# ToolTrace, free: Tech stack API

> Identify the technologies powering a public website without maintaining your own detection signatures.

ToolTrace's Free plan for the tech stack API costs $0.00 per 1,000 companies. ToolTrace's docs list 3 of the 13 fields on our checklist: Technology, Categories, When and where seen.
We haven't run ToolTrace through [our tech stack API benchmark](https://datacircle.dev/best-tech-stack-api.txt) yet.
This plan is free. We rank 405 plans for tech stack APIs by price. Half the plans cost $4.99 per 1,000 companies or less. [See how many tech stack API plans are free.](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.
[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), [GetProspect](https://datacircle.dev/company-technology-apis/getprospect/49-monthly/llms.txt) and [DetectZeStack](https://datacircle.dev/company-technology-apis/detectzestack/79-monthly-mega-get-analyze/llms.txt) are the best tech stack API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/company-technology-apis/tooltrace/free
- [Company technologies API: tech stack APIs compared](https://datacircle.dev/best-tech-stack-api.txt)
- Get it: https://tooltrace.io/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- Request: `POST https://api.tooltrace.io/v1/tech-stack`
- API key: with the plan, on https://tooltrace.io/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- Its API docs: https://tooltrace.io/apis/tech-stack-api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- Sold by: ToolTrace (https://tooltrace.io?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

- Also pays for: from the same budget: Check an email address · Check a batch of email addresses · Extract webpage content · Extract page metadata · Extract page links · Extract structured data · Audit webpage SEO · Inspect an XML sitemap and its URLs

## Overage

- Units cap: hard

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Identify the technologies powering a public website without maintaining your own detection signatures.

## Data

- Freshness: live
- Keep data: no limit
- Use data: You may use ToolTrace only for lawful purposes and in line with our Acceptable Use Policy. You must have a lawful basis and any necessary permission to request, store, or process the data you submit. You must respect privacy rights, intellectual property, access restrictions, robots directives, and applicable laws of the jurisdictions whose data you handle. [...] Do not use ToolTrace to access private systems, bypass controls, exploit vulnerabilities, distribute malware, facilitate fraud, impersonate others, harass people, conduct unlawful surveillance, infringe intellectual property, violate privacy rights, create spam, or support phishing.

## Plan

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

## Rate limit

- Per second: 0.17
- Concurrent: 1
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: url. Optional: render, wait_until, wait_for_selector, render_timeout_seconds
- Method: POST
- Path: /v1/tech-stack

## About the plan

- Plan: Free
- Who can get it: anyone aged 16 or over

## The 33 fields the plan's answer can hold

requested URL, final URL, status code, content type, bytes downloaded, fetch time, redirects, cached, render method, render reason, credits used, render stable, stability wait, stability checks, visible words, DOM nodes, network requests, network bytes, blocked requests, JS heap used, warnings, access status, block reason, challenge provider, domain, technologies detected, technology category, technology name, technology website, technology icon, technology confidence, technology evidence, technology version

## ToolTrace's plans (7)

- [ToolTrace, free](https://datacircle.dev/company-technology-apis/tooltrace/free/llms.txt): $0.00 per 1,000, 23% complete, live
- [ToolTrace, $15 pack](https://datacircle.dev/company-technology-apis/tooltrace/15-pack/llms.txt): $1.50 per 1,000, 23% complete, live
- [ToolTrace, $65 pack](https://datacircle.dev/company-technology-apis/tooltrace/65-pack/llms.txt): $1.30 per 1,000, 23% complete, live
- [ToolTrace, $220 pack](https://datacircle.dev/company-technology-apis/tooltrace/220-pack/llms.txt): $1.10 per 1,000, 23% complete, live
- [ToolTrace, $19 monthly](https://datacircle.dev/company-technology-apis/tooltrace/19-monthly/llms.txt): $1.90 per 1,000, 23% complete, live
- [ToolTrace, $59 monthly](https://datacircle.dev/company-technology-apis/tooltrace/59-monthly/llms.txt): $1.686 per 1,000, 23% complete, live
- [ToolTrace, $149 monthly](https://datacircle.dev/company-technology-apis/tooltrace/149-monthly/llms.txt): $1.656 per 1,000, 23% complete, live

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

- `POST /v1/tech-stack`: [ToolTrace, free](https://datacircle.dev/company-technology-apis/tooltrace/free/llms.txt)

## ToolTrace's APIs (3)

- [ToolTrace: tech stack API pricing, 7 plans](https://datacircle.dev/company-technology-apis/tooltrace/free/llms.txt)
- [ToolTrace: web scraping API pricing, 7 plans](https://datacircle.dev/web-scraping-apis/tooltrace/free/llms.txt)
- [ToolTrace: email verification API pricing, 7 plans, POST /v1/verify-email/batch](https://datacircle.dev/validate-email-apis/tooltrace/free-post-v1-verify-email-batch/llms.txt)
- [ToolTrace: email verification API pricing, 7 plans, POST /v1/verify-email](https://datacircle.dev/validate-email-apis/tooltrace/free-post-v1-verify-email/llms.txt)

## ToolTrace: tech stack API alternatives

- [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
- [Siftwright, $299 monthly](https://datacircle.dev/company-technology-apis/siftwright/299-monthly/llms.txt): $1.196 per 1,000, 15% 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 2026-11-07.

- https://api.tooltrace.io/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://api.tooltrace.io/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://tooltrace.io/acceptable-use?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://tooltrace.io/apis?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://tooltrace.io/apis/tech-stack-api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://tooltrace.io/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://tooltrace.io/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://tooltrace.io/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing