# URLpipe, free: Tech stack API

> A Wappalyzer-style lookup over HTTP: one URL in, every technology with its version and the evidence for it out.

URLpipe's Free plan for the tech stack API costs $0.00 per 1,000 companies. URLpipe's docs list 3 of the 13 fields on our checklist: Technology, Categories, When and where seen.
We haven't run URLpipe through [our tech stack API benchmark](https://datacircle.dev/best-tech-stack-api.txt) yet.
This plan is free. We rank 383 plans for tech stack APIs by price. Half the plans cost $6.32 per 1,000 companies or less. [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/urlpipe/free
- [Company technologies API: tech stack APIs compared](https://datacircle.dev/best-tech-stack-api.txt)
- Get it: https://urlpipe.dev/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- Request: `POST https://urlpipe.dev/technologies`
- API key: with the plan, on https://urlpipe.dev/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- Its API docs: https://urlpipe.dev/docs/technologies?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- Sold by: URLpipe (https://urlpipe.dev?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing)
- Checked: 2026-11-07

## In the answer

- Completeness: 23%
- Technology: ✓
- Categories: ✓
- When and where seen: ✓

## Price

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

## Aggregators

- Aggregators: none

## Charges

- Repeat free: 7 days
- Also pays for: from the same budget: HTML · Screenshot · PDF · Markdown · Metadata · Summarize · Keywords · Extract · Lighthouse · Console · Scrape

## Overage

- Units cap: hard

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: A Wappalyzer-style lookup over HTTP: one URL in, every technology with its version and the evidence for it out.

## Data

- Freshness: 7 days
- Keep data: no limit
- Use data: When you submit a URL to URLpipe, you confirm that you have the right to fetch and analyze that page, and to use what the Service returns in the way you intend. You agree not to use the Service to: Violate any applicable law, regulation, or third-party right. Get past authentication, paywalls or other access controls on sites you do not own or have permission to access. Submit content protected by intellectual property rights without authorization. Generate spam, harass others, or distribute malware. Probe, attack, or otherwise abuse the Service or its infrastructure.

## Plan

- Pay: $0
- You get: 1,000 credits a month
- Enough for: 1,000 calls a month
- Expires: at the end of each month

## Rate limit

- Per second: 1
- Concurrent: 1
- Batch: 1

## Speed

- Answer: in the call or by polling

## The call

- You send: url. Optional: sync, report_to, max_age, labels, residential, auth_profile, page_options.wait_for_selector, page_options.scroll_to_bottom, page_options.delay, page_options.block_ads, page_options.block_cookie_banners, page_options.block_popups, page_options.remove_selectors, Idempotency-Key
- Method: POST
- Path: /technologies

## About the plan

- Plan: Free
- Who can get it: anyone who signs up and confirms their email address

## The 14 fields the plan's answer can hold

final URL, technologies, technology name, technology slug, technology version, technology confidence, technology category, technology website, technology description, CPE, technology detection signals, technology implied by, cache state, credits used

## URLpipe's plans (8)

- [URLpipe, free](https://datacircle.dev/company-technology-apis/urlpipe/free/llms.txt): $0.00 per 1,000, 23% complete, 7 days
- [URLpipe, $19 monthly](https://datacircle.dev/company-technology-apis/urlpipe/19-monthly/llms.txt): $0.95 per 1,000, 23% complete, 7 days
- [URLpipe, $49 monthly](https://datacircle.dev/company-technology-apis/urlpipe/49-monthly/llms.txt): $0.891 per 1,000, 23% complete, 7 days
- [URLpipe, $149 monthly](https://datacircle.dev/company-technology-apis/urlpipe/149-monthly/llms.txt): $0.851 per 1,000, 23% complete, 7 days
- [URLpipe, $190 yearly](https://datacircle.dev/company-technology-apis/urlpipe/190-yearly/llms.txt): $0.792 per 1,000, 23% complete, 7 days
- [URLpipe, $490 yearly](https://datacircle.dev/company-technology-apis/urlpipe/490-yearly/llms.txt): $0.742 per 1,000, 23% complete, 7 days
- [URLpipe, $1,490 yearly](https://datacircle.dev/company-technology-apis/urlpipe/1490-yearly/llms.txt): $0.71 per 1,000, 23% complete, 7 days
- [URLpipe, contact us](https://datacircle.dev/company-technology-apis/urlpipe/contact-us/llms.txt): 23% complete, 7 days

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

- `POST /technologies`: [URLpipe, free](https://datacircle.dev/company-technology-apis/urlpipe/free/llms.txt)

## URLpipe's APIs (2)

- [URLpipe: tech stack API pricing, 8 plans](https://datacircle.dev/company-technology-apis/urlpipe/free/llms.txt)
- [URLpipe: web scraping API pricing, 8 plans, POST /html](https://datacircle.dev/web-scraping-apis/urlpipe/free-post-html/llms.txt)
- [URLpipe: web scraping API pricing, 8 plans, POST /markdown](https://datacircle.dev/web-scraping-apis/urlpipe/free-post-markdown/llms.txt)

## URLpipe: tech stack API alternatives

- [Siftwright, $999 monthly](https://datacircle.dev/company-technology-apis/siftwright/999-monthly/llms.txt): $0.666 per 1,000, 15% complete, live
- [Detecto, €19 monthly](https://datacircle.dev/company-technology-apis/detecto/19-monthly/llms.txt): $0.713 per 1,000, 0% complete, live
- [DetectZeStack, $9 monthly, Pro, POST /analyze/batch](https://datacircle.dev/company-technology-apis/detectzestack/9-monthly-pro-post-analyze-batch/llms.txt): $0.90 per 1,000, 23% complete, 24 hours
- [Outsend, top-up](https://datacircle.dev/company-technology-apis/outsend/top-up/llms.txt): $1.013 per 1,000, 15% 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 2026-11-07.

- https://urlpipe.dev?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://urlpipe.dev/docs/caching?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://urlpipe.dev/docs/credits?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://urlpipe.dev/docs/technologies?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://urlpipe.dev/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://urlpipe.dev/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://urlpipe.dev/pricing.md?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://urlpipe.dev/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://urlpipe.dev/website-technology-lookup-api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing