B2B data providers.

A B2B data provider sells business contact and company data — names, titles, emails, phone numbers, firmographics, technographics, and intent signals — so you can build prospect lists or enrich the records you already have. ZoomInfo, Apollo, and Cognism are the three most used. The right one depends on your region, your budget, and whether you need raw volume or verified accuracy.

Most people pick a provider by asking "who has the most contacts?"

Wrong question.

The database with 500 million records doesn't help you if 40% of them bounce, or if you're selling in Germany and they only cover North America well.

I run ContactLevel, so read this knowing I have a horse in part of this race. But ContactLevel isn't a database. It's an enrichment and activation layer. I'll be honest about where the actual databases win and where we don't compete at all.

This guide covers how to choose a B2B data provider, what each major one is good at, the Apollo vs ZoomInfo question everyone asks, and the red flags that tell you a vendor is selling you stale data.

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How to choose a B2B data provider.

Before you look at a single logo, get clear on four things. Most buyers skip this and end up paying for coverage they don't need.

The four data types.

Not all "data" is the same thing. Providers mix these, but they're good at different ones.

→ Contact data — names, job titles, work emails, direct-dial and mobile numbers. The stuff you need to actually reach a human.

→ Firmographic data — company size, revenue, industry, location, headcount. The stuff you filter on to build a target account list.

→ Technographic data — what software a company runs. Useful if your pitch depends on their stack ("you use Salesforce, here's how we plug in").

→ Intent data — signals that an account is researching your category right now. This is the priciest layer and the one most often oversold. I wrote a full breakdown of B2B intent data if you want to go deep.

If you only need to enrich a list of people you already have, you mostly care about contact data. You don't need to pay for an intent add-on you'll never look at.

Coverage.

Coverage is where most decisions actually get made, and it's two questions.

Geography first. A provider that's excellent in the US can be thin in EMEA or APAC. If half your pipeline is European, North-American-heavy databases will quietly fail you.

Then depth. A record with a name and a generic info@ email is not the same as a record with a verified mobile and a personal email. Ask for a sample export of your actual ICP, not the demo they want to show you.

Compliance.

In B2B you can't ignore this anymore.

GDPR, CCPA, and the patchwork of US state laws all govern how contact data gets collected and used. Some providers build on legitimate interest with documented assessments. Others are vague about where the data came from.

If you're selling into Europe, this isn't optional. It's the whole game.

Activation.

Here's the part almost every "best data providers" listicle ignores.

Buying data is step one. Using it is step ten.

A list of 10,000 contacts sitting in a CSV does nothing. You have to load it into outreach, sync it to a CRM, and — if you run paid — match it to ad platforms so those people actually see your content.

That last step is where most databases fall apart. A raw CSV upload matches 20-50% of your list on LinkedIn or Meta, because your CRM stores business emails and people register on ad platforms with personal ones. So even with great data, most of your list never sees the ad.

That gap is the entire reason ContactLevel exists. More on that below.

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The B2B data provider guide.

Here's the honest rundown. I've used or evaluated most of these. Numbers are from each vendor's own published claims and recent third-party reviews — sourced inline, because data-provider stats go stale fast.

ZoomInfo.

The 800-pound gorilla. ZoomInfo claims 321M+ contact profiles and 104M+ company profiles as of 2026, plus the largest direct-dial phone database and Bombora-powered intent signals (source).

It's the most complete platform and the most expensive. ZoomInfo doesn't publish pricing — entry contracts start around $15,000/year and most mid-market teams land at $25,000-$50,000 once they add seats and intent, with the intent add-on reported to run several thousand to tens of thousands of dollars a year on top (source).

Pick it if you're enterprise, you need the deepest phone coverage and intent, and the budget exists.

Apollo.

The challenger that ate a lot of ZoomInfo's lunch on price. Apollo reports 270M+ contacts and 70M+ companies, with a genuine free tier and per-seat pricing around $49-$99/month (source).

What makes Apollo different: it bundles the database with email sequencing and a dialer. So you prospect, enrich, and run outreach in one tool. For a startup or a small sales team, that's a strong package.

The tradeoff is accuracy. Independent comparisons put Apollo's data quality a notch below ZoomInfo's, especially on phones (source).

Cognism.

The one to know if you sell in Europe.

Cognism is built around GDPR compliance — it operates on a legitimate-interest basis with documented assessments and checks against DNC lists (source). Its Diamond Data product is phone-verified mobile numbers, where a human confirms the number reaches the named person before it enters the database (source).

If your reps live on the phone and your market is EMEA, Cognism's connect rates are hard to beat. US-only teams won't feel the difference as much.

Clearbit (now Breeze Intelligence).

Heads up: Clearbit doesn't exist as a standalone product anymore.

HubSpot acquired it in late 2023 and rebranded it Breeze Intelligence in September 2024. The free tools were sunset, and it's now a HubSpot add-on for firmographic and technographic enrichment plus visitor identification (source).

If you're already a HubSpot shop, Breeze is a natural enrichment layer. If you're not, this isn't your entry point — you can't buy it on its own anymore.

Lusha.

Lighter and more self-serve. Lusha leans freemium, has decent international and European coverage, and works well as a browser extension for reps pulling contacts off LinkedIn one at a time.

It's a good fit for smaller teams or anyone who wants to test before committing budget. It's not the tool for building a 50,000-contact target list in bulk.

UpLead.

UpLead's pitch is accuracy over volume. 160M+ contacts with a 95% data accuracy guarantee, and every email verified in real time before you spend a credit — if it doesn't verify, you don't get charged (source).

Coverage skews North American. If you're US-focused and tired of bounce rates, the pay-only-for-verified model is a clean way to control quality.

Buyerfeeds.

The provider for a data type the databases above barely touch: person-level intent.

Most intent data stops at the account. You learn that "someone at Acme" is researching your category and then guess who. Buyerfeeds resolves the signal to the actual people. You search any topic on the open web and get back a feed of the named contacts researching it, with their companies attached — not an anonymous account surge score.

No data co-op to feed (unlike Bombora). No six-figure enterprise contract. It's self-serve, with a dashboard for marketers and an API for builders. Buyerfeeds is ContactLevel's sister company — same founders — and our own team runs it against our CRM to add intent signals to leads, so I'm telling you this as a user, not just a co-founder.

It's a data layer, not an ABM suite. It won't score accounts or orchestrate a campaign for you. What it does is answer "who is in-market right now, by name?" — then you hand that feed to your CRM, your sequencer, or to ContactLevel for ads. More on that pairing in the intent data providers and contact-level intent data breakdowns.

ContactLevel.

Now the honest part about where I fit.

ContactLevel is not a database. I don't sell you a list of strangers to cold-email. If you have zero contacts, you need one of the providers above first.

What ContactLevel does is take a list you already have — from your CRM, an event, a webinar, or your website visitors — and enrich it through an identity graph, adding 50-70 data points per contact versus the 1-3 in a typical CSV. Then it syncs that enriched list to LinkedIn, Meta, Google, Reddit, and X at 70-99% match rates, versus the ~30% you get from a native CSV upload.

So the people on your list actually see your ads. That's the contact-level data enrichment job, and it's a different job than the databases do.

Think of it this way: ZoomInfo and Apollo fill your list. Buyerfeeds tells you which people on it are in-market right now. ContactLevel makes that list usable for advertising. You often need more than one of these.

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Apollo vs ZoomInfo.

This is the comparison everyone searches, so let me be direct about it.

These two are not really the same product, even though they compete for the same buyers.

The short version:

Apollo wins on price and on being one tool. You get the database plus sequencing plus a dialer, with a free tier to start. For a founder-led sales team or an SMB, that bundle is the reason to pick it (source).

ZoomInfo wins on data depth and accuracy. Independent testing gives it the edge on contact accuracy and direct-dial coverage, and its intent data is the strongest in the category. You pay enterprise prices for it (source).

My take: if you're early and cost-sensitive, start with Apollo. If you're an enterprise running real ABM where bad data costs you six-figure deals, ZoomInfo's accuracy premium is usually worth it. And if you're between the two on price, look at Cognism or UpLead before you assume those are your only options.

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Red flags when evaluating a B2B data provider.

I've sat through a lot of these demos. Here's what tells me a vendor is hiding something.

They won't give you a sample of your ICP. Every provider will show you a polished demo. Few will export 100 records matching your actual target and let you check the bounce rate. If they dodge that, the data is worse than the pitch.

They quote a database size and nothing else. "500 million contacts" means nothing if half are stale. B2B data decays at roughly 2-3% a month as people change jobs. A smaller, fresher database beats a huge rotting one.

They're vague about data sourcing. If a rep can't tell you where the data comes from and what legal basis they collect it under, walk. That's a compliance liability, not a deal.

They lock you into an annual contract before a trial. The good providers let you test. The ones demanding 12 months upfront before you've validated a single export are protecting themselves, not you.

They sell you account-level intent as a magic button. "Someone at Acme googled something adjacent three weeks ago" is weaker than it sounds — you still have to guess who. That's why Buyerfeeds resolves intent to named people instead, and why I wrote about contact-level intent data being the better signal. If a provider charges a premium for an anonymous account score, you're paying for noise.

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Where data fits in your acquisition system.

Buying data is not a strategy. It's an input.

The sequence that actually works: define who you're going after, build or source the list, enrich it so it's usable, then activate it across outreach and ads.

Step one is your ideal customer profile. Get that wrong and the best database in the world just helps you reach the wrong people faster.

Then comes the list. A provider fills it if you're starting cold. Your CRM, events, and site traffic fill it if you're not.

Then enrichment, so the records are complete enough to use. Then activation — and that's the part where a database alone leaves you stuck at a 30% match rate.

If your goal is to get content in front of the specific people on your list, not just email them, that's contact-level advertising. The data is the fuel. The targeting is the engine. You need both, and they're rarely the same vendor.

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Go deeper.

→ Contact-level marketing — the full system: source a list, enrich it, and reach every person on it across five ad platforms.

→ Contact-level data enrichment — how the identity graph turns a thin CSV into 50-70 data points per contact.

→ Contact-level targeting — why match rates are so low and how enrichment pushes them to 70-99%.

→ Intent data providers — how the intent layer compares, and where person-level feeds like Buyerfeeds fit.

→ Ideal customer profile (B2B) — define who you're targeting before you buy a single record.

→ ZoomInfo alternatives — where ZoomInfo fits and what to use instead when the budget doesn't.