# TheirStack, free: Cached company discovery API

> This endpoint lets you search for companies by technology stack, hiring signals, and firmographics.

TheirStack's cached company discovery API on its Free plan, $0.00 per 1,000 companies. 10 of the 13 key fields: Description, Industry, Type and status, Images, Technologies, Employees, Social profiles, Headquarters, Funding, Revenue and budgets.

- This page: https://datacircle.dev/cached-company-discovery-apis/theirstack/free
- Get it: https://theirstack.com/en/pricing
- Its API docs: https://theirstack.com/en/docs/api-reference/companies/search_companies_v1
- Sold by: TheirStack (https://theirstack.com)
- Checked: 2026-10-18

## In the answer

- Completeness: 77%
- Description: ✓
- Industry: ✓
- Type and status: ✓
- Images: ✓
- Technologies: ✓
- Employees: ✓
- Social profiles: ✓
- Headquarters: ✓
- Funding: ✓
- Revenue and budgets: ✓

## Price

- $ per 1,000: $0.00
- Billing: free

## Aggregators

- Aggregators: AnyAPI: paid $199.20 per 1,000 results · Clay: your key no Data Credits, 1 Action per call (Actions start at less than $0.01 each), paid, no fixed price · ColdIQ: your key free: 0 credits on ColdIQ, the provider bills your own account (Instantly, lemlist, TheirStack), paid $178.20 per 1,000 results · Databar: your key 0 credits a call on the Build or Scale plan, paid, page size not stated · Deepline: paid $166.00 per 1,000 results

## Charges

- Repeat free: never
- Per: result
- Most per search: 125
- Also pays for: from the same budget: Job Search · Technographics

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: This endpoint lets you search for companies by technology stack, hiring signals, and firmographics.

## Data

- Freshness: stored
- Keep data: Perpetual license to retain and use TheirStack data internally [...] after termination, all TheirStack data lawfully obtained during the Term [...] this license permits internal use only, it does not permit resale, redistribution, publication, or any other use prohibited by Section 4. Deletion of bulk copies. [...] Upon termination for any reason, the User shall, within thirty (30) days, delete or destroy every copy in its possession or control of any Dataset in whole or substantially in whole [...] including [...] bulk exports, raw API response archives [...]. Copies residing in backups and legacy systems shall be deleted within ninety (90) days
- Use data: the User may use the Services for the following purposes: Business-to-business sales, marketing, recruiting, or business development activities, Reposting, redistributing, and publicly displaying job postings [...], Reselling TheirStack data partially through their own platform, Viewing and analyzing Licensed Materials, Communicating with Licensed Materials Contacts in a professional manner, Identifying prospective sales opportunities, Researching existing customers and prospects. The User is expressly prohibited from: Creating or offering a competing product or service to TheirStack's core services, Distributing, sublicensing, reselling, or otherwise making available TheirStack data in a way that competes with TheirStack's primary business, Providing any single customer with any Dataset in whole or substantially in whole [...], Sharing login credentials, account access, API keys, or other access methods with any person who is not an Authorized User, Publishing or displaying TheirStack's company technographic data [...] or buying intent data on any publicly accessible website, application, or platform without requiring User authentication (login) or a paid subscription (paywall) [...], Using TheirStack's company technographic data or buying intent data to create publicly indexable content [...] designed to attract organic search traffic in a manner that competes with TheirStack's own pages or services [...], Reverse engineering [...], Scraping, copying, reproducing, or recreating TheirStack's website content, data, or landing pages [...], Copying, reproducing, or mimicking TheirStack's SEO-related elements [...]. The User shall not, without TheirStack's prior written consent, distribute, sublicense, resell, or otherwise make TheirStack data available as a standalone dataset, data feed, or data product where the TheirStack data constitutes the primary value of the offering

## Plan

- Pay: $0
- You get: 200 credits a month
- Enough for: about 66 results a month

## Rate limit

- Per day: 400
- Per second: 0.014

## Speed

- Answer: in the call

## The call

- You send: nothing required. Optional: cursor, company_country_code_not, company_country_code_not_or_null, company_country_code_or, company_description_pattern_accent_insensitive, company_description_pattern_not, company_description_pattern_or, company_domain_not, company_domain_or, company_id_not, company_id_or, company_investors_or, company_investors_partial_match_or, company_keyword_slug_and, company_keyword_slug_not, company_keyword_slug_or, company_linkedin_url_or, company_list_id_not, company_list_id_or, company_location_pattern_or, company_name_case_insensitive_or, company_name_not, company_name_or, company_name_partial_match_not, company_name_partial_match_or, company_not_revealed_at_gte, company_not_revealed_at_lte, company_not_revealed_within_hours, company_revealed_at_gte, company_revealed_at_lte, company_revealed_within_hours, company_tags_or, company_technology_slug_and, company_technology_slug_not, company_technology_slug_or, company_type, expand_technology_slugs, funding_stage_or, include_total_results, industry_id_not, industry_id_not_or_null, industry_id_or, job_filters, last_funding_round_date_gte, last_funding_round_date_lte, limit, max_employee_count, max_employee_count_or_null, max_funding_usd, max_revenue_usd, min_employee_count, min_employee_count_or_null, min_funding_usd, min_num_jobs_found, min_revenue_usd, offset, only_yc_companies, order_by, page, property_exists_and, property_exists_or, revealed_company_data, tech_filters
- Method: POST
- Path: /v1/companies/search

## About the plan

- Plan: Free
- Who can get it: a legal entity that has never paid for any credits (the terms' User is 'the legal entity that subscribes to or accesses the Services')

## The 39 fields the plan's answer can hold

name, domain, LinkedIn URL, LinkedIn ID, logo, company ID, industry, industry ID, country, country code, city, postal code, employee count, employee count range, founded year, annual revenue, total funding, funding stage, last funding round amount, last funding round date, investors, publicly traded symbol, stock exchange, YC batch, description, SEO description, keywords, tags, alternative domains, Alexa ranking, Apollo ID, technologies, technology count, job count, jobs last 30 days, matching jobs, matching technologies, recruiting agency, total results

## TheirStack's plans (13)

- [TheirStack, free](https://datacircle.dev/cached-company-discovery-apis/theirstack/free/llms.txt): $0.00 per 1,000, 77% complete, stored
- [TheirStack, $49 monthly](https://datacircle.dev/cached-company-discovery-apis/theirstack/49-monthly/llms.txt): $98.00 per 1,000, 77% complete, stored
- [TheirStack, $100 monthly](https://datacircle.dev/cached-company-discovery-apis/theirstack/100-monthly/llms.txt): $60.00 per 1,000, 77% complete, stored
- [TheirStack, $169 monthly](https://datacircle.dev/cached-company-discovery-apis/theirstack/169-monthly/llms.txt): $50.70 per 1,000, 77% complete, stored
- [TheirStack, $240 monthly](https://datacircle.dev/cached-company-discovery-apis/theirstack/240-monthly/llms.txt): $36.00 per 1,000, 77% complete, stored
- [TheirStack, $400 monthly](https://datacircle.dev/cached-company-discovery-apis/theirstack/400-monthly/llms.txt): $24.00 per 1,000, 77% complete, stored
- [TheirStack, $600 monthly](https://datacircle.dev/cached-company-discovery-apis/theirstack/600-monthly/llms.txt): $18.00 per 1,000, 77% complete, stored
- [TheirStack, $900 monthly](https://datacircle.dev/cached-company-discovery-apis/theirstack/900-monthly/llms.txt): $13.50 per 1,000, 77% complete, stored
- [TheirStack, $1,200 monthly](https://datacircle.dev/cached-company-discovery-apis/theirstack/1200-monthly/llms.txt): $7.20 per 1,000, 77% complete, stored
- [TheirStack, $1,500 monthly](https://datacircle.dev/cached-company-discovery-apis/theirstack/1500-monthly/llms.txt): $4.50 per 1,000, 77% complete, stored
- [TheirStack, $2,300 monthly](https://datacircle.dev/cached-company-discovery-apis/theirstack/2300-monthly/llms.txt): $3.45 per 1,000, 77% complete, stored
- [TheirStack, $5,500 monthly](https://datacircle.dev/cached-company-discovery-apis/theirstack/5500-monthly/llms.txt): $3.30 per 1,000, 77% complete, stored
- [TheirStack, contact us](https://datacircle.dev/cached-company-discovery-apis/theirstack/contact-us/llms.txt): 77% complete, stored

## TheirStack's calls (1)

- `POST /v1/companies/search`: [TheirStack, free](https://datacircle.dev/cached-company-discovery-apis/theirstack/free/llms.txt)

## Similar plans of other providers

- [Exa, free, World AgentKit free trial](https://datacircle.dev/cached-company-discovery-apis/exa/free-world-agentkit-free-trial/llms.txt): $0.00 per 1,000, 54% complete, stored
- [DataForSEO, free](https://datacircle.dev/cached-company-discovery-apis/dataforseo/free/llms.txt): $0.00 per 1,000, 46% complete, stored
- [ZoomInfo, free](https://datacircle.dev/cached-company-discovery-apis/zoominfo/free/llms.txt): $0.00 per 1,000, 31% complete, stored
- [Coresignal, free](https://datacircle.dev/cached-company-discovery-apis/coresignal/free/llms.txt): $0.00 per 1,000, 0% 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 2026-10-18.

- https://theirstack.com/en/docs/api-reference/companies/search_companies_v1
- https://theirstack.com/en/docs/api-reference/pagination
- https://theirstack.com/en/docs/api-reference/rate-limit
- https://theirstack.com/en/docs/data/job/freshness
- https://theirstack.com/en/docs/legal/terms-and-conditions
- https://theirstack.com/en/docs/pricing/credits
- https://theirstack.com/en/docs/pricing/plans
- https://theirstack.com/en/pricing