# TechnologyChecker, free, GET /v1/signals/switch: Company discovery API

> Find domains that replaced one technology with a competing technology in the same category, with a destination flow chart. Costs 1 credit per request.

TechnologyChecker's company discovery API on its Free plan. It costs $0.00 per 1,000 companies. It returns 5 of the 13 key fields we check: Industry, Type and status, Technologies, Employees, Headquarters.
We rank 533 plans by price. [Deepline's top-up](https://datacircle.dev/company-discovery-apis/deepline/top-up/llms.txt) costs the least per 1,000 companies. Deepline's company discovery API costs nothing beyond the plan price.
[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 [Skrapp](https://datacircle.dev/company-discovery-apis/skrapp/349-monthly/llms.txt) are the best company discovery API providers in our benchmark.

- This page: https://datacircle.dev/company-discovery-apis/technologychecker/free-get-v1-signals-switch
- [Best company discovery API in 2026](https://datacircle.dev/best-company-discovery-api.txt)
- Get it: https://technologychecker.io/pricing
- Request: `GET https://api.technologychecker.io/v1/signals/switch`
- API key: with the plan, on https://technologychecker.io/pricing
- Its API docs: https://technologychecker.io/docs/api-reference/signals/competitive-switch-api
- Sold by: TechnologyChecker (https://technologychecker.io)
- Checked: 2026-10-26

## In the answer

- Completeness: 38%
- Industry: ✓
- Type and status: ✓
- Technologies: ✓
- Employees: ✓
- Headquarters: ✓

## Price

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

## Aggregators

- Aggregators: none

## Charges

- Most per search: 1,000
- Also pays for: Signal types index · List alerts API · Create alert API · Get alert API · Update alert API · Delete alert API · Test alert delivery API: roughly 10 per hour per key · Alert delivery log API · Create audience API: uploads are free · List audiences API · Get audience API · Update audience API: renaming is free · Delete audience API · List audience members API · Search technologies for lead lists API · Technology ID map API · Preview lead list count API · List lead lists API · Preview lead list API · Export lead list API · Delete lead list API · from the same budget: Domain lookup · Domain history · Domain tech changes · Find domains by technology · Technology lookup / search · Technology stats API · Technology usage trends API · Market share · Get companies by technology · Company lookup · Company search · Batch company lookup (1 per domain) · Adoption and churn signals API · Category whitespace API · Audience technology report · Audience breakdown · Segment technology stats · Build a computed audience · Live technology lookup · AI extractor · Create lead list API (1 per delivered row) · Export signals to CSV API (1 per exported row) · Churn validation · Audience refresh crawl · Alert crawl cadence

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Find domains that replaced one technology with a competing technology in the same category, with a destination flow chart. Costs 1 credit per request.

## Data

- Freshness: stored
- Keep data: Cached data must be refreshed at intervals consistent with your subscription plan
- Use data: You may integrate API data into your internal business applications, CRM systems, and workflows [...] You may not redistribute raw API data to third parties or make it publicly accessible without our written consent [...] You may not use API data to create a competing technology detection service or database [...] You must comply with all applicable data protection laws when processing personal data obtained through the API [...] The following activities are strictly prohibited: [...] Reselling, redistributing, sublicensing, or otherwise making the Service or its data available to third parties without our prior written consent [...] Using the Service or its data to build a competing product, service, or database [...] Using the Service to send unsolicited commercial communications (spam), including bulk emails, cold calls, or messages to contacts obtained through the Service without a legitimate legal basis

## Plan

- Pay: $0
- You get: 100 credits a month
- Enough for: 100 pages a month
- Expires: at the monthly reset, credits don't roll over

## Rate limit

- Per second: 0.17
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: one of technology_id, technology or category_id. Optional: direction, window, min_confidence, limit, country, city, state, industry, industry_code, employees, company_type, founded_min, founded_max, company, has_email, has_phone, social, language, web_country, segment_id
- Method: GET
- Path: /v1/signals/switch

## About the plan

- Plan: Free
- Who can get it: anyone 18 or over, for individual evaluation: the free plan may not be used for commercial-scale operations

## The 25 fields the plan's answer can hold

domain, subdomains, technology detection URL, previous technology ID, previous technology, new technology ID, new technology, technology category, technology churn date, technology adoption date, switch gap days, technology detection rate, change confidence label, switch flow destination ID, switch flow destination, switch flow sites, company name, industry, industry code, employee count range, country, city, state, founded, company type

## TechnologyChecker's plans (6)

- [TechnologyChecker, free, GET /v1/signals/switch](https://datacircle.dev/company-discovery-apis/technologychecker/free-get-v1-signals-switch/llms.txt): $0.00 per 1,000, 38% complete, stored
- [TechnologyChecker, $89 monthly, Pro, GET /v1/signals/switch](https://datacircle.dev/company-discovery-apis/technologychecker/89-monthly-pro-get-v1-signals-switch/llms.txt): $0.0089 per 1,000, 38% complete, stored
- [TechnologyChecker, $249 monthly, Scale, GET /v1/signals/switch](https://datacircle.dev/company-discovery-apis/technologychecker/249-monthly-scale-get-v1-signals-switch/llms.txt): $0.005 per 1,000, 38% complete, stored
- [TechnologyChecker, $890 yearly, Pro, GET /v1/signals/switch](https://datacircle.dev/company-discovery-apis/technologychecker/890-yearly-pro-get-v1-signals-switch/llms.txt): $0.0074 per 1,000, 38% complete, stored
- [TechnologyChecker, $2,490 yearly, Scale, GET /v1/signals/switch](https://datacircle.dev/company-discovery-apis/technologychecker/2490-yearly-scale-get-v1-signals-switch/llms.txt): $0.0042 per 1,000, 38% complete, stored
- [TechnologyChecker, contact us, Enterprise, GET /v1/signals/switch](https://datacircle.dev/company-discovery-apis/technologychecker/contact-us-enterprise-get-v1-signals-switch/llms.txt): 38% complete, stored

## TechnologyChecker's calls for this API (8)

- `GET /v1/signals/{type}`: [TechnologyChecker, free, GET /v1/signals/{type}](https://datacircle.dev/company-discovery-apis/technologychecker/free-get-v1-signals-type/llms.txt)
- `GET /v1/signals/whitespace`: [TechnologyChecker, free, GET /v1/signals/whitespace](https://datacircle.dev/company-discovery-apis/technologychecker/free-get-v1-signals-whitespace/llms.txt)
- `GET /v1/signals/switch`: [TechnologyChecker, free, GET /v1/signals/switch](https://datacircle.dev/company-discovery-apis/technologychecker/free-get-v1-signals-switch/llms.txt)
- `POST /v1/leads/create`: [TechnologyChecker, free, POST /v1/leads/create](https://datacircle.dev/company-discovery-apis/technologychecker/free-post-v1-leads-create/llms.txt)
- `GET /v1/signals/{type}/export`: [TechnologyChecker, free, GET /v1/signals/{type}/export](https://datacircle.dev/company-discovery-apis/technologychecker/free-get-v1-signals-type-export/llms.txt)
- `GET /v1/technology/name/{name}/domains`: [TechnologyChecker, free, GET /v1/technology/name/{name}/domains](https://datacircle.dev/company-discovery-apis/technologychecker/free-get-v1-technology-name-name-domains/llms.txt)
- `GET /v1/technology/{id}/companies`: [TechnologyChecker, free, GET /v1/technology/{id}/companies](https://datacircle.dev/company-discovery-apis/technologychecker/free-get-v1-technology-id-companies/llms.txt)
- `GET /v1/companies`: [TechnologyChecker, free, GET /v1/companies](https://datacircle.dev/company-discovery-apis/technologychecker/free-get-v1-companies/llms.txt)

## TechnologyChecker's APIs (3)

- [TechnologyChecker: company discovery API pricing, 6 plans, GET /v1/signals/switch](https://datacircle.dev/company-discovery-apis/technologychecker/free-get-v1-signals-switch/llms.txt)
- [TechnologyChecker: company enrichment API pricing, 6 plans, POST /v1/companies/batch](https://datacircle.dev/company-enrichment-apis/technologychecker/free-post-v1-companies-batch/llms.txt)
- [TechnologyChecker: company enrichment API pricing, 6 plans, GET /v1/company/{domain}](https://datacircle.dev/company-enrichment-apis/technologychecker/free-get-v1-company-domain/llms.txt)
- [TechnologyChecker: tech stack API pricing, 6 plans, GET /v1/domain/{domain}/changes](https://datacircle.dev/company-technology-apis/technologychecker/free-get-v1-domain-domain-changes/llms.txt)
- [TechnologyChecker: tech stack API pricing, 6 plans, GET /v1/domain/{domain}/history](https://datacircle.dev/company-technology-apis/technologychecker/free-get-v1-domain-domain-history/llms.txt)
- [TechnologyChecker: tech stack API pricing, 6 plans, GET /v1/domain/{domain}](https://datacircle.dev/company-technology-apis/technologychecker/free-get-v1-domain-domain/llms.txt)
- [TechnologyChecker: tech stack API pricing, 6 plans, POST /v1/technology-lookup-live](https://datacircle.dev/company-technology-apis/technologychecker/free-free-post-v1-technology-lookup-live/llms.txt)
- [TechnologyChecker: tech stack API pricing, 6 plans, GET /v1/technology-lookup-live](https://datacircle.dev/company-technology-apis/technologychecker/free-free-get-v1-technology-lookup-live/llms.txt)

## TechnologyChecker: company discovery API alternatives

- [graph8, $499 monthly](https://datacircle.dev/company-discovery-apis/graph8/499-monthly/llms.txt): $0.00012 per 1,000, 69% complete, stored
- [Argorant, $949 monthly](https://datacircle.dev/company-discovery-apis/argorant/949-monthly/llms.txt): $0.0018 per 1,000, 62% complete, stored
- [Hunter, $6,935 yearly, Data Platform, 950,000 Search credits, POST /discover](https://datacircle.dev/company-discovery-apis/hunter/6935-yearly-data-platform-950000-search-credits-post-discover/llms.txt): $0.0027 per 1,000, 54% complete, stored
- [The Swarm, $96,000 yearly, Enterprise 20000, POST /v3/companies/search](https://datacircle.dev/company-discovery-apis/the-swarm/96000-yearly-enterprise-20000-post-v3-companies-search/llms.txt): $0.0031 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 2026-10-26.

- https://technologychecker.io/docs/api-reference/credits
- https://technologychecker.io/docs/api-reference/openapi.json
- https://technologychecker.io/docs/api-reference/rate-limits
- https://technologychecker.io/docs/api-reference/signals/competitive-switch-api
- https://technologychecker.io/pricing
- https://technologychecker.io/terms-of-use