# ListSignal, free: Tech stack API

> Every technology, platform, plugin and app detected on the website, canonical names from the tech catalog.

ListSignal's tech stack API on its Free plan. It costs $0.00 per 1,000 companies. ListSignal's docs list 1 of the 13 key fields we check: Technology.
We haven't run ListSignal through [our tech stack API benchmark](https://datacircle.dev/best-tech-stack-api.txt) yet.
This plan is free. We rank 354 plans for tech stack APIs by price. Half the plans cost $7.96 per 1,000 companies or less.
[cl0q's $50 monthly plan](https://datacircle.dev/company-technology-apis/cl0q/50-monthly/llms.txt) is the cheapest paid plan per 1,000 companies: $0.0042.
[GetProspect's $49 monthly plan](https://datacircle.dev/company-technology-apis/getprospect/49-monthly/llms.txt) covers any number of companies. GetProspect's $49 monthly plan costs less up front than cl0q's $50 monthly plan.
[JobsPipe](https://datacircle.dev/company-technology-apis/jobspipe/149-monthly-growth-post-v1-stack-scan/llms.txt), [DetectZeStack](https://datacircle.dev/company-technology-apis/detectzestack/79-monthly-mega-get-analyze/llms.txt) and [GetProspect](https://datacircle.dev/company-technology-apis/getprospect/49-monthly/llms.txt) are the best tech stack API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/company-technology-apis/listsignal/free
- [Tech stack API: find a company's technologies](https://datacircle.dev/best-tech-stack-api.txt)
- Get it: https://listsignal.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- Request: `GET https://listsignal.com/api/v1/company/{domain}`
- API key: with the plan, on https://listsignal.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- Its API docs: https://listsignal.com/developers?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- Sold by: ListSignal (https://listsignal.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing)
- Checked: 2026-11-06

## In the answer

- Completeness: 8%
- Technology: ✓

## Price

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

## Aggregators

- Aggregators: none

## Charges

- Also pays for: from the same budget: searchCompanies · queryCompanies · listChanges

## Overage

- Units cap: hard

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Every technology, platform, plugin and app detected on the website, canonical names from the tech catalog.

## Data

- Freshness: 1 month
- Keep data: no limit
- Use data: You may use ListSignal data for legitimate business purposes: sales prospecting, market research, competitive analysis, and technology evaluation. You may not use the service to send unsolicited bulk email, to break any applicable law, including marketing and data protection law in the recipient's country, or to attempt to reach private or authenticated content through us. [...] Exports, downloads and purchased data files are licensed to you for use within your own organisation. You may use them internally, including for your own sales and marketing, and you may include insights derived from them in your own work. You may not resell, republish, sublicense, or redistribute the data as a dataset, in whole or in substantial part, and you may not use it to build or train a competing directory or database product.

## Plan

- Pay: $0
- You get: 1,000 results a month
- Enough for: 1,000 calls a month
- Expires: unused rows do not roll over, the counter resets on the 1st

## Rate limit

- Per second: 0.17
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: domain
- Method: GET
- Path: /api/v1/company/{domain}

## About the plan

- Plan: Free
- Who can get it: anyone

## The 19 fields the plan's answer can hold

technologies, DNS technologies, script domains, email provider, applicant tracking system, Shopify theme, Shopify theme store ID, Shopify Plus, hosting network operator, hosting network ASN, hosting network country, certificate issuer, MX records, nameservers, DMARC policy, DKIM selectors, BIMI record, bot wall, schema.org type

## ListSignal's plans (8)

- [ListSignal, free](https://datacircle.dev/company-technology-apis/listsignal/free/llms.txt): $0.00 per 1,000, 8% complete, 1 month
- [ListSignal, $49 monthly](https://datacircle.dev/company-technology-apis/listsignal/49-monthly/llms.txt): $19.60 per 1,000, 8% complete, 1 month
- [ListSignal, $149 monthly](https://datacircle.dev/company-technology-apis/listsignal/149-monthly/llms.txt): $9.933 per 1,000, 8% complete, 1 month
- [ListSignal, $399 monthly](https://datacircle.dev/company-technology-apis/listsignal/399-monthly/llms.txt): $5.32 per 1,000, 8% complete, 1 month
- [ListSignal, $999 monthly](https://datacircle.dev/company-technology-apis/listsignal/999-monthly/llms.txt): $13.32 per 1,000, 8% complete, 1 month
- [ListSignal, $490 yearly](https://datacircle.dev/company-technology-apis/listsignal/490-yearly/llms.txt): $16.333 per 1,000, 8% complete, 1 month
- [ListSignal, $1,490 yearly](https://datacircle.dev/company-technology-apis/listsignal/1490-yearly/llms.txt): $8.278 per 1,000, 8% complete, 1 month
- [ListSignal, $3,990 yearly](https://datacircle.dev/company-technology-apis/listsignal/3990-yearly/llms.txt): $4.433 per 1,000, 8% complete, 1 month

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

- `GET /api/v1/company/{domain}`: [ListSignal, free](https://datacircle.dev/company-technology-apis/listsignal/free/llms.txt)

## ListSignal's APIs (3)

- [ListSignal: company enrichment API pricing, 8 plans](https://datacircle.dev/company-enrichment-apis/listsignal/free/llms.txt)
- [ListSignal: tech stack API pricing, 8 plans](https://datacircle.dev/company-technology-apis/listsignal/free/llms.txt)
- [ListSignal: company discovery API pricing, 8 plans, GET /api/v1/query](https://datacircle.dev/company-discovery-apis/listsignal/free-get-api-v1-query/llms.txt)
- [ListSignal: company discovery API pricing, 8 plans, GET /api/v1/search](https://datacircle.dev/company-discovery-apis/listsignal/free-get-api-v1-search/llms.txt)

## ListSignal: tech stack API alternatives

- [Wappalyzer, contact us](https://datacircle.dev/company-technology-apis/wappalyzer/contact-us/llms.txt): $4.25 per 1,000, 85% complete, live
- [TheirStack, $1,500 monthly](https://datacircle.dev/company-technology-apis/theirstack/1500-monthly/llms.txt): $4.50 per 1,000, 23% complete, 1 day
- [ReefAPI, $112.50 quarterly](https://datacircle.dev/company-technology-apis/reefapi/112-50-quarterly/llms.txt): $4.50 per 1,000, 23% complete, live
- [AI Website Detector, €12 monthly](https://datacircle.dev/company-technology-apis/ai-website-detector/12-monthly/llms.txt): $4.501 per 1,000, 8% 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 2026-11-06.

- https://listsignal.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://listsignal.com/developers?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://listsignal.com/llms.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://listsignal.com/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://listsignal.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://listsignal.com/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing