# upAPI, free: Tech stack API

> Analyze any website to detect its technology stack — frameworks (Next.js, Nuxt, WordPress, Shopify), hosting (Vercel, Netlify, AWS), analytics (GA, Plausible, Segment), CDNs, CSS frameworks, payment providers, and more.

upAPI's tech stack API on its Free plan. It costs $0.00 per 1,000 companies. upAPI's docs list 3 of the 13 key fields we check: Technology, Categories, When and where seen.
We haven't run upAPI 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/upapi/free
- [Tech stack API: find a company's technologies](https://datacircle.dev/best-tech-stack-api.txt)
- Get it: https://upapi.io/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- Request: `POST https://api.upapi.io/detect-tech-stack.post`
- API key: with the plan, on https://upapi.io/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- Its API docs: https://upapi.io/apis/developer-tools/detect-tech-stack?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- Sold by: upAPI (https://upapi.io?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing)
- Checked: 2026-11-06

## 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: 1 hour
- Also pays for: from the same budget: 112 other calls

## Overage

- Units cap: hard

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Analyze any website to detect its technology stack — frameworks (Next.js, Nuxt, WordPress, Shopify), hosting (Vercel, Netlify, AWS), analytics (GA, Plausible, Segment), CDNs, CSS frameworks, payment providers, and more.

## Data

- Freshness: live
- Keep data: no limit
- Use data: "You agree not to use the Services to: break the law, infringe anyone's rights, or help someone else do so, transmit malware, attempt to gain unauthorized access to any system, or probe, scan, or test the vulnerability of the Services or any upstream provider without authorization, exceed, evade, or interfere with rate limits, plan quotas, or other technical or usage restrictions, including by sharing or rotating keys to do so, resell, sublicense, or redistribute the Services or your API access except as we expressly allow, place an unreasonable load on, disrupt, or degrade our infrastructure or that of any upstream provider, violate the terms, policies, or rate limits of any upstream API you reach through the gateway, send data you have no lawful right to send, or route sensitive data through an endpoint not intended for it, or misrepresent your identity or your affiliation with any person or organization." "[...] your use of it is also subject to that provider's own terms and policies, which we do not control."

## Plan

- Pay: $0
- You get: 1,000 credits a month
- Enough for: 1,000 calls a month
- Expires: the quota resets at the start of each UTC calendar month

## Rate limit

- Per second: 0.17
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: url
- Method: POST
- Path: /detect-tech-stack.post

## About the plan

- Plan: Free
- Who can get it: anyone

## The 12 fields the plan's answer can hold

url, final URL, server, powered by, status code, content type, technologies, technology category, technology evidence, technology confidence, truncated, fetched at

## upAPI's plans (4)

- [upAPI, free](https://datacircle.dev/company-technology-apis/upapi/free/llms.txt): $0.00 per 1,000, 23% complete, live
- [upAPI, $29 monthly](https://datacircle.dev/company-technology-apis/upapi/29-monthly/llms.txt): $0.29 per 1,000, 23% complete, live
- [upAPI, $99 monthly](https://datacircle.dev/company-technology-apis/upapi/99-monthly/llms.txt): $0.198 per 1,000, 23% complete, live
- [upAPI, $499 monthly](https://datacircle.dev/company-technology-apis/upapi/499-monthly/llms.txt): $0.10 per 1,000, 23% complete, live

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

- `POST /detect-tech-stack.post`: [upAPI, free](https://datacircle.dev/company-technology-apis/upapi/free/llms.txt)

## upAPI's APIs (20)

- [upAPI: SERP API pricing, 4 plans, POST /bing-serp.get](https://datacircle.dev/serp-apis/upapi/free-post-bing-serp-get/llms.txt)
- [upAPI: SERP API pricing, 4 plans, POST /duckduckgo-search.get](https://datacircle.dev/serp-apis/upapi/free-post-duckduckgo-search-get/llms.txt)
- [upAPI: SERP API pricing, 4 plans, POST /google-serp.get](https://datacircle.dev/serp-apis/upapi/free-post-google-serp-get/llms.txt)
- [upAPI: SERP API pricing, 4 plans, POST /google-search.post](https://datacircle.dev/serp-apis/upapi/free-post-google-search-post/llms.txt)
- [upAPI: Bluesky profile API pricing, 4 plans](https://datacircle.dev/bluesky-profile-apis/upapi/free/llms.txt)
- [upAPI: GitHub profile API pricing, 4 plans](https://datacircle.dev/github-profile-apis/upapi/free/llms.txt)
- [upAPI: GitHub repository API pricing, 4 plans](https://datacircle.dev/github-repository-apis/upapi/free/llms.txt)
- [upAPI: search autocomplete API pricing, 4 plans](https://datacircle.dev/search-autocomplete-apis/upapi/free/llms.txt)
- [upAPI: Local business reviews API pricing, 4 plans](https://datacircle.dev/local-business-reviews-apis/upapi/free/llms.txt)
- [upAPI: Local business search API pricing, 4 plans](https://datacircle.dev/local-business-search-apis/upapi/free/llms.txt)
- [upAPI: Hacker News search API pricing, 4 plans](https://datacircle.dev/hacker-news-search-apis/upapi/free/llms.txt)
- [upAPI: Instagram post API pricing, 4 plans](https://datacircle.dev/instagram-post-apis/upapi/free/llms.txt)
- [upAPI: LinkedIn profile API pricing, 4 plans](https://datacircle.dev/linkedin-profile-apis/upapi/free/llms.txt)
- [upAPI: LinkedIn people search API pricing, 4 plans](https://datacircle.dev/linkedin-people-search-apis/upapi/free/llms.txt)
- [upAPI: LinkedIn job details API pricing, 4 plans](https://datacircle.dev/linkedin-job-details-apis/upapi/free/llms.txt)
- [upAPI: LinkedIn job search API pricing, 4 plans](https://datacircle.dev/linkedin-job-search-apis/upapi/free/llms.txt)
- [upAPI: TikTok profile API pricing, 4 plans](https://datacircle.dev/tiktok-profile-apis/upapi/free/llms.txt)
- [upAPI: tech stack API pricing, 4 plans](https://datacircle.dev/company-technology-apis/upapi/free/llms.txt)
- [upAPI: web scraping API pricing, 4 plans](https://datacircle.dev/web-scraping-apis/upapi/free/llms.txt)
- [upAPI: job posting details API pricing, 4 plans](https://datacircle.dev/job-posting-details-apis/upapi/free/llms.txt)
- [upAPI: job postings API pricing, 4 plans, POST /upwork-jobs-search.get](https://datacircle.dev/job-posting-apis/upapi/free-post-upwork-jobs-search-get/llms.txt)
- [upAPI: job postings API pricing, 4 plans, POST /wellfound-browse-jobs.post](https://datacircle.dev/job-posting-apis/upapi/free-post-wellfound-browse-jobs-post/llms.txt)
- [upAPI: company enrichment API pricing, 4 plans](https://datacircle.dev/company-enrichment-apis/upapi/free/llms.txt)
- [upAPI: Instagram profile API pricing, 4 plans, POST /instagram-get-user-by-id.post](https://datacircle.dev/instagram-profile-apis/upapi/free-post-instagram-get-user-by-id-post/llms.txt)
- [upAPI: Instagram profile API pricing, 4 plans, POST /instagram-get-user-profile.post](https://datacircle.dev/instagram-profile-apis/upapi/free-post-instagram-get-user-profile-post/llms.txt)

## upAPI: tech stack API alternatives

- [Botoi, $9 monthly](https://datacircle.dev/company-technology-apis/botoi/9-monthly/llms.txt): $0.03 per 1,000, 23% complete, live
- [Outsend, top-up](https://datacircle.dev/company-technology-apis/outsend/top-up/llms.txt): $1.013 per 1,000, 15% complete, live
- [StackPeek, $29 monthly, Pro, GET /api/v1/detect](https://datacircle.dev/company-technology-apis/stackpeek/29-monthly-pro-get-api-v1-detect/llms.txt): $1.16 per 1,000, 23% complete, live
- [Bright Data, $499 monthly](https://datacircle.dev/company-technology-apis/bright-data/499-monthly/llms.txt): $1.30 per 1,000, 38% 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://upapi.io/apis/developer-tools/detect-tech-stack?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://upapi.io/apis/social-media/linkedin-get-profile?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://upapi.io/docs/plans?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://upapi.io/docs/rate-limits?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://upapi.io/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://upapi.io/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing