply chain automation” this quarter, ZoomInfo can tell you all of that. Nobody else can, at least not from a single provider.

The integration ecosystem is also the broadest. Native connections to Salesforce, HubSpot, Marketo, Outreach, Salesloft, Gong, and dozens more. ZoomInfo Engage, their outreach module, is functional but not why people buy the platform. The value is the data and the intent signals.

Email accuracy. The highest we've measured among these four. Across our projects, ZoomInfo emails bounced at about a 5% rate for US contacts. That puts accuracy around 95%. For large US-based companies, it's even better. The accuracy advantage shrinks for smaller companies, private businesses, and European contacts. For French SMBs under 50 employees, the bounce rate climbed to 12-14%.

Where ZoomInfo falls short. The minimum contract is roughly $15K/year, but that gets you limited credits and features. Most teams end up paying $25K-40K for a meaningful package. One client was quoted $62K for a 30-seat license with intent data and the full integration suite.

Annual contracts are the norm. Cancellation requires written notice 60-90 days before renewal. Multiple clients have told us about aggressive renewal tactics and price increases of 15-20% at renewal. If you sign with ZoomInfo, mark your cancellation window on the calendar immediately.

The accuracy advantage also fades outside the US. For European contacts at companies with fewer than 200 employees, we've found ZoomInfo's data quality comparable to Apollo's. You're paying a premium for US enterprise data depth, not global coverage.

Bottom line. ZoomInfo makes sense for enterprise sales teams with large budgets, complex tech stacks, and a primary focus on the US market. The intent data and org charts provide real competitive advantages at scale. For everyone else, the price tag is difficult to justify when Apollo covers 85% of the same use cases at a fraction of the cost.

Cognism (~$1K/user/year)

Cognism dominates a specific niche: European B2B data with GDPR compliance baked in from the ground up. If your team sells into EU markets and relies on phone outreach, Cognism wins among these four.

The standout feature is Diamond Data. Cognism employs a team that manually verifies mobile phone numbers by calling them. We tested it: out of 2,000 Diamond-verified French mobile numbers we pulled for a client, 1,961 connected to the right person. That's 98.05%. Compare that to Apollo's 34% match rate for the same geography.

What Cognism does well. GDPR compliance is not an afterthought at Cognism. They built the platform around it. Every record includes consent and compliance metadata. Their Do Not Call lists are integrated at the data level. For companies selling into Germany, France, the Nordics, or the UK, this matters. A single GDPR complaint can cost more than a year of Cognism licenses.

The Diamond Data program is genuinely unique. Nobody else in this comparison (or the broader market) offers human-verified mobile phone numbers at this scale. For sales teams where cold calling is a primary channel, the ROI calculation is simple: your connect rates go up because you're calling correct numbers.

Beyond phones, Cognism's email data is strong for European contacts. We measured about 93% accuracy across UK, French, and German companies, slightly better than Apollo for EU-specific enrichment.

Where Cognism falls short. The US database is smaller than Apollo's or ZoomInfo's. We've had projects where Cognism returned enrichment data on 55% of US contacts while Apollo hit 78% on the same list. The outreach features feel secondary. Most Cognism users pair it with a separate outreach platform.

Pricing at roughly $1K per user per year lands between Apollo and ZoomInfo. Fair for European phone data, but US-only teams would overpay for a database that doesn't match the competitors' breadth.

Bottom line. Cognism is the right choice for any team where EU phone outreach is a meaningful part of the sales motion. Diamond Data is a real product advantage with no equivalent on the market. For everything else, it's a solid but not exceptional enrichment tool.

FullEnrich ($29/mo)

FullEnrich takes a fundamentally different approach. Instead of building its own proprietary database, it aggregates results from 20+ enrichment providers through a waterfall model. You submit a contact or company, and FullEnrich queries multiple sources sequentially until it finds the data you need.

We started using FullEnrich as a fallback. When Apollo didn't find an email for a contact, we'd run that contact through FullEnrich. The incremental hit rate surprised us. On a batch of 3,200 contacts that Apollo couldn't enrich, FullEnrich found valid emails for 2,100 of them. That's a 65% recovery rate on records that would have been dead ends.

What FullEnrich does well. Coverage. The waterfall approach means you're not dependent on any single provider's database. If Dropcontact doesn't have the email, maybe Hunter does. If Hunter doesn't, maybe Snov.io does. FullEnrich tries them all and returns the best result.

At $29/month for the starter plan, the pricing is almost absurdly low compared to the alternatives. You get 1,000 enrichment credits per month. The Growth plan at $59/month bumps that to 5,000 credits. Even the Enterprise tier at $199/month is cheaper than a single Apollo seat with comparable credit volumes.

For phone numbers, the waterfall approach also works well. FullEnrich pulls from multiple phone data providers, which gives it decent EU coverage without Cognism's price point. Not Diamond Data quality, but meaningfully better than Apollo's phone data for European contacts.

Where FullEnrich falls short. There's no database to browse. You can't search for “VP Marketing at SaaS companies in Germany with 50-200 employees” the way you can with Apollo or ZoomInfo. FullEnrich only enriches records you already have. It's an enrichment tool, not a prospecting tool. No outreach features either. No sequences, no email sending, no call tracking.

Accuracy varies because results depend on which provider in the waterfall returned them. Across our projects, email accuracy ranged from 85% to 90%, lower than Apollo or ZoomInfo's averages. Data freshness is also harder to predict. The tradeoff is coverage: you get more results, but each result carries slightly more risk of being outdated.

Bottom line. FullEnrich is the best enrichment layer for teams on a budget and the ideal complement to any primary enrichment tool. We use it as a second pass on every project. If you already have a list and just need to fill in missing emails and phone numbers, $29/month for 20+ provider coverage is remarkable.

Head-to-Head on What Matters

Comparison tables are useful, but enrichment tools live or die on specific dimensions that matter differently depending on your situation. Here's how the four stack up on each one.

Accuracy (Email)

Ranking: ZoomInfo > Cognism > Apollo > FullEnrich (variable)

ZoomInfo's 95% accuracy leads the group, but the gap narrows significantly outside the US. For European contacts, Cognism's 93% effectively ties with ZoomInfo's EU-specific performance. Apollo's 92% is close enough that the accuracy delta alone doesn't justify a 5x price increase over Apollo.

FullEnrich's accuracy is the hardest to pin down because it depends on which source in the waterfall returned the result. We've seen batches where accuracy was 91% and batches where it was 84%. The variance is the issue more than the average.

One nuance that matters: accuracy depends heavily on company size and geography. All four tools perform best on companies with 50+ employees headquartered in the US. Accuracy degrades for everyone as you move to smaller companies, newer companies, and non-English-speaking markets.

Phone Coverage (EU)

Ranking: Cognism >>> ZoomInfo > FullEnrich > Apollo

This is the widest gap in the entire comparison. Cognism's Diamond Data makes it categorically different for EU phone outreach. A 98% accuracy rate on verified mobile numbers is not in the same conversation as Apollo's ~34% match rate with questionable accuracy.

ZoomInfo's phone data for EU contacts is moderate. Better than Apollo, but nowhere near Cognism's verified numbers. We found about 52% coverage on French decision-makers through ZoomInfo, with roughly 80% accuracy on the numbers that existed.

FullEnrich's waterfall approach lands in between, pulling from multiple phone providers to achieve decent coverage without the human verification step that makes Cognism's data exceptional.

If cold calling in Europe is a core part of your go-to-market, Cognism is not optional. Everything else is a compromise.

Pricing at Scale

Ranking (cheapest to most expensive): FullEnrich > Apollo > Cognism > ZoomInfo

The pricing gap widens dramatically as you add users. Here's what a 20-person sales team would pay annually:

• FullEnrich: $3,480/year (Growth plan, shared credits)
• Apollo: $11,760/year (Basic, 20 users at $49/user/mo)
• Cognism: ~$20,000/year (20 users at ~$1K/user/yr)
• ZoomInfo: $30,000-60,000/year (depending on package and negotiation)

At 20 users, ZoomInfo can cost 5-10x what Apollo costs and 10-17x what FullEnrich costs. That math only works if the data quality difference directly translates into enough additional closed deals to justify the spend.

For most teams under 50 people, it doesn't. The accuracy difference between Apollo at 92% and ZoomInfo at 95% means roughly 3 additional valid emails per 100 lookups. At average B2B conversion rates, that's not moving the needle enough to justify a $40K annual price increase.

CRM Integration

Ranking: Apollo (deepest native integration) > ZoomInfo (broadest ecosystem) > Cognism > FullEnrich

All four integrate with HubSpot and Salesforce. The quality of those integrations varies.

Apollo's HubSpot integration is the most seamless we've used. Bi-directional sync, enrichment triggers, sequence enrollment from the CRM. It feels native rather than third-party. ZoomInfo's ecosystem is broader but individual integrations require more configuration. Cognism's integrations are functional and reliable.

FullEnrich relies on API connections and Zapier for most integrations. More setup work, but also more flexibility. We typically connect FullEnrich through n8n workflows that run enrichment on new CRM records automatically.

One important note: always clean your data before enriching. Enriching a messy database means layering good data on top of bad records.

GDPR Compliance

Ranking: Cognism > Apollo/ZoomInfo > FullEnrich (depends on sources)

Cognism was built in the UK to address European data privacy requirements. Every record includes compliance metadata, consent tracking, and Do Not Call list integration. Apollo and ZoomInfo offer GDPR-compliant features, but compliance is an add-on to platforms originally designed for the US market.

FullEnrich is the most complex from a GDPR perspective. Data comes from 20+ providers, and the compliance posture of any given record depends on which provider supplied it. If your legal team is conservative about data sourcing, this ambiguity is a problem.

Our Verdict: Who Should Pick What?

After running enrichment through all four platforms across dozens of projects, here's what we actually recommend to clients.

Startup, under 50 people, US-focused: Apollo

Apollo gives you prospecting, enrichment, and outreach at $49/user/month. The free tier lets you validate before committing budget. Built-in sequences save you from buying a separate Outreach or Salesloft license. Add FullEnrich as a $29/month fallback for contacts Apollo misses.

Selling into Europe: Cognism + FullEnrich

If phone outreach in EU markets is part of your sales motion, start with Cognism. Diamond Data is not a nice-to-have. It's a category-defining feature that will measurably improve your connect rates.

Layer FullEnrich underneath for contacts where Cognism doesn't have data. The waterfall approach recovers a meaningful percentage of records that any single provider misses. Together, the combination covers EU markets better than any single tool.

Enterprise, 50+ SDRs, US-focused: ZoomInfo

At enterprise scale, ZoomInfo's data depth earns its price tag. Org charts, intent data, technographic data all create compounding advantages for large, structured sales organizations. At 50+ users, the per-user cost spreads enough to make the ROI work. Negotiate hard on the initial contract. Get a 60-day cancellation notice clause in writing.

Maximum coverage on a budget: FullEnrich

If you already have lists and just need to find emails and phone numbers, FullEnrich's $29/month for 20+ provider waterfall is the best value in the market. You won't get prospecting or outreach features. You won't get a searchable database. But for pure enrichment output per dollar spent, nothing comes close.

We use FullEnrich on every single enrichment project as a second pass. The incremental coverage it provides is too valuable to skip.

Complex orchestration: none of these alone

If you need workflows that combine multiple providers with conditional logic, you need an orchestration layer. Clay is the current leader for no-code enrichment workflows. n8n is our choice for clients who want more control and lower costs at scale.

The pattern that works best: a primary enrichment tool (Apollo or Cognism depending on geography) feeding into Clay or n8n with FullEnrich as the waterfall fallback, all syncing to a clean CRM.