# Best B2B data API: ranked by live price

The best B2B data API depends on what you start from. From a domain, the cheapest price per call wins, and this page ranks the looot catalog providers by that live price. From an email, a name or a social profile, pick the provider whose endpoint takes it. Your agent calls any of them with one key.

## Live prices

Prices read on 2026-10-13 from the live looot catalog. They change when a provider changes its price.

Cheapest today for enrich a company from its domain or name: The Companies API at $0.0019 per call.

| Rank | Provider | Price per call | Per 1,000 calls |
|---|---|---|---|
| 1 | The Companies API (thecompaniesapi) | $0.0019 per call | $1.90 |
| 2 | Hunter (hunter) | $0.0049 per call | $4.90 |
| 3 | Tomba (tomba) | $0.0089 per call | $8.90 |
| 4 | CompanyEnrich (companyenrich) | $0.0098 per call | $9.80 |
| 5 | PredictLeads (predictleads) | $0.0100 per call | $10.00 |
| 6 | LeadMagic (leadmagic) | $0.0198 per call | $19.80 |
| 7 | Datagma (datagma) | $0.03266 per call | $32.66 |
| 8 | Prospeo (prospeo) | $0.0390 per call | $39.00 |
| 9 | Coresignal (coresignal) | $0.1960 per call | $196.00 |

## Providers

- thecompaniesapi: Its endpoints take an email, a company name or a social profile such as LinkedIn or GitHub. The email lookup returns the company behind the address's domain, with name, industry, employees and locations. The name lookup returns every company whose name matches, so check the match. Also: Company search, Similar companies, Email pattern.
- hunter: Takes a domain. Returns the company name, description, industry category, company type, founded year, location, email provider, funding rounds and social profiles. The catalog description lists no headcount. Also: Email finder, Domain search, Email verifier.
- tomba: Takes a domain. Returns the company name, legal name, industry codes, founded year, location, the phone numbers and email addresses listed on its site, and its social profiles. Also: Technographics, Email finder, Phone finder.
- companyenrich: Has one endpoint by domain and one by properties such as name, LinkedIn URL or other social URLs. The domain lookup returns a 404 when the company is not stored yet, then schedules the enrichment for a later call. Also: Lookalike companies, Company search, People search.
- predictleads: Takes a domain or its own company id. The basic endpoint returns only the company name, domain, description and language. An extended endpoint returns more firmographic fields. Also: Technographics, Funding, Company news, Job postings search.
- leadmagic: Takes a domain, a company name or a LinkedIn URL. Returns the description, industry, employee count and range, headquarters, competitors and growth figures. The charge follows the credits it consumes, which is zero when nothing is found. Also: Email finder, Phone finder, People search.
- datagma: Takes a domain or a company LinkedIn URL. Returns the name, industry, size, location, technologies, employees and a premium firmographics block. Also: Funding, Tech stack, Job changes.
- prospeo: Takes a website, a name or a LinkedIn URL. Returns the name, domain, industry, employee count and range, founded year, location, keywords, technologies and headquarters phone. Also: Company search, People search, Person enrichment.
- coresignal: Takes a website only. Returns a deduplicated company record, and a second endpoint returns a record merged from several sources. Also: Company search, People search, Job postings search.

## How we rank

Every provider here has a company enrichment endpoint in the looot catalog that is billed per call.

We rank by the cheapest per-call price among a provider's company enrichment endpoints, read live from the catalog. A cheaper call ranks higher.

Some providers bill company enrichment per result, not per call. They are in the catalog and are not ranked on this page, because a result and a call are different units.

The catalog does not publish a measured success rate for these endpoints, so this page does not rank by one and quotes none.

Extras are other capabilities the provider has in the catalog. More extras does not mean better data.

Providers outside the looot catalog are not ranked.

## Choosing one

- You have an email address, a company name or a social profile, not a domain: thecompaniesapi
- Domain in, funding rounds and social profiles out: hunter
- Industry codes plus the phone numbers and emails on the company site: tomba
- Lookup by name or LinkedIn URL, and lookalike companies: companyenrich
- Company data next to news, funding and job postings: predictleads

## Prompt

Use looot to enrich the company domains in my list: for each domain call the cheapest company enrichment endpoint that takes a domain, show name, industry, size and location in a table, and tell me the total cost. 1. Set up https://looot.ai/skill.md. 2. Search the catalog for each step and check its price before you call. 3. Run the cheapest endpoint that fits. 4. Show the results as a table and the total cost.

## What is the best B2B data API?

It depends on what you start from and what you need back. This page ranks the looot catalog providers by live price per call for company enrichment. Pick the cheapest for bulk lookups from a domain, or the provider whose endpoint takes your input and returns your fields.

## What is the cheapest B2B data API?

The first row of the ranking above, read live from the catalog. Prices can change, so the page reads them on each refresh and shows no number when the catalog is unreachable.

## What is a B2B data API?

A service your code or agent calls to get facts about companies, such as name, industry, size, location, funding and social profiles, as structured data. The fields depend on the provider.

## Is there a free B2B data API?

This page ranks priced endpoints, so it lists no free one. One catalog note worth knowing is that CompanyEnrich's lookup by domain returns a 404 without a charge when the company is not stored yet.

## What are the best ZoomInfo alternatives?

ZoomInfo is not in the looot catalog, so this page does not rank it. The providers above enrich a company from a domain, a name or a social profile, and your agent can call any of them with one key.

## Which B2B data provider has the best data?

Each B2B data provider here keeps its own company database, and the catalog names the provider on every endpoint. Coresignal also has an endpoint that returns a record merged from several sources. Compare the fields in the ranking, then run one lookup on your own list to see the data.

## Where do I get B2B email data?

Company enrichment returns company facts, not an email list. Hunter, Tomba and LeadMagic also have an email finder endpoint, shown as extras in the ranking. Tomba's company endpoint also returns the email addresses listed on the company's own site.

## How does an agent call a B2B data API?

Paste the prompt on this page into your agent. It sets up looot, finds the company enrichment endpoints, checks the price and runs the cheapest one that takes your input.

## What can I enrich a company from?

It depends on the endpoint. Hunter and Tomba take a domain. TheCompaniesAPI takes an email, a name or a social profile. LeadMagic and Prospeo take a domain or name, and LinkedIn URLs work with several of them. Check the endpoint's inputs in the catalog first.

## Can I refresh the company data every week?

Re-running a lookup by hand works today. Refreshing on a timer needs scheduled runs, not available yet.

## Why does this page not rank providers billed per result?

A per-result price and a per-call price are different units, so ranking them in one list would mislead. Those providers are in the catalog, and the catalog shows the price of each endpoint before you run it.

## Why does this page not show success rates?

The catalog does not publish a measured success rate for these endpoints. We would rather rank by a number we can read than quote one we cannot.

## Related pages

- /best/linkedin-api
- /best/serp-api
- /best/news-api
- /best/tiktok-api
- /best/reddit-api
- /use-cases/enrich-a-company
- /use-cases/data-enrichment
- /recipes/enrich-a-company-list
- /recipes/ceo-emails-for-fintechs

## Last reviewed

2026-10-13. The ranking by price per call is read live from the catalog on the web page.

## Agent skill for this page

https://looot.ai/best/b2b-data-api/skill.md sets an agent up for exactly the jobs on this page, with the live price of each, and offers the page's starter task once the user has picked a job and seen the price. The line to give an agent is under "Give this to your agent" below.

## For agents

### Give this to your agent

```text
set up looot for Best B2B data API - https://looot.ai/best/b2b-data-api/skill.md
```