# InvestorLists, free: Company discovery API

> Plain-language or filtered search: stages, sectors, states, cities, investor types, categories, team size, recent news, known AUM. Each result explains why it matched.

InvestorLists' Free plan for the company discovery API costs $0.00 per 1,000 companies. We check each provider's docs for 13 fields. InvestorLists' docs list 4: Industry, Type and status, Social profiles, Headquarters.
You get as many results as you like.
We haven't run InvestorLists 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/investorlists/free
- [Company discovery API in 2026: the best of 100+ compared](https://datacircle.dev/best-company-discovery-api.txt)
- Get it: https://investorlists.vc/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- Request: Docs behind sign-up
- API key: with the plan, on https://investorlists.vc/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- Its API docs: https://investorlists.vc/ai?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- Sold by: InvestorLists (https://investorlists.vc?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing)
- Checked: 2026-11-10

## In the answer

- Completeness: 31%
- Industry: ✓
- Type and status: ✓
- Social profiles: ✓
- Headquarters: ✓

## Price

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

## Aggregators

- Aggregators: none

## Charges

- Most per search: 15
- Also pays for: from the same budget: get_investor · unlock_firm

## Not found

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

## In their words

- Their pitch: Plain-language or filtered search: stages, sectors, states, cities, investor types, categories, team size, recent news, known AUM. Each result explains why it matched.

## Data

- Freshness: 24 hours
- Countries: United States
- Keep data: no limit
- Use data: When you purchase or access a digital product, you are granted a limited, non-exclusive, non-transferable, revocable license to use the product for your own internal business or personal use. The same license applies to data you retrieve through an AI tool connected to your account: the AI tool acts on your behalf and the data remains subject to these Terms. You may not: Resell, redistribute, sublicense, share, publish, or make the data available to any third party, Use the data to create or support competing products, databases, or services, Upload the data to public websites, repositories, forums, or AI training systems, Misrepresent the source of the data, Share your account, login codes, API keys, or AI-tool connection with others, or use automated means to extract the database beyond your plan, Use the data in any unlawful, abusive, deceptive, or non-compliant manner.

## Plan

- Pay: $0
- Enough for: no limit

## Rate limit

- Per second: 0.33 (20 a minute)
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: Docs behind sign-up

## About the plan

- Plan: Free
- Who can get it: anyone aged 18 or over with an email address ("Your email and a 6-digit code. That is all.")

## The 18 fields the plan's answer can hold

firm name, website, LinkedIn URL, city, state, thesis, investor type, investor category, investment stages, sectors, domains, team size, year founded, assets under management, date added, latest news headline, latest news source URL, match reason

## InvestorLists' plans (2)

- [InvestorLists, free](https://datacircle.dev/company-discovery-apis/investorlists/free/llms.txt): $0.00 per 1,000, 31% complete, 24 hours
- [InvestorLists, $997 yearly](https://datacircle.dev/company-discovery-apis/investorlists/997-yearly/llms.txt): no limit, 31% complete, 24 hours

## InvestorLists' calls for this API (1)

- Docs behind sign-up: [InvestorLists, free](https://datacircle.dev/company-discovery-apis/investorlists/free/llms.txt)

## InvestorLists' APIs (2)

- [InvestorLists Company discovery API pricing, 2 plans](https://datacircle.dev/company-discovery-apis/investorlists/free/llms.txt)
- [InvestorLists People search API pricing, 2 plans](https://datacircle.dev/people-search-apis/investorlists/free/llms.txt)

## InvestorLists: company discovery API alternatives

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

We list other providers' plans closest to this plan in price per 1,000 companies. Each plan in the list gives live data or data at most a day old.

- [Loopster, free](https://datacircle.dev/company-discovery-apis/loopster/free/llms.txt): $0.00 per 1,000, 23% complete, 1 day
- [Findymail, free trial, POST /api/intellimatch/search, Search leads](https://datacircle.dev/company-discovery-apis/findymail/free/llms.txt): $0.00 per 1,000, 31% complete, live
- [Sumble, free, POST /v9/organizations, Organizations](https://datacircle.dev/company-discovery-apis/sumble/free-post-v9-organizations-organizations/llms.txt): $0.00 per 1,000, 54% complete, 1 day
- [Captapi, free](https://datacircle.dev/company-discovery-apis/captapi/free/llms.txt): $0.00 per 1,000, 38% 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://investorlists.vc/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- https://investorlists.vc/ai?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- https://investorlists.vc/faq?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- https://investorlists.vc/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- https://investorlists.vc/terms-of-service-and-privacy-policy?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing