How to choose a B2B data provider How to choose a B2B data provider

What does a B2B data provider do?

A B2B data provider sells access to records about people and companies. A typical record holds a name, job title, work email, phone number and company facts such as industry and headcount. You reach it through a web app, a browser extension, exports, an API or a CRM sync.

Common sources include public web pages, partner files, contact data shared by users of the provider’s tools and addresses built from email patterns. The mix affects accuracy, coverage and your legal position, so ask about it.

What should you check before choosing a B2B data provider?

How do you test coverage for your market?

Coverage is the share of the people you want that a provider actually has. A large total means little if your market is thin in it, so test with your own sample.

1. 1

   Build a test set

   Pick 50 to 100 people whose details you already know, across every region and company size you sell to.

2. 2

   Look up each person

   Search for the same people in every provider. Note whether it finds them, has a work email and, if you need one, a direct phone.

3. 3

   Check the answers

   Compare titles, employers and emails with what you know. A record showing last year’s job counts as a miss.

4. 4

   Test discovery

   Run your ideal customer filters and read the first 20 results by hand. Count how many you would actually contact.

5. 5

   Score each segment

   A provider can be strong in one region and thin in another, so score each segment.

How is B2B data accuracy measured?

Accuracy claims are hard to compare, because providers measure different things. Ask what the number describes, how it was measured and when.

• Accurate for what? A deliverable email, the person still in the role and a phone that connects are three different tests.
• Measured how? Ask for the sample size, the date and who ran the test.
• What does “verified” mean? Checked when collected, checked when you reveal it, or reviewed by a person? Ask which, and when.
• What about catch-all domains? Some mail servers accept any address, so no check can confirm the mailbox. Ask how those are labelled.
• What if data is wrong? Ask whether bounced or wrong contacts are refunded, and under what rules.

Then measure it yourself: send a small batch from the trial and count the hard bounces. Email bounce rate explains the calculation, and how to verify an email address covers what checks can prove.

How do B2B data providers price their data?

Most providers use one of four models, and many combine them. The model changes what a team of your size really pays.

Add up twelve months for your real team: seats, credits, add-ons and minimums. Divide by the usable contacts your test suggests you’ll get, and compare that figure.

What counts as a credit?

Two providers can both charge “one credit per contact” and cost very different amounts. Get the rules in writing:

• Which actions cost credits: viewing, revealing, exporting, enriching or calling the API.
• Whether a phone number costs more than an email.
• Whether a teammate opening the same contact pays again.
• Whether you pay when no email is found, or when the email is a pattern guess.
• Whether bounced or wrong contacts are refunded.
• Whether credits roll over, expire or reset each month.
• Whether credits belong to each user or sit in a shared pool.
• Whether you can see what each credit was spent on.

What should you check about data rights and compliance?

Buying access to data doesn’t hand your legal duties to the provider. The UK regulator, the ICO, says accepting a data broker’s assurances isn’t enough, so make your own checks.

• Where did the data come from? Directly from people, from public sources or from other companies?
• What were people told when their data was collected?
• How old is it, and when was each record last checked?
• Are opt-outs honored? Ask how people remove themselves, and whether objections reach customers who already hold the data.
• Is it registered? California requires data brokers, businesses selling data on people they have no direct relationship with, to register yearly.
• What does the license allow? Check what you may do with exported contacts, and whether you must delete them if you cancel.

Your own duties stay the same whatever the source. Under GDPR, the European Commission says third-party data must have been collected lawfully and cleared for marketing. Tell people by your first message at the latest, and stop if they object.

In California, the CCPA’s exemptions for business-to-business data expired at the end of 2022. Contacts there can ask a covered business what it holds, and ask for deletion.

Yahoo’s sender guidance tells senders not to purchase mailing lists. Treat a provider’s data as a starting point for research, not a list to mail in bulk.

Which integrations matter?

List the tools your team already uses, and check each connection on the plan you’d actually buy.

• CRM sync. Does it sync with your CRM without duplicates, one way or both? Ask to see it work with your own CRM.
• Browser extension. Useful for research on LinkedIn or company websites. Check what each lookup costs.
• CSV export. The fallback when there’s no sync. Check the row limit, the fields and the cost.
• API. Ask what it can do, its rate limits and which plans include it.
• Admin controls. Larger teams may need single sign-on, roles and spending limits. Check which tier has them.

How do you get the most from a trial or free plan?

1. 1

   Write the test first

   Decide what you’ll measure before you start: coverage on your sample, accuracy and bounce rate.

2. 2

   Use the same sample everywhere

   Run the same people through every provider you test, so the results compare fairly.

3. 3

   Test the daily workflow

   Have the people who will use it search, export and sync as they would at work.

4. 4

   Check how the trial ends

   Find out whether it turns into a paid plan automatically, what happens to your data and how to cancel.

Once you’ve chosen, build your prospect list in small segments, and check every address before the first send.

Last updated September 28, 2026