> ## Documentation Index > Fetch the complete documentation index at: https://technologychecker.io/docs/llms.txt > Use this file to discover all available pages before exploring further. # Get companies by technology API > Get companies using a specific technology with optional filters for country, industry, employee count, city, state, company type, and founding year. Data from 25.4M LinkedIn company records. ## Frequently asked questions Each company record includes domain, company name, LinkedIn URL, industry, country, city, state, founding year, employee count range, company type, and associated LinkedIn member count. Data comes from TechnologyChecker's database of 25.4M LinkedIn company records. Yes. Use query parameters like `country`, `industry`, `employees`, `city`, `state`, `company_type`, `founded_min`, and `founded_max`. All text filters are case-insensitive. You can combine multiple filters in a single request to narrow your results. Use the `limit` (max 100, default 50) and `offset` parameters. The response includes a `total` count showing the full number of matching companies. Increment `offset` by your `limit` value in each request until you've fetched all records. ## OpenAPI ````yaml GET /v1/technology/{id}/companies openapi: 3.1.0 info: title: TechnologyChecker API description: >- Discover technology stacks, track market trends, and enrich data with company intelligence. version: 1.0.0 contact: name: TechnologyChecker Support email: support@technologychecker.io url: https://technologychecker.io servers: - url: https://api.technologychecker.io description: Production security: - bearerAuth: [] tags: - name: Domain technologies description: Look up technologies detected on any domain - name: Technology data description: Search, look up, and get details on tracked technologies - name: Market intelligence description: Technology stats, trends, and market share - name: Company data description: Firmographic and company intelligence - name: Live detection description: Real-time technology detection with browser rendering paths: /v1/technology/{id}/companies: get: tags: - Company data summary: Get companies by technology API description: >- Get companies using a specific technology with optional company filters (country, industry, employees, etc.). operationId: getCompaniesByTechnology parameters: - name: id in: path required: true description: Technology ID schema: type: integer example: 268 - name: country in: query description: Filter by country (case-insensitive) schema: type: string - name: city in: query description: Filter by city (case-insensitive) schema: type: string - name: state in: query description: Filter by state (case-insensitive) schema: type: string - name: industry in: query description: Filter by industry (case-insensitive) schema: type: string - name: industry_code in: query description: LinkedIn industry code (1–201) schema: type: integer minimum: 1 maximum: 201 - name: employees in: query description: Employee range schema: type: string enum: - 1-1 - 1-10 - 2-10 - 11-50 - 51-200 - 201-500 - 501-1000 - 1001-5000 - 5001-10000 - 10001+ - name: company_type in: query description: Company type schema: type: string enum: - Privately Held - Self-Owned - Partnership - Self-Employed - Public Company - Nonprofit - Educational - Government Agency - name: founded_min in: query description: Minimum founding year (1800–2025) schema: type: integer minimum: 1800 maximum: 2025 - name: founded_max in: query description: Maximum founding year (1800–2025) schema: type: integer minimum: 1800 maximum: 2025 - name: limit in: query description: Results per page (max 100) schema: type: integer default: 50 maximum: 100 - name: offset in: query description: Pagination offset schema: type: integer default: 0 responses: '200': description: Companies using the technology content: application/json: schema: type: object properties: success: type: boolean example: true data: type: object properties: technology: $ref: '#/components/schemas/TechnologyBasic' companies: type: array items: $ref: '#/components/schemas/Company' total: type: integer example: 133 limit: type: integer example: 50 offset: type: integer example: 0 '401': $ref: '#/components/responses/Unauthorized' '404': $ref: '#/components/responses/NotFound' '429': $ref: '#/components/responses/RateLimited' components: schemas: TechnologyBasic: type: object properties: id: type: integer example: 268 name: type: string example: React category: type: string example: JavaScript Frameworks Company: type: object properties: domain: type: string example: stripe.com subdomain: type: string nullable: true company_name: type: string example: Stripe, Inc. linkedin_url: type: string example: linkedin.com/company/stripe industry: type: string example: Technology, Information and Internet industry_code: type: integer example: 6 country: type: string example: united states city: type: string example: south san francisco state: type: string example: california founded: type: integer example: 2010 employees: type: string example: 1001-5000 company_type: type: string example: Privately Held associated_members: type: integer example: 12741 ApiError: type: object properties: success: type: boolean example: false error: type: object properties: code: type: string example: UNAUTHORIZED message: type: string example: Missing or invalid API key responses: Unauthorized: description: Missing or invalid API key content: application/json: schema: $ref: '#/components/schemas/ApiError' NotFound: description: Resource not found content: application/json: schema: $ref: '#/components/schemas/ApiError' RateLimited: description: Rate limit exceeded content: application/json: schema: $ref: '#/components/schemas/ApiError' securitySchemes: bearerAuth: type: http scheme: bearer description: >- API key in format `tapi_live_[32-char]` (live) or `tapi_test_[32-char]` (test) ````