# Happierleads, free: Company discovery API

> Search the company database from your own code to build target lists.

Happierleads's company discovery API on its Free trial plan. It costs $0.00 per 1,000 companies. It returns 4 of the 13 key fields we check: Industry, Employees, Headquarters, Revenue and budgets.
You get 100 credits. You spend the credits on Happierleads's other calls. This call is free. Happierleads limits how many pages you get but gives no number.
We haven't run Happierleads through [our company discovery API benchmark](https://datacircle.dev/best-company-discovery-api.txt) yet.
This plan is free. We rank 771 plans for company discovery APIs by price. Half the plans cost $1.00 per 1,000 companies or less.
[StackScan's $189 monthly plan](https://datacircle.dev/company-discovery-apis/stackscan/189-monthly-enterprise-post-v1-tech-lookup-lists/llms.txt) is the cheapest paid plan per 1,000 companies: as little as $0.0000015. StackScan's $189 monthly plan covers up to 259,200 pages a month at no extra cost. Each page holds 500,000 companies.
[PeopleSearch.im's $5 pack](https://datacircle.dev/company-discovery-apis/peoplesearch-im/5-pack/llms.txt) covers any number of companies. PeopleSearch.im's $5 pack costs less up front than StackScan's $189 monthly plan.
[GetProspect](https://datacircle.dev/company-discovery-apis/getprospect/49-monthly/llms.txt), [Hunter](https://datacircle.dev/company-discovery-apis/hunter/49-monthly-starter-post-discover/llms.txt) and [PeopleSearch.im](https://datacircle.dev/company-discovery-apis/peoplesearch-im/5-pack/llms.txt) are the best company discovery API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/company-discovery-apis/happierleads/free
- [Company discovery API: 60+ providers compared](https://datacircle.dev/best-company-discovery-api.txt)
- Get it: https://happierleads.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- Request: `POST https://rest-admin.happierleads.com/v3/prospector/companies/search`
- API key: with the plan, on https://happierleads.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- Its API docs: https://documentation.happierleads.com/docs/leads/prospector/search-companies/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing#try=POST%20%2Fv3%2Fprospector%2Fcompanies%2Fsearch
- Sold by: Happierleads (https://happierleads.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing)
- Checked: 2026-11-04

## In the answer

- Completeness: 31%
- Industry: ✓
- Employees: ✓
- Headquarters: ✓
- Revenue and budgets: ✓

## Price

- $ per 1,000 companies: $0.00
- Per: page of 100
- Billing: free

## Aggregators

- Aggregators: none

## Charges

- Also pays for: from the same budget: Search people

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Search the company database from your own code to build target lists.

## Data

- Countries: Worldwide
- Keep data: no API terms
- Use data: no API terms

## Plan

- Pay: $0
- You get: 100 credits

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: websiteId, query. Optional: query.keywords, query.industries, query.locations, query.employeesMin, query.employeesMax, query.revenueMin, query.revenueMax, query.technologies, query.page, query.count
- Method: POST
- Path: /v3/prospector/companies/search

## About the plan

- Plan: Free trial
- Who can get it: anyone

## The 8 fields the plan's answer can hold

employees, employees range, country, country code, revenue range, industries, industry, total results

## Happierleads's plans (7)

- [Happierleads, free](https://datacircle.dev/company-discovery-apis/happierleads/free/llms.txt): $0.00 per 1,000, 31% complete
- [Happierleads, $99 monthly](https://datacircle.dev/company-discovery-apis/happierleads/99-monthly/llms.txt): 31% complete
- [Happierleads, $499 monthly](https://datacircle.dev/company-discovery-apis/happierleads/499-monthly/llms.txt): 31% complete
- [Happierleads, $699 monthly](https://datacircle.dev/company-discovery-apis/happierleads/699-monthly/llms.txt): 31% complete
- [Happierleads, $999 monthly](https://datacircle.dev/company-discovery-apis/happierleads/999-monthly/llms.txt): 31% complete
- [Happierleads, $1,299 monthly](https://datacircle.dev/company-discovery-apis/happierleads/1299-monthly/llms.txt): 31% complete
- [Happierleads, $1,999 monthly](https://datacircle.dev/company-discovery-apis/happierleads/1999-monthly/llms.txt): 31% complete

## Happierleads's calls for this API (1)

- `POST /v3/prospector/companies/search`: [Happierleads, free](https://datacircle.dev/company-discovery-apis/happierleads/free/llms.txt)

## Happierleads's APIs (4)

- [Happierleads: company discovery API pricing, 7 plans](https://datacircle.dev/company-discovery-apis/happierleads/free/llms.txt)
- [Happierleads: people search API pricing, 7 plans](https://datacircle.dev/people-search-apis/happierleads/free/llms.txt)
- [Happierleads: company enrichment API pricing, 8 plans](https://datacircle.dev/company-enrichment-apis/happierleads/free-trial/llms.txt)
- [Happierleads: email finder API pricing, 8 plans](https://datacircle.dev/find-email-apis/happierleads/free-developer/llms.txt)

## Happierleads: company discovery API alternatives

- [GetProspect, free](https://datacircle.dev/company-discovery-apis/getprospect/free/llms.txt): $0.00 per 1,000, 62% complete, stored
- [Hunter, free, POST /discover](https://datacircle.dev/company-discovery-apis/hunter/free-post-discover/llms.txt): $0.00 per 1,000, 54% complete, stored
- [PeopleSearch.im, free](https://datacircle.dev/company-discovery-apis/peoplesearch-im/free/llms.txt): $0.00 per 1,000, 38% complete, stored
- [AnVendor, free, POST /v1/leads/search](https://datacircle.dev/company-discovery-apis/anvendor/free-post-v1-leads-search/llms.txt): $0.00 per 1,000, 23% complete, stored
- [Datahyena, free](https://datacircle.dev/company-discovery-apis/datahyena/free/llms.txt): $0.00 per 1,000, 46% complete

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-04.

- https://documentation.happierleads.com/docs/account/billing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- https://documentation.happierleads.com/docs/leads/company-enrichment/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- https://documentation.happierleads.com/docs/leads/prospector/search-companies/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- https://happierleads.com/api-partner?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- https://happierleads.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- https://happierleads.com/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- https://rest-admin.happierleads.com/admin/api-docs.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing