# Vainu, free: Tech stack API

> Technologies the company uses or has been linked with.

Vainu's tech stack API on its API trial plan. It costs $0.00 per 1,000 companies. It returns 1 of the 13 key fields we check: Technology.
Vainu limits how many calls you get but gives no number.
We haven't run Vainu through [our tech stack API benchmark](https://datacircle.dev/best-tech-stack-api.txt) yet.
This plan is free. We rank 310 plans for tech stack APIs by price. Half the plans cost $8.90 per 1,000 companies or less.
[Botoi's $199 monthly plan](https://datacircle.dev/company-technology-apis/botoi/199-monthly/llms.txt) is the cheapest paid plan per 1,000 companies: as little as $0.0066. Botoi's $199 monthly plan covers up to 1,000,000 companies a day.
[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 Botoi's $199 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/vainu/free
- [Tech stack API: find a company's technologies](https://datacircle.dev/best-tech-stack-api.txt)
- Get it: https://developers.vainu.com/docs/vainu-api-trial?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- Request: `POST https://api.vainu.io/api/v3/organizations/`
- API key: with the plan, on https://developers.vainu.com/docs/vainu-api-trial?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- Its API docs: https://developers.vainu.com/reference/api_v3_organizations_create?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- Sold by: Vainu (https://www.vainu.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing)
- Checked: 2026-11-02

## In the answer

- Completeness: 8%
- Technology: ✓

## Price

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

## Aggregators

- Aggregators: none

## Charges

- Also pays for: nothing else

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Technologies the company uses or has been linked with.

## Data

- Freshness: 1 day
- Keep data: no API terms
- Use data: no API terms

## Plan

- Pay: $0

## Rate limit

- Concurrent: 1
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: query, fields "technology_data", database. Optional: limit, offset, order, is_active, unwind_subdocument, unwind_subdocument_query, unwind_subdocument_limit, unwind_subdocument_offset, aggregation, lookup
- Method: POST
- Path: /api/v3/organizations/

## About the plan

- Plan: API trial
- Who can get it: anyone who requests a free trial token (valid 30 days)

## The 4 fields the plan's answer can hold

business ID, company name, domain, technologies

## Vainu's plans (4)

- [Vainu, free](https://datacircle.dev/company-technology-apis/vainu/free/llms.txt): $0.00 per 1,000, 8% complete, 1 day
- [Vainu, €5,004 yearly](https://datacircle.dev/company-technology-apis/vainu/5004-yearly/llms.txt): 8% complete, 1 day
- [Vainu, €6,996 yearly](https://datacircle.dev/company-technology-apis/vainu/6996-yearly/llms.txt): 8% complete, 1 day
- [Vainu, contact us](https://datacircle.dev/company-technology-apis/vainu/contact-us/llms.txt): 8% complete, 1 day

## Vainu's calls (1)

- `POST /api/v3/organizations/`: [Vainu, free](https://datacircle.dev/company-technology-apis/vainu/free/llms.txt)

## Vainu's APIs (2)

- [Vainu: company discovery API pricing, 4 plans](https://datacircle.dev/company-discovery-apis/vainu/free/llms.txt)
- [Vainu: tech stack API pricing, 4 plans](https://datacircle.dev/company-technology-apis/vainu/free/llms.txt)

## Vainu: 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
- [StackPeek, free](https://datacircle.dev/company-technology-apis/stackpeek/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 2026-11-02.

- https://developers.vainu.com/docs/data-reference.md?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://developers.vainu.com/docs/filtering-company-data.md?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://developers.vainu.com/docs/quick-start.md?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://developers.vainu.com/docs/vainu-api-trial.md?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://developers.vainu.com/recipes/technology-search-shopify.md?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://developers.vainu.com/reference/api_v3_organizations_create.md?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://www.vainu.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://www.vainu.com/delivery/headless?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://www.vainu.com/legal-stuff/service-description?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://www.vainu.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing