# Leadbase, free: Company discovery API

> Find companies your team can win. Describe what your ideal customers actually do. Search by meaning across 70M+ company profiles, then refine the list with your own criteria to uncover relevant accounts beyond broad industry labels.

Leadbase's Free plan for the company discovery API costs $0.00 per 1,000 companies. We check each provider's docs for 13 fields. Leadbase's docs list 4: Industry, Employees, Social profiles, Locations.
We haven't run Leadbase through [our company discovery API benchmark](https://datacircle.dev/best-company-discovery-api.txt) yet.
This plan is free. We rank 1,326 plans for company discovery APIs by price. Half the plans cost $0.498 or less per 1,000 companies. [See the best free company discovery API plan.](https://datacircle.dev/best-company-discovery-api.txt)
[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. StackScan's $189 monthly plan charges nothing 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. 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/leadbase/free
- [Company discovery API in 2026: the best of 100+ compared](https://datacircle.dev/best-company-discovery-api.txt)
- Get it: https://www.leadbase.io/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- Request: `POST https://www.leadbase.io/api/v1/operations/prospects.company_search`
- API key: with the plan, on https://www.leadbase.io/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- Its API docs: https://www.leadbase.io/docs/enrichment/prospects?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- Sold by: Leadbase (https://www.leadbase.io?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing)
- Checked: 2026-11-10

## In the answer

- Completeness: 31%
- Industry: ✓
- Employees: ✓
- Social profiles: ✓
- Locations: ✓

## Price

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

## Aggregators

- Aggregators: none

## Charges

- Also pays for: from the same budget: Prospects People Search · Prospects Find Email · Prospects Find Phone · Enrichment Start · Sheets Research · Sheets Enrich · Tools Run

## Overage

- Units cap: hard

## Not found

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

## In their words

- Their pitch: Find companies your team can win. Describe what your ideal customers actually do. Search by meaning across 70M+ company profiles, then refine the list with your own criteria to uncover relevant accounts beyond broad industry labels.

## Data

- Freshness: 30 days
- Keep data: no limit
- Use data: Leadbase grants the customer a non-exclusive, non-transferable, revocable right of use for the services and provided data for the term of the contract. This right is limited to the agreed use and the booked service level. Permitted use: Lead generation and prospecting for own business purposes, CRM data enrichment for existing customer databases, Sales and marketing activities in the B2B area, Integration into own business processes and software tools, Forwarding enriched data to employees and authorized service providers. Prohibited use: Resale, rental or commercial transfer of data to third parties, Reverse engineering, decompilation or replication of the platform, Automated mass queries outside the API limits, Use for spam, unwanted advertising or harassment, Data breaches or breaches of opt-out requests, Use for illegal, harmful or discriminatory purposes, Creation of competing products or services. Absolutely prohibited use: Spam, unwanted mass advertising or cold email campaigns without legal basis, Sale, rental or other commercial transfer of data, Use for credit checks, background checks or other SCHUFA-like purposes, Discrimination based on sex, race, religion or other characteristics, Stalking, harassment or other unlawful contact, Generating fake identities or fake company profiles, Use for political campaigns without corresponding licensing, Breach of embargoes or trade restrictions.

## Plan

- Pay: €0
- You get: 200 credits
- Enough for: about 8,333 results, once
- Expires: never

## Rate limit

- Per second: 10
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: page, size, idempotencyKey. Optional: account, lookalikeDomains, lists
- Method: POST
- Path: /api/v1/operations/prospects.company_search

## About the plan

- Plan: Free
- Who can get it: business customers only ("Leadbase is intended exclusively for business customers (B2B)")

## The 11 fields the plan's answer can hold

company ID, name, domain, website, LinkedIn URL, industry, location, employee count, last updated, source ID, total results

## Leadbase's plans (4)

- [Leadbase, free](https://datacircle.dev/company-discovery-apis/leadbase/free/llms.txt): $0.00 per 1,000, 31% complete, 30 days
- [Leadbase, €390 monthly](https://datacircle.dev/company-discovery-apis/leadbase/390-monthly/llms.txt): $2.161 per 1,000, 31% complete, 30 days
- [Leadbase, €590 monthly](https://datacircle.dev/company-discovery-apis/leadbase/590-monthly/llms.txt): $1.875 per 1,000, 31% complete, 30 days
- [Leadbase, €990 monthly](https://datacircle.dev/company-discovery-apis/leadbase/990-monthly/llms.txt): $1.62 per 1,000, 31% complete, 30 days

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

- `POST /api/v1/operations/prospects.company_search`: [Leadbase, free](https://datacircle.dev/company-discovery-apis/leadbase/free/llms.txt)

## Leadbase's APIs (4)

- [Leadbase: company discovery API pricing, 4 plans](https://datacircle.dev/company-discovery-apis/leadbase/free/llms.txt)
- [Leadbase: email finder API pricing, 4 plans](https://datacircle.dev/find-email-apis/leadbase/free/llms.txt)
- [Leadbase: phone finder API pricing, 4 plans](https://datacircle.dev/find-phone-apis/leadbase/free/llms.txt)
- [Leadbase: people search API pricing, 4 plans](https://datacircle.dev/people-search-apis/leadbase/free/llms.txt)

## Leadbase: company discovery API alternatives

- [DiscoLike, $7,670 yearly](https://datacircle.dev/company-discovery-apis/discolike/7670-yearly/llms.txt): $1.60 per 1,000, 69% complete, 30 days
- [Exploding Topics, $4,000 monthly](https://datacircle.dev/company-discovery-apis/exploding-topics/4000-monthly/llms.txt): $1.60 per 1,000, 46% complete, 24 hours
- [Scrapebench, pay as you go, x402 pay per call, POST /v1/ca-contractor-directory](https://datacircle.dev/company-discovery-apis/scrapebench/pay-as-you-go-x402-pay-per-call-post-v1-ca-contractor-directory/llms.txt): $1.60 per 1,000, 23% complete, live
- [Findymail, $990 yearly, Starter, POST /api/intellimatch/search, Search leads](https://datacircle.dev/company-discovery-apis/findymail/990-yearly/llms.txt): $1.65 per 1,000, 31% complete, live

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-10.

- https://www.leadbase.io/api/v1/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- https://www.leadbase.io/docs/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- https://www.leadbase.io/docs/api/authentication?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- https://www.leadbase.io/docs/enrichment/prospects?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- https://www.leadbase.io/legal/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- https://www.leadbase.io/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing