B2B Data Brokers Explained: ZoomInfo, Lusha, Apollo, Hunter.io

What B2B data brokers actually know about you, how they got it, and the fastest way to make them forget — for free.

Most privacy advice focuses on consumer data brokers — the Spokeos and Whitepages of the world that publish your home address. But the brokers that actually fuel cold outreach, recruiter spam, and unwanted sales calls are different. They're called B2B data brokers, and they're the reason your work cell rings every Tuesday at 10am.

Here's what they have, how they got it, and how to make them forget.

The big four

Broker	Data type	Database size	Primary buyers
ZoomInfo	Emails, direct dials, org charts	100M+ profiles	Enterprise sales teams
Lusha	Cell numbers, personal emails	100M+ profiles	SDRs, recruiters
Apollo.io	Emails, phones, intent data	275M+ profiles	Startups, SMB sales
Hunter.io	Work emails by domain	200M+ emails	Cold-email tools

How each one builds your profile

ZoomInfo

ZoomInfo's secret weapon is its community contributor program — sales teams that pay for ZoomInfo also upload their CRM contacts in exchange for credits. Your business card from three jobs ago is probably in someone's upload.

They also scrape LinkedIn, company websites, conference attendee lists, and email signatures from "free" Outlook/Gmail plugins.

Lusha

Lusha is a Chrome extension first, database second. When 1M+ sales reps install Lusha and browse LinkedIn all day, every profile they hover on gets enriched and added to the shared pool. It's distributed scraping disguised as a productivity tool.

Apollo.io

Apollo built its database on aggressive LinkedIn scraping (which got them sued, but the data is still there). They also pull from public web sources, GitHub, and patent filings to verify employment.

Hunter.io

Hunter takes a different approach: it crawls the public web for any string matching name@company.com patterns. Press releases, PDF documents, GitHub commits, blog comments — anywhere your work email has ever appeared, Hunter has indexed.

What buyers do with your data

A typical B2B database subscription is $10,000–$25,000/year. Buyers use it to:

Build cold-email lists targeting specific job titles
Cold-call decision-makers' direct dials
Pitch you on tools, services, recruiting opportunities
Enrich their CRM so every interaction has your title, phone, and email
Send LinkedIn InMails based on triggers (job change, funding round)

A single sales rep with a Lusha + Apollo subscription can generate 200+ outbound messages per day — and your contact info is the fuel.

Your legal rights

Under GDPR (Europe) and CCPA/CPRA (California), you have the right to:

Know what data is held about you
Delete that data
Opt out of the sale of that data

These rights apply globally to any broker that touches data of EU or California residents — which, in practice, is all of them. Most brokers comply because non-compliance brings 4% of global revenue in fines.

How to actually exercise those rights

You have two options:

Option 1: DIY (free, time-consuming)

File a removal request with each broker individually. We have detailed guides:

Budget: ~3 hours upfront, ~1 hour per quarter to re-check.

Option 2: UnlistMe.io (free, automated)

UnlistMe files removals with all four brokers (plus 20+ others), tracks responses, and re-files when your profile regenerates. Same legal mechanism, automated.

Unlike DeleteMe ($129/year) and Incogni ($77/year), there's no subscription. We built UnlistMe specifically because every paid service either misses B2B brokers entirely or charges money for opt-outs the law guarantees you for free.

The bigger picture

You can't stop B2B brokers from existing. You can keep your specific profile out of them — if you re-check regularly. The single highest-leverage privacy action you can take is removing yourself from the big four B2B brokers, then maintaining it.

Get started

Run a free UnlistMe scan. We'll show you which of the big four have your data, then remove you. Free, no credit card, no auto-renewal.