# Echoloc, free: Tech stack API

> It goes beyond front-end tools detectable from websites — backend, data infrastructure, cloud, AI tooling, and business systems — and tracks the direction of change: what companies are adopting, evaluating, and replacing.

Echoloc's Beta plan for the tech stack API costs $0.00 per 1,000 companies. We check each provider's docs for 13 fields. Echoloc's docs list 1: Technology.
We haven't run Echoloc through [our tech stack API benchmark](https://datacircle.dev/best-tech-stack-api.txt) yet.
This plan is free. We rank 397 plans for tech stack APIs by price. Half the plans cost $6.00 or less per 1,000 companies. [See the best free tech stack API plan.](https://datacircle.dev/best-tech-stack-api.txt)
[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. [Enterno's ₽2,511 yearly plan](https://datacircle.dev/company-technology-apis/enterno/2511-yearly-explorer-get-api-v4-cms/llms.txt) costs the least for 10,000 companies a month: about $2.50.
[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/echoloc/free
- [Company technologies API: tech stack APIs compared](https://datacircle.dev/best-tech-stack-api.txt)
- Get it: https://echoloc.ai/developers?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- Request: `GET https://api.echoloc.ai/api/corporate/v1/companies`
- API key: with the plan, on https://echoloc.ai/developers?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- Its API docs: https://api.echoloc.ai/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing#/corporate/get_company_by_domain_api_corporate_v1_companies_get
- Sold by: Echoloc (https://echoloc.ai?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing)
- Checked: 2026-11-08

## 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: Search Companies By Technologies · List Technologies · List Countries · List Industries

## Overage

- Units cap: hard

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: It goes beyond front-end tools detectable from websites — backend, data infrastructure, cloud, AI tooling, and business systems — and tracks the direction of change: what companies are adopting, evaluating, and replacing.

## Data

- Freshness: 1 day
- Keep data: no limit
- Use data: You may use Echoloc data for: B2B sales prospecting and lead generation, Market research and competitive analysis, Investment research, Building products via our API (with an API subscription). You may NOT: Use the data to make employment decisions about individuals, Scrape, resell, or redistribute raw data without an API agreement, Attempt to identify or contact individual job applicants, Use the service for any illegal purpose, Reverse-engineer our systems or circumvent rate limits, Access the service with bots, scripts, or other automated means outside our official API. [...] You may integrate our data into your product (whitelabel) under your API agreement

## Plan

- Pay: $0
- You get: 100 requests a month
- Enough for: 100 calls a month
- Expires: resets on the 1st of each month

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: domain
- Method: GET
- Path: /api/corporate/v1/companies

## About the plan

- Plan: Beta
- Who can get it: anyone who signs up for a free account: its key is waiting in the app under API

## The 9 fields the plan's answer can hold

company ID, name, domain, technologies, technology usage count, technologies in use, technologies adopting, technologies replacing, technologies evaluating

## Echoloc's plans (2)

- [Echoloc, free](https://datacircle.dev/company-technology-apis/echoloc/free/llms.txt): $0.00 per 1,000, 8% complete, 1 day
- [Echoloc, contact us](https://datacircle.dev/company-technology-apis/echoloc/contact-us/llms.txt): 8% complete, 1 day

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

- `GET /api/corporate/v1/companies`: [Echoloc, free](https://datacircle.dev/company-technology-apis/echoloc/free/llms.txt)

## Echoloc's APIs (3)

- [Echoloc: company discovery API pricing, 2 plans](https://datacircle.dev/company-discovery-apis/echoloc/free/llms.txt)
- [Echoloc: company enrichment API pricing, 2 plans](https://datacircle.dev/company-enrichment-apis/echoloc/free/llms.txt)
- [Echoloc: tech stack API pricing, 2 plans](https://datacircle.dev/company-technology-apis/echoloc/free/llms.txt)

## Echoloc: tech stack API alternatives

- [JobsPipe, free, GET /v1/companies/{key}/technologies](https://datacircle.dev/company-technology-apis/jobspipe/free-get-v1-companies-key-technologies/llms.txt): $0.00 per 1,000, 31% complete, 6 hours
- [DetectZeStack, free, GET /analyze](https://datacircle.dev/company-technology-apis/detectzestack/free-get-analyze/llms.txt): $0.00 per 1,000, 23% complete, 24 hours
- [Botoi, free](https://datacircle.dev/company-technology-apis/botoi/free/llms.txt): $0.00 per 1,000, 23% complete, live
- [upAPI, free](https://datacircle.dev/company-technology-apis/upapi/free/llms.txt): $0.00 per 1,000, 23% 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 2026-11-08.

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