# ApiOne, free: Tech stack API

> Fetches the company's homepage and headers and reports the technologies actually present (CMS, analytics, CDN, frameworks, payments, marketing tools), each with the evidence that revealed it.

ApiOne's tech stack API on its Free plan. It costs $0.00 per 1,000 companies. ApiOne's docs list 3 of the 13 fields on our checklist: Technology, Categories, When and where seen.
We haven't run ApiOne through [our tech stack API benchmark](https://datacircle.dev/best-tech-stack-api.txt) yet.
This plan is free. We rank 384 plans for tech stack APIs by price. Half the plans cost $5.00 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), [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/apione/free
- [Tech stack API: find a company's technologies](https://datacircle.dev/best-tech-stack-api.txt)
- Get it: https://apione.store/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing#pricing
- Request: `POST https://api.apione.store/api/v1/tech/detect`
- API key: with the plan, on https://apione.store/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing#pricing
- Its API docs: https://apione.store/endpoints/tech-stack-detection?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- Sold by: ApiOne (https://apione.store?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: Company enrichment · Company search · People enrichment · People search · Email finder · Email verification · Business signals · Hiring signals · Arabic/English name matching · Company name normalization · Signal Watch

## Overage

- Units cap: hard

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Fetches the company's homepage and headers and reports the technologies actually present (CMS, analytics, CDN, frameworks, payments, marketing tools), each with the evidence that revealed it.

## Data

- Freshness: live
- Keep data: no limit
- Use data: Permitted use: Enriching company records in your CRM, sales tools, or internal databases. Finding and verifying professional email addresses for legitimate business outreach. Detecting the technology stack of companies you are targeting for sales or partnership. Identifying hiring and growth signals to prioritise outreach. Building internal sales, recruiting, or GTM tools for your organisation. Integrating ApiOne data into your own SaaS product to enrich your customers' records. Academic or market research using aggregated, anonymised outputs. Prohibited use: Reselling raw data: You may not resell, license, or distribute raw API responses as a standalone data product or data feed to third parties. Competitive use: You may not use ApiOne to build a competing B2B data enrichment API or data provider service. Reverse engineering: You may not attempt to extract, reverse-engineer, or reconstruct our underlying data sources or AI models. Spam: You may not use email addresses returned by ApiOne for bulk unsolicited spam campaigns. All outreach must comply with CAN-SPAM, GDPR, and applicable local law. Illegal targeting: You may not use ApiOne to identify, profile, or contact individuals for discriminatory, harassing, or unlawful purposes. Key sharing: You may not share your API key with users or organisations outside your company. Automation abuse: You may not use automated scripts to deliberately exceed your plan's rate limits or probe system limits. Account circumvention: You may not register multiple free accounts to bypass credit limits.

## Plan

- Pay: $0
- You get: 100 credits a month
- Enough for: 25 calls a month
- Expires: reset monthly, credits cannot be accumulated

## Rate limit

- Per second: 0.5
- Concurrent: 1
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: domain
- Method: POST
- Path: /tech/detect

## About the plan

- Plan: Free
- Who can get it: anyone

## The 8 fields the plan's answer can hold

technologies, technology name, technology category, technology confidence, technology evidence, fetched, final URL, detection confidence

## ApiOne's plans (4)

- [ApiOne, free](https://datacircle.dev/company-technology-apis/apione/free/llms.txt): $0.00 per 1,000, 23% complete, live
- [ApiOne, $49 monthly](https://datacircle.dev/company-technology-apis/apione/49-monthly/llms.txt): $39.20 per 1,000, 23% complete, live
- [ApiOne, $149 monthly](https://datacircle.dev/company-technology-apis/apione/149-monthly/llms.txt): $23.84 per 1,000, 23% complete, live
- [ApiOne, $499 monthly](https://datacircle.dev/company-technology-apis/apione/499-monthly/llms.txt): $19.96 per 1,000, 23% complete, live

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

- `POST /tech/detect`: [ApiOne, free](https://datacircle.dev/company-technology-apis/apione/free/llms.txt)

## ApiOne's APIs (8)

- [ApiOne: company discovery API pricing, 4 plans](https://datacircle.dev/company-discovery-apis/apione/free/llms.txt)
- [ApiOne: company enrichment API pricing, 4 plans](https://datacircle.dev/company-enrichment-apis/apione/free/llms.txt)
- [ApiOne: company open jobs API pricing, 4 plans](https://datacircle.dev/company-open-job-apis/apione/free/llms.txt)
- [ApiOne: tech stack API pricing, 4 plans](https://datacircle.dev/company-technology-apis/apione/free/llms.txt)
- [ApiOne: email verification API pricing, 4 plans](https://datacircle.dev/validate-email-apis/apione/free/llms.txt)
- [ApiOne: email finder API pricing, 4 plans](https://datacircle.dev/find-email-apis/apione/free/llms.txt)
- [ApiOne: people search API pricing, 4 plans](https://datacircle.dev/people-search-apis/apione/free/llms.txt)
- [ApiOne: people enrichment API pricing, 4 plans](https://datacircle.dev/person-enrichment-apis/apione/free/llms.txt)

## ApiOne: tech stack API alternatives

- [Anysite, $1,199 monthly](https://datacircle.dev/company-technology-apis/anysite/1199-monthly/llms.txt): $19.983 per 1,000, 54% complete, live
- [WebReveal, $19.99 monthly](https://datacircle.dev/company-technology-apis/webreveal/19-99-monthly/llms.txt): $19.99 per 1,000, 15% complete, live
- [RichAPI, $100 pack, Starter, POST /web_tech_stack](https://datacircle.dev/company-technology-apis/richapi/100-pack/llms.txt): $20.00 per 1,000, 8% complete, live
- [RankParse, top-up from $1](https://datacircle.dev/company-technology-apis/rankparse/top-up-from-1/llms.txt): $20.00 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 2026-11-07.

- https://apione.store?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://apione.store/acceptable-use?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://apione.store/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://apione.store/endpoints/tech-stack-detection?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://apione.store/llms.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://apione.store/mcp?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://apione.store/refund?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://apione.store/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing