3rd Party Data Providers: 11 B2B Sources Compared (2026)

To see third-party data work on your own targets, give the contact finder a name and a company. It asks 25+ providers in sequence until one returns a deliverable address and verifies it before you get it, inside a free Cleanlist AI workspace.

First, second and third-party data: what is the difference?

The four types differ by who collected the data and whether that collector knows the person it describes.

Most B2B teams use all four. First-party data tells you who your best customers are, and third-party data finds more companies and people like them. The quality question is always the same: where did the provider get it, and when was it last checked?

How third-party B2B data is collected

Providers describe their own sources, and the descriptions vary a lot. Here are four, read on each provider's page on November 10, 2026:

• Publisher co-ops. Bombora builds its intent data from a co-op of what it calls thousands of publishers, brand sites and premium data providers, and says 86% of the co-op's data is shared only with Bombora.
• Registries and filings. FactSet says its private company data is built from imputed tax financials, local registries, SEC filings and collected deal and fund data. Our private company data providers comparison covers FactSet and seven others.
• Second and third-party data points combined. HG Insights says its datasets come from over 20 billion second and third-party data points.
• Other providers. Some companies resell or combine data from many providers. Cleanlist AI does this: it owns no database, and each record is assembled from provider partners when you ask for it. The providers it contracts with are listed on its data sources page.

11 third-party data providers and marketplaces for B2B

Prices and counts come from each vendor's own page, read on November 10, 2026. Counts are each vendor's own figures, and we have not audited them.

1. ZoomInfo: best for contacts, companies and signals from one vendor

ZoomInfo says it holds verified data on 500M+ contacts and 100M+ companies and processes 1.5B+ data points a day. Its FAQ also says it processes professional contact data under the GDPR's legitimate interest basis. The pricing page prints no price: every plan leads to a "Get Pricing" form or a demo, though some plans offer a free trial. Our ZoomInfo pricing guide collects what buyers report paying.

Best for: larger teams that want contacts, company data and buying signals from one vendor, on an annual contract.

2. Dun & Bradstreet: best for company records and corporate families

Dun & Bradstreet says it has data on over 600M organizations in over 250 markets, and it issues the D-U-N-S Number, its ID for a business. For sales teams, D&B Hoovers Essentials costs $49 a month for 150 company credits and 150 contact credits, or $529 a year for 1,800 of each, and the first month is free. Our Dun and Bradstreet pricing guide covers D&B's other products and what buyers report paying for them.

Best for: teams that need clean company records, parent and subsidiary links, or credit data alongside contacts.

3. Cleanlist AI (our product): best for buying from many providers through one account

Disclosure. We make Cleanlist AI. Its 98% verified email and 85% direct dial figures come from our own 500-lead benchmark, which named no other vendor.

Cleanlist AI is a buyer of third-party data, organized so you do not have to be one. It runs waterfall enrichment across 25+ data providers in sequence and stops at the first deliverable result, at 1 credit per verified work email and 10 per phone number, and a miss costs nothing. Searching 1B+ profiles in People Search costs 0 credits. It owns no database: each record is assembled from provider partners when you ask for it, and each email is verified at that moment.

4. Apollo.io: best for a database with sequencing built in

Apollo says it has 240M+ contacts and 30M+ accounts. Its Free plan includes 900 credits a seat a year, Basic is $49 a seat a month billed annually with 30,000 credits a seat a year, and Professional is $79 with 48,000. Credits reset each billing cycle and do not roll over. Apollo also bundles sequences, a US dialer and website visitor identification. Our Apollo pricing guide breaks down the credit costs.

Best for: small teams that want data and sending in one low-cost tool.

5. Cognism: best for European contact data

Cognism prices on request, on two plans called Standard and Pro, each with 5 seats, and one credit reveals one contact. Pro adds on-demand mobile verification. Its compliance page says it collects and shares data under the GDPR's legitimate interest basis, notifies business contacts that they are in its database, and screens phone data against 15 do-not-call lists, including the UK's TPS and CTPS. Our Cognism review covers the rest, and our UK B2B data providers guide compares it with eight other options for the UK and Europe.

Best for: teams selling into the UK and Europe who call mobile numbers.

6. Bombora: best for B2B intent data

Bombora sells intent data about companies. Its Company Surge product shows which companies are researching a topic, which Bombora says reflects research across 14B+ events a month and 5M company domains, across 25,300+ intent topics. Bombora delivers the data into CRMs, marketing automation and ad platforms, and names partners including Salesforce, HubSpot, Adobe, Apollo, The Trade Desk, Google Ads, LinkedIn and Meta Ads. It publishes no price, and our Bombora pricing guide covers what buyers pay. Our intent data providers comparison covers the category.

Best for: marketing and sales teams that want to time outreach to accounts showing research activity.

7. HG Insights: best for technographic and IT spend data

HG Insights sells data on the technology companies use and what they spend on it, plus buyer intent. It says its datasets cover market, account, spend, technology installs and buyers, sourced from over 20 billion second and third-party data points, and it lists a partnership with Bombora. It publishes no price. The technographic data glossary entry explains the data type.

Best for: companies that sell software or IT services and target accounts by the tools they run.

8. Datarade: best for finding a niche dataset

Datarade is a data marketplace that lists other companies' data. It says it lists 2,700+ data providers across 560+ data categories, lets buyers compare samples and pricing, and charges buyers nothing, because providers pay Datarade when a purchase is made. Use it when you need something specific, such as company data for one country or one industry, and want several quotes.

Best for: data teams sourcing a dataset they cannot get from a sales tool.

9. Snowflake Marketplace: best if your data team works in Snowflake

Snowflake Marketplace says it connects buyers to over 820 providers and more than 3,400 data products, agents and apps. Snowflake says the data stays inside your own governance, with no need to move it out, and in select regions some purchases can draw on part of your existing Snowflake spend. The marketplace page lists no prices.

Best for: companies with a data warehouse on Snowflake that want third-party data next to first-party data.

10. AWS Data Exchange: best if your data team works in AWS

AWS Data Exchange says it offers over 3,500 third-party data sets from over 300 providers, delivered as files, tables or APIs, and that over 1,000 of them are free. Its data set listings open on AWS Marketplace.

Best for: teams that build models or products on AWS and want data delivered there.

11. Databar: best for many providers through one subscription and an API

Databar sells one subscription to 100+ data providers, with spreadsheet-style enrichment tables, waterfall enrichment, an API and an MCP server. Its homepage counts 160+ live sources. The Free plan includes 150 credits, Build is $99 a month for 5,000 credits, and Scale is $495 a month for 50,000. You can also bring your own API keys for providers you already pay.

Best for: operations teams that want to mix many data sources in one table and automate it.

What do "B2B data partners" and "B2B data exchange" mean?

B2B data partners are companies that license data to each other or deliver it inside each other's products. Bombora's intent data reaches buyers through partner platforms, and HG Insights lists Bombora as a partner. Cleanlist AI's provider partners supply the records its waterfall assembles, and its data sources page names the ones it contracts with.

B2B data exchange has two meanings. In sales and marketing, it is a marketplace where providers list datasets and buyers subscribe, as on AWS Data Exchange or Snowflake Marketplace. In IT, it means sending orders, invoices and shipping notices between companies' systems, often called EDI, which is a different market. This page covers the first meaning.

B2B data marketplace usually means the first kind of exchange: Datarade, Snowflake Marketplace and AWS Data Exchange sell other companies' data, while Databar and Cleanlist AI combine many providers behind one account.

How do you choose a third-party data provider?

1. Name the job first. Contacts for outbound, company records for sizing a market, intent for timing, technographics for targeting. Each job has a different best provider.
2. Ask where the data came from. The European Commission says that before you acquire a contact list from another organization, that organization must be able to show it collected the data in line with the GDPR and that it may be used for advertising (read November 10, 2026). Ask the same question of any provider, in any country.
3. Test it on your own records. Run 100 contacts you already know through each finalist and count matches, verified results and wrong titles. Our B2B data providers guide sets out that test and the cost math step by step.
4. Read the license. Check what you may keep after you cancel, how many seats can export, and whether unused credits expire. Apollo's credits, for example, do not roll over, while Cleanlist AI's unused credits do.
5. Plan the refresh. People change jobs, so a record bought today needs checking again before each campaign.

See pricing

What our tests found when we compared providers

We have published three tests. All three are first-party, so read them as our own evidence, with the method linked.

• The 1,000-lead test, March 2026, with no Cleanlist AI arm. ZoomInfo returned a verified email for 84% of leads against Apollo's 78%, and a mobile number for 67% against 41%. The method is in Apollo vs ZoomInfo.
• The 100-lead test. The same list through the Cleanlist AI waterfall and through Apollo alone returned 98% verified email and 85% phone for the waterfall, against roughly 80% and 45% for Apollo.
• The 500-lead benchmark. Cleanlist AI returned 98% verified work emails and 85% phone numbers on the Cleanlist AI 500-Lead Enrichment Benchmark, our own test run on a 500-lead sample, against 70 to 80% email and 30 to 60% phone for single-source databases. The benchmark write-up publishes the protocol.

What the three share: providers differ in what they cover, and in our tests asking several in sequence found more than asking one.

Find verified contacts from 25+ providers in Cleanlist AI, step by step

1. Pick the accounts. In Company Search, filter by industry, employee count, location and funding stage, at 0 credits.
2. Pick the people. Describe the buyer to Clu, Cleanlist AI's GTM agent, or set filters in People Search. Searching costs 0 credits.
3. Run the waterfall. Each person goes through 25+ providers until one returns a deliverable result: 1 credit for a verified work email, 10 for a phone number, nothing for a miss.
4. Start from a name. For one person, the contact finder or the email finder takes a name and a company. For a file, upload the CSV.
5. Sync it. On Pro, enriched records write to HubSpot or Salesforce. From Starter, people can go into a Cleanlist AI sequence that sends from your own inbox.

What it costs: every new workspace starts with a 14-day Pro trial with up to 3 seats and 250 credits, plus 100 more when you register with a work email, and a card is required. After that, Starter is $49 a seat a month with 750 credits a seat, Pro is $89 with 1,500, and the Free plan keeps 50 credits a month.

Frequently asked questions

Is third-party data the same as third-party cookies?

No. A third-party cookie is a browser mechanism that tracks people across websites, mostly to build ad audiences. B2B third-party data usually means records about companies and professionals, such as a work email, a job title or a company's headcount, that a provider licenses to you. Changes to cookies mainly affect ad audience data, and much less a contact database.

Is it legal to use third-party data for B2B outreach?

Generally yes, within each country's rules. In the US, the FTC says CAN-SPAM makes no exception for business email, so every message needs an opt-out you honor within 10 business days. In the EU and UK, you need a lawful basis, must tell people where you got their data, and must stop when they object. Our business lead lists guide covers each regulator's rules, and none of this is legal advice.

What is the difference between a data provider and a data broker?

The words overlap. "Data broker" usually means a company that collects and sells personal data about people it has no direct relationship with, and some US states require such companies to register. Lead411, for example, says on its site that it is a registered data broker under state laws, including Texas law (read November 10, 2026). Ask any US provider whether it is registered where the law requires it.

What is a B2B data co-op?

A co-op is a group of companies that pool data in exchange for access to the combined result. Bombora's intent data comes from a co-op of publishers, brand sites and data providers that share data with it. Co-ops give providers data no single company could gather, and they depend on members keeping their consent and notices in order.

How much does third-party B2B data cost?

From nothing to large annual contracts. AWS Data Exchange lists over 1,000 free data sets and Apollo has a free plan, while ZoomInfo, Cognism, Bombora and HG Insights publish no prices at all. Compare providers on the cost of each record you accept after testing, and our B2B data pricing index compares published prices across the category.