# FinAuth, free: Business verification API

> FinAuth provides an all-in-one developer identity layer to authenticate users, detect deepfakes, verify corporate registries, and monitor transactions.

FinAuth's Free tier plan for the business verification API costs $0.00 per 1,000 companies. We check each provider's docs for 11 fields. FinAuth's docs list 3: Registered name, Entity number, Entity type.
FinAuth limits how many calls you get but gives no number.
We haven't run FinAuth through [our business verification API benchmark](https://datacircle.dev/best-business-verification-api.txt) yet.
This plan is free. We rank 1,422 plans for business verification APIs by price. Half the plans cost $7.895 or less per 1,000 companies. [See the best free business verification API plan.](https://datacircle.dev/best-business-verification-api.txt)
[CharityAPI's $15 monthly plan](https://datacircle.dev/business-verification-apis/charityapi/15-monthly-paid-get-api-organizations-ein/llms.txt) is the cheapest paid plan per 1,000 companies. CharityAPI's plan covers companies in the United States only. CharityAPI's $15 monthly plan charges nothing per call. You get as many companies as CharityAPI's rate limit allows. [ApiZero's CNY 399 yearly plan](https://datacircle.dev/business-verification-apis/apizero/cny-399-yearly-diamond-membership-get-api-company-search/llms.txt) costs the least for 10,000 companies a month: about $4.97.
[Scoris's €19 pack](https://datacircle.dev/business-verification-apis/scoris/19-pack/llms.txt) covers any number of companies in 8 countries only. Scoris's €19 pack costs more up front than CharityAPI's $15 monthly plan.
[GovFiles](https://datacircle.dev/business-verification-apis/govfiles/top-up/llms.txt), [CompanyData.com](https://datacircle.dev/business-verification-apis/companydata-com/249-monthly/llms.txt) and [Didit](https://datacircle.dev/business-verification-apis/didit/top-up-from-50/llms.txt) are the best business verification API providers in the Datacircle benchmark for companies in any country.

- This page: https://datacircle.dev/business-verification-apis/finauth/free
- [Business verification API: the 14 best providers compared](https://datacircle.dev/best-business-verification-api.txt)
- Get it: https://docs.finauth.io/getting-started/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- Request: `POST https://api.finauth.io/v3/kyb/search/`
- API key: with the plan, on https://docs.finauth.io/getting-started/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- Its API docs: https://docs.finauth.io/standalone-apis/kyb-registry/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing#how-billing-works
- Sold by: FinAuth (https://finauth.io?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing)
- Checked: 2026-11-08

## In the answer

- Completeness: 27%
- Registered name: ✓
- Entity number: ✓
- Entity type: ✓

## Price

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

## Aggregators

- Aggregators: none

## Charges

- Also pays for: nothing else

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: FinAuth provides an all-in-one developer identity layer to authenticate users, detect deepfakes, verify corporate registries, and monitor transactions.

## Data

- Freshness: live
- Countries: Worldwide
- Keep data: no limit
- Use data: You may use FinAuth APIs and SDKs only in accordance with documentation, usage limits, applicable laws, and your commercial agreement with FinAuth. You must not bypass rate limits, disable security controls, reverse engineer protected components, or use the services to build a competing biometric or identity verification product unless expressly authorized in writing. [...] You must not use FinAuth to violate laws, infringe rights, discriminate unlawfully, conduct unauthorized surveillance, process data without required authorization, transmit malware, interfere with service operations, or attempt to gain unauthorized access to systems or data.

## Plan

- Pay: $0

## Rate limit

- Per second: 5
- Batch: 1

## Speed

- Answer: in the call or by webhook

## The call

- You send: company name, country. Optional: registration number, webhook_url
- Method: POST
- Path: /v3/kyb/search/

## About the plan

- Plan: Free tier
- Who can get it: anyone: sign-up, no credit card

## The 9 fields the plan's answer can hold

KYB response ID, company name, registration number, registry status, company type, risk level, fetch status, search status, total results

## FinAuth's plans (3)

- [FinAuth, free](https://datacircle.dev/business-verification-apis/finauth/free/llms.txt): $0.00 per 1,000, 27% complete, live
- [FinAuth, top-up, Prepaid credits, POST /v3/kyb/search/](https://datacircle.dev/business-verification-apis/finauth/top-up-prepaid-credits-post-v3-kyb-search/llms.txt): $0.00 per 1,000, 27% complete, live
- [FinAuth, contact us, Enterprise, POST /v3/kyb/search/](https://datacircle.dev/business-verification-apis/finauth/contact-us-enterprise-post-v3-kyb-search/llms.txt): 27% complete, live

## FinAuth's calls (2)

- `POST /v3/kyb/search/`: [FinAuth, free](https://datacircle.dev/business-verification-apis/finauth/free/llms.txt)
- `POST /v3/kyb/select/`: [FinAuth, top-up, Prepaid credits, POST /v3/kyb/select/](https://datacircle.dev/business-verification-apis/finauth/top-up-prepaid-credits-post-v3-kyb-select/llms.txt)

## FinAuth's APIs (1)

- [FinAuth: business verification API pricing, 3 plans](https://datacircle.dev/business-verification-apis/finauth/free/llms.txt)

## FinAuth: business verification API alternatives

- [eucompliance.tools, free, no key, GET /free/company](https://datacircle.dev/business-verification-apis/eucompliance-tools/free-no-key-get-free-company/llms.txt): $0.00 per 1,000, 55% complete, live
- [Brreg, free](https://datacircle.dev/business-verification-apis/brreg/free/llms.txt): $0.00 per 1,000, 64% complete, live
- [Charity Commission, free](https://datacircle.dev/business-verification-apis/charity-commission/free/llms.txt): $0.00 per 1,000, 36% complete, live
- [FastCAC, top-up](https://datacircle.dev/business-verification-apis/fastcac/top-up/llms.txt): $0.00 per 1,000, 36% 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 2026-11-08.

- https://docs.finauth.io?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://docs.finauth.io/business-verification/company-data?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://docs.finauth.io/business-verification/quickstart?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://docs.finauth.io/business-verification/supported-countries?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://docs.finauth.io/getting-started/api-authentication?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://docs.finauth.io/getting-started/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://docs.finauth.io/integration/programmatic-registration?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://docs.finauth.io/integration/rate-limiting?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://docs.finauth.io/standalone-apis/kyb-registry?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://finauth.io/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing