# CompanyBook, free: Business verification API

> Търсене на фирми по ЕИК, име, област

CompanyBook's business verification API on its Free account plan. It costs $0.00 per 1,000 companies. CompanyBook's docs list 3 of the 11 key fields we check: Registered name, Entity type, Status.
We haven't run CompanyBook through [our business verification API benchmark](https://datacircle.dev/best-business-verification-api.txt) yet.
This plan is free. We rank 903 plans for business verification APIs by price. Half the plans cost $7.895 per 1,000 companies or less.
[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.
[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), [Didit](https://datacircle.dev/business-verification-apis/didit/top-up-from-50/llms.txt) and [CompanyData.com](https://datacircle.dev/business-verification-apis/companydata-com/249-monthly/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/companybook/free
- [Business verification API: the 12 best providers compared](https://datacircle.dev/best-business-verification-api.txt)
- Get it: https://companybook.bg/subscribe?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- Request: `GET https://api.companybook.bg/api/v2/companies/search`
- API key: with the plan, on https://companybook.bg/subscribe?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- Its API docs: https://companybook.bg/api-docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- Sold by: CompanyBook (https://companybook.bg?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing)
- Checked: 2026-11-06

## In the answer

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

## Price

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

## Aggregators

- Aggregators: none

## Charges

- Also pays for: Get company financial data · from the same budget: Get a company by UIC · Get a person by identifier · Search people · Unified search

## Overage

- Units cap: hard

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Търсене на фирми по ЕИК, име, област

## Data

- Freshness: 1 day
- Countries: Bulgaria
- Keep data: no limit
- Use data: 4.1. Разрешено използване: Имате право да: [...] Използвате данните за лични или търговски цели, Използвате нашия API в съответствие с документацията, Разпространявате данните при спазване на лиценза CC BY 4.0 с признаване на източника. 4.2. Забранено използване: Забранява се да: [...] Извършвате автоматизирано събиране на данни (scraping) извън предоставения API, Претоварвате или нарушавате работата на инфраструктурата на Сайта, Заобикаляте установените технически ограничения и мерки за сигурност, Използвате данните по начин, който нарушава правата на трети лица [...] Забранява се използването на данните, предоставени чрез Сайта (включително контактни данни като имейл адреси и телефонни номера), за изпращане на нежелани търговски съобщения (спам), включително чрез имейл, SMS, телефонни обаждания или автоматизирани системи, в нарушение на приложимото законодателство. Забрана за високорисково обработване: Забранява се използването на данните за: Автоматизирано вземане на решения или профилиране с правни или съществени последици за физически лица, Обработване на специални категории лични данни, освен ако това е изрично разрешено от закона. 4.4. Търговско използване на данните: Имате право да използвате данните от TheCompanyBook в своите търговски продукти и услуги при следните условия: [...] Потребителите са длъжни да спазват условията на лиценз CC BY 4.0, включително изискването за посочване на първоначалния източник (Агенция по вписванията), когато това е приложимо. Забранено използване: Забранено е създаването на конкурентна услуга за търсене на фирми или физически лица, Забранено е предлагането на подобни услуги за база данни на дружества, Забранено е изграждането на продукти, които са съществено подобни на CompanyBook.bg. 5. Условия за използване на API: [...] Справедливо използване: Забранено е злоупотребата с API или опитите да се заобиколят установените лимити

## Plan

- Pay: $0
- You get: 100 requests a day
- Enough for: 100 calls a day

## Rate limit

- Per day: 100
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: one of uic or name. Optional: district, status, legal_form, nkid, vat, has_contact_data, has_active_financial_data, revenue_range, registration_year_from, registration_year_to, registration_date_from, registration_date_to, sort_by, sort_dir, limit, offset
- Method: GET
- Path: /api/v2/companies/search

## About the plan

- Plan: Free account
- Who can get it: anyone with a free account (each account is licensed to one natural person)

## The 13 fields the plan's answer can hold

UIC, name, name transliteration, legal form, status, district, VAT registered, email presence, phone presence, website presence, active financial year, latest revenue range, total results

## CompanyBook's plans (4)

- [CompanyBook, free](https://datacircle.dev/business-verification-apis/companybook/free/llms.txt): $0.00 per 1,000, 27% complete, 1 day
- [CompanyBook, €29.99 monthly](https://datacircle.dev/business-verification-apis/companybook/29-99-monthly/llms.txt): $1.125 per 1,000, 27% complete, 1 day
- [CompanyBook, €249.99 yearly](https://datacircle.dev/business-verification-apis/companybook/249-99-yearly/llms.txt): $0.257 per 1,000, 27% complete, 1 day
- [CompanyBook, contact us](https://datacircle.dev/business-verification-apis/companybook/contact-us/llms.txt): 27% complete, 1 day

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

- `GET /api/v2/companies/search`: [CompanyBook, free](https://datacircle.dev/business-verification-apis/companybook/free/llms.txt)

## CompanyBook's APIs (4)

- [CompanyBook: business verification API pricing, 4 plans](https://datacircle.dev/business-verification-apis/companybook/free/llms.txt)
- [CompanyBook: company discovery API pricing, 4 plans](https://datacircle.dev/company-discovery-apis/companybook/free/llms.txt)
- [CompanyBook: people search API pricing, 4 plans](https://datacircle.dev/people-search-apis/companybook/free/llms.txt)
- [CompanyBook: company enrichment API pricing, 4 plans, GET /api/companies/{uic}](https://datacircle.dev/company-enrichment-apis/companybook/free-account-get-api-companies-uic/llms.txt)
- [CompanyBook: company enrichment API pricing, 4 plans, GET /api/companies/{uic}/financial](https://datacircle.dev/company-enrichment-apis/companybook/free-account-get-api-companies-uic-financial/llms.txt)

## CompanyBook: business verification API alternatives

- [CBEAPI, €9 monthly](https://datacircle.dev/business-verification-apis/cbeapi/9-monthly/llms.txt): $0.135 per 1,000, 55% complete, 1 day
- [Firmbase, €29 monthly](https://datacircle.dev/business-verification-apis/firmbase/29-monthly/llms.txt): $0.163 per 1,000, 36% complete, 24 hours
- [W System EU Business Data, €599 monthly, Peppol Scale, POST /company/batch](https://datacircle.dev/business-verification-apis/w-system-eu-business-data/599-monthly-peppol-scale-post-company-batch/llms.txt): $0.27 per 1,000, 55% complete, live
- [DanskCVRAPI, DKK 99 monthly, Basis, GET /companies/search](https://datacircle.dev/business-verification-apis/danskcvrapi/dkk-99-monthly-basis-get-companies-search/llms.txt): $0.298 per 1,000, 45% complete, 1 minute

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-06.

- https://companybook.bg/api-docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://companybook.bg/features?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://companybook.bg/llms-full.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://companybook.bg/llms.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://companybook.bg/subscribe?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://companybook.bg/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing