# ProPublica Nonprofit Explorer, free: Company discovery API

> Returns a list of organizations matching the given search terms.

ProPublica Nonprofit Explorer's Free plan for the company discovery API costs $0.00 per 1,000 companies. We check each provider's docs for 13 fields. ProPublica Nonprofit Explorer's docs list 1: Headquarters.
ProPublica Nonprofit Explorer limits how many pages you get but gives no number.
We haven't run ProPublica Nonprofit Explorer through [our company discovery API benchmark](https://datacircle.dev/best-company-discovery-api.txt) yet.
We rank 1,165 plans for company discovery APIs by price. Half the plans cost $0.525 or less per 1,000 companies. This plan and 170 others tie for the lowest price per 1,000 companies of the 1,165 plans. [See the best free company discovery API plan.](https://datacircle.dev/best-company-discovery-api.txt)
[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/propublica-nonprofit-explorer/free
- [Company discovery API: the best of 100+ providers compared](https://datacircle.dev/best-company-discovery-api.txt)
- Get it: https://projects.propublica.org/nonprofits/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- Request: `GET https://projects.propublica.org/nonprofits/api/v2/search.json`
- API key: not needed
- Its API docs: https://projects.propublica.org/nonprofits/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- Sold by: ProPublica Nonprofit Explorer (https://projects.propublica.org/nonprofits?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing)
- Checked: 2026-11-08

## In the answer

- Completeness: 8%
- Headquarters: ✓

## Price

- $ per 1,000 companies: $0.00
- Per: page of 25
- Billing: free

## Aggregators

- Aggregators: none

## Charges

- Also pays for: nothing else

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Returns a list of organizations matching the given search terms.

## Data

- Freshness: stored
- Countries: United States
- Keep data: no limit
- Use data: In general, you may use the free data published by ProPublica under the following terms. However, there may be different terms included for some datasets. [...] You can't republish the raw data in its entirety or otherwise distribute the data (in whole or in part) on a stand-alone basis. You can't change the data except to update or correct it. You can't charge people money to look at the data or sell advertising specifically against it. You can't sub-license or resell the data to others. If you use the data for publication, you must cite ProPublica. [...]

## Plan

- Pay: $0

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: nothing required. Optional: q, page, state[id], ntee[id], c_code[id]
- Method: GET
- Path: /search.json

## About the plan

- Plan: Free
- Who can get it: anyone

## The 15 fields the plan's answer can hold

EIN, formatted EIN, organization name, organization alternate name, city, state, NTEE code, raw NTEE code, IRS subsection code, has IRS subsection code, has filings, has extracts, has PDFs, relevance score, total results

## ProPublica Nonprofit Explorer's plans (1)

- [ProPublica Nonprofit Explorer, free](https://datacircle.dev/company-discovery-apis/propublica-nonprofit-explorer/free/llms.txt): $0.00 per 1,000, 8% complete, stored

## ProPublica Nonprofit Explorer's calls for this API (1)

- `GET /search.json`: [ProPublica Nonprofit Explorer, free](https://datacircle.dev/company-discovery-apis/propublica-nonprofit-explorer/free/llms.txt)

## ProPublica Nonprofit Explorer's APIs (3)

- [ProPublica Nonprofit Explorer: business verification API pricing, 1 plan](https://datacircle.dev/business-verification-apis/propublica-nonprofit-explorer/free/llms.txt)
- [ProPublica Nonprofit Explorer: company discovery API pricing, 1 plan](https://datacircle.dev/company-discovery-apis/propublica-nonprofit-explorer/free/llms.txt)
- [ProPublica Nonprofit Explorer: company enrichment API pricing, 1 plan](https://datacircle.dev/company-enrichment-apis/propublica-nonprofit-explorer/free/llms.txt)

## ProPublica Nonprofit Explorer: 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

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-08.

- https://projects.propublica.org/nonprofits/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- https://projects.propublica.org/nonprofits/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- https://projects.propublica.org/nonprofits/api/v2/search.json?q=propublica&utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- https://www.propublica.org/datastore/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing