# Leadsets, free: Company discovery API

> Find companies by industry, headcount, country and technology. Each record says why it matched and carries a last-seen date and confidence for every field.

Leadsets' Free plan for the company discovery API costs $0.00 per 1,000 companies. We check each provider's docs for 13 fields. Leadsets' docs list 8: Description, Industry, Type and status, Technologies, Employees, Social profiles, Locations, Revenue and budgets.
We haven't run Leadsets through [our company discovery API benchmark](https://datacircle.dev/best-company-discovery-api.txt) yet.
This plan is free. We rank 1,345 plans for company discovery APIs by price. Half the plans cost $0.45 or less per 1,000 companies. [649 company discovery API plans on our price sheet are free.](https://datacircle.dev/best-company-discovery-api.txt) [AdLibrarySpy's free plan](https://datacircle.dev/company-discovery-apis/adlibraryspy/free/llms.txt) scores highest of the free plans in our benchmark, at 67.3 out of 100.
[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, with no charge per call. You get as many companies as StackScan's rate limit allows. [Seltz's pay-as-you-go plan](https://datacircle.dev/company-discovery-apis/seltz/pay-as-you-go-pay-as-you-go-post-v1-search-search-base/llms.txt) costs the least for 10,000 companies a month: $0.03.
[PeopleSearch.im's $5 pack](https://datacircle.dev/company-discovery-apis/peoplesearch-im/5-pack/llms.txt) covers any number of companies, and 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/leadsets/free
- [Company discovery API in 2026: the best of 100+ compared](https://datacircle.dev/best-company-discovery-api.txt)
- Get it: https://www.leadsets.ai/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- Request: `POST https://api.leadsets.ai/v1/companies/search`
- API key: with the plan, on https://www.leadsets.ai/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- Its API docs: https://www.leadsets.ai/docs/api/companies-search?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- Sold by: Leadsets (https://www.leadsets.ai?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing)
- Checked: 2026-11-11

## In the answer

- Completeness: 62%
- Description: ✓
- Industry: ✓
- Type and status: ✓
- Technologies: ✓
- Employees: ✓
- Social profiles: ✓
- Locations: ✓
- Revenue and budgets: ✓

## Price

- $ per 1,000 companies: $0.00
- Per: result
- Billing: free

## Aggregators

- Aggregators: none

## Charges

- Most per search: 100
- Also pays for: Enrich a person · Enrich a company · Verify emails · from the same budget: Search people

## Overage

- Units cap: hard

## Not found

- $ per 1,000 calls that find nothing: $0.00

## In their words

- Their pitch: Find companies by industry, headcount, country and technology. Each record says why it matched and carries a last-seen date and confidence for every field.

## Data

- Keep data: no limit
- Use data: Use must follow our Fair use policy. In short: no reselling or rebuilding our data, no key sharing across companies, no evading limits, no unlawful outreach, and no scraping of sites through Leadsets that you aren't allowed to access. [...] We grant you a non-exclusive, non-transferable licence to use records returned to you for your own sales, marketing and research. Embedding Leadsets data in a product you sell requires a separate written agreement. You must stop using any record we tell you has been suppressed.

## Plan

- Pay: $0
- You get: 100 results
- Enough for: 100 results, once
- Expires: never

## Rate limit

- Concurrent: 3
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: nothing required. Optional: industry, employees, country, technology, domain, max_age_days, exclude_stale, limit, cursor, prompt
- Method: POST
- Path: /companies/search

## About the plan

- Plan: Free
- Who can get it: anyone using it for business purposes, 18 or older (its terms: "You must be at least 18 and using Leadsets for business purposes")

## The 20 fields the plan's answer can hold

company ID, name, domain, LinkedIn URL, industry, NAICS code, employee count, employee range, revenue range, location, founded year, description, technologies, refreshed at, confirmed at, stale after, stale, field sources, match reasons, next cursor

## Leadsets' plans (5)

- [Leadsets, free](https://datacircle.dev/company-discovery-apis/leadsets/free/llms.txt): $0.00 per 1,000, 62% complete
- [Leadsets, $29 monthly](https://datacircle.dev/company-discovery-apis/leadsets/29-monthly/llms.txt): 62% complete
- [Leadsets, $99 monthly](https://datacircle.dev/company-discovery-apis/leadsets/99-monthly/llms.txt): 62% complete
- [Leadsets, $399 monthly](https://datacircle.dev/company-discovery-apis/leadsets/399-monthly/llms.txt): 62% complete
- [Leadsets, $999 monthly](https://datacircle.dev/company-discovery-apis/leadsets/999-monthly/llms.txt): 62% complete

## Leadsets' calls for this API (1)

- `POST /companies/search`: [Leadsets, free](https://datacircle.dev/company-discovery-apis/leadsets/free/llms.txt)

## Leadsets' APIs (7)

- [Leadsets Company discovery API pricing, 5 plans](https://datacircle.dev/company-discovery-apis/leadsets/free/llms.txt)
- [Leadsets Company enrichment API pricing, 5 plans](https://datacircle.dev/company-enrichment-apis/leadsets/free/llms.txt)
- [Leadsets Email verification API pricing, 5 plans](https://datacircle.dev/validate-email-apis/leadsets/free/llms.txt)
- [Leadsets People search API pricing, 5 plans](https://datacircle.dev/people-search-apis/leadsets/free/llms.txt)
- [Leadsets Email finder API pricing, 5 plans, POST /people/enrich, Enrich a person](https://datacircle.dev/find-email-apis/leadsets/free-post-people-enrich-enrich-a-person/llms.txt)
- [Leadsets Email finder API pricing, 5 plans, POST /people/enrich, Enrich a person, full](https://datacircle.dev/find-email-apis/leadsets/free-post-people-enrich-enrich-a-person-full/llms.txt)
- [Leadsets People enrichment API pricing, 5 plans, POST /people/enrich, Enrich a person](https://datacircle.dev/person-enrichment-apis/leadsets/free-post-people-enrich-enrich-a-person/llms.txt)
- [Leadsets People enrichment API pricing, 5 plans, POST /people/enrich, Enrich a person, full](https://datacircle.dev/person-enrichment-apis/leadsets/free-post-people-enrich-enrich-a-person-full/llms.txt)
- [Leadsets Web scraping API pricing, 3 plans](https://datacircle.dev/web-scraping-apis/leadsets/9-pack/llms.txt)

## Leadsets: company discovery API alternatives

[Leadsets alternatives: other company discovery API providers by price](https://datacircle.dev/leadsets-alternatives.txt)

We list other providers' plans closest to this plan in price per 1,000 companies.

- [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
- [Landbase, free](https://datacircle.dev/company-discovery-apis/landbase/free/llms.txt): $0.00 per 1,000, 92% 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 2026-11-11.

- https://www.leadsets.ai/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- https://www.leadsets.ai/docs/api/companies-search?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- https://www.leadsets.ai/docs/authentication?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- https://www.leadsets.ai/docs/limits?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- https://www.leadsets.ai/fair-use?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- https://www.leadsets.ai/fair-use/search?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- https://www.leadsets.ai/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- https://www.leadsets.ai/pricing/free?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- https://www.leadsets.ai/pricing/max?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- https://www.leadsets.ai/pricing/pro?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- https://www.leadsets.ai/pricing/solo?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- https://www.leadsets.ai/pricing/team?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- https://www.leadsets.ai/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing