# Funding Signals, free: Tech stack API

> What a company's own site is built on

Funding Signals's tech stack API on its Free plan. It costs $0.00 per 1,000 companies. Funding Signals's docs list 2 of the 13 key fields we check: Technology, Categories.
We haven't run Funding Signals 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/funding-signals/free
- [Tech stack API: find a company's technologies](https://datacircle.dev/best-tech-stack-api.txt)
- Get it: https://fundingsignals.net/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- Request: `POST https://fundingsignals.net/v1/signals/{signal_id}/tech-stack`
- API key: with the plan, on https://fundingsignals.net/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- Its API docs: https://fundingsignals.net/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- Sold by: Funding Signals (https://fundingsignals.net?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing)
- Checked: 2026-11-06

## In the answer

- Completeness: 15%
- Technology: ✓
- Categories: ✓

## Price

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

## Aggregators

- Aggregators: none

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: What a company's own site is built on

## Data

- Freshness: live
- Keep data: no limit
- Use data: Your subscription grants a limited, non-exclusive, non-transferable right to use the API output for your internal business purposes and permitted outreach. You agree not to: exceed, circumvent, or attempt to circumvent plan rate limits or quotas, resell, sublicense, or redistribute the raw API responses as a competing data product without a separate written agreement, use the data to send unsolicited communications in violation of applicable anti-spam laws (e.g. CAN-SPAM, GDPR/ePrivacy) — you are solely responsible for your own outreach compliance, use the Service for any unlawful, harassing, or discriminatory purpose, attempt to gain unauthorized access to the Service, its infrastructure, or other customers' data.

## Plan

- Pay: $0
- You get: 1,500 requests a month

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: signal_id. Optional: refresh
- Method: POST
- Path: /v1/signals/{signal_id}/tech-stack

## About the plan

- Plan: Free
- Who can get it: anyone

## The 3 fields the plan's answer can hold

technology name, technology category, technologies fetched at

## Funding Signals's plans (16)

- [Funding Signals, free](https://datacircle.dev/company-technology-apis/funding-signals/free/llms.txt): $0.00 per 1,000, 15% complete, live
- [Funding Signals, $1 pack, Pay as you go, $1 pack of Pro credits](https://datacircle.dev/company-technology-apis/funding-signals/1-pack-pay-as-you-go-1-pack-of-pro-credits/llms.txt): 15% complete, live
- [Funding Signals, $1 pack, Pay as you go, $1 pack of Starter credits](https://datacircle.dev/company-technology-apis/funding-signals/1-pack-pay-as-you-go-1-pack-of-starter-credits/llms.txt): 15% complete, live
- [Funding Signals, $5 pack, Pay as you go, $5 pack of Pro credits](https://datacircle.dev/company-technology-apis/funding-signals/5-pack-pay-as-you-go-5-pack-of-pro-credits/llms.txt): 15% complete, live
- [Funding Signals, $5 pack, Pay as you go, $5 pack of Starter credits](https://datacircle.dev/company-technology-apis/funding-signals/5-pack-pay-as-you-go-5-pack-of-starter-credits/llms.txt): 15% complete, live
- [Funding Signals, $10 pack, Pay as you go, $10 pack of Pro credits](https://datacircle.dev/company-technology-apis/funding-signals/10-pack-pay-as-you-go-10-pack-of-pro-credits/llms.txt): 15% complete, live
- [Funding Signals, $10 pack, Pay as you go, $10 pack of Starter credits](https://datacircle.dev/company-technology-apis/funding-signals/10-pack-pay-as-you-go-10-pack-of-starter-credits/llms.txt): 15% complete, live
- [Funding Signals, $25 pack, Pay as you go, $25 pack of Pro credits](https://datacircle.dev/company-technology-apis/funding-signals/25-pack-pay-as-you-go-25-pack-of-pro-credits/llms.txt): 15% complete, live
- [Funding Signals, $25 pack, Pay as you go, $25 pack of Starter credits](https://datacircle.dev/company-technology-apis/funding-signals/25-pack-pay-as-you-go-25-pack-of-starter-credits/llms.txt): 15% complete, live
- [Funding Signals, $50 pack, Pay as you go, $50 pack of Pro credits](https://datacircle.dev/company-technology-apis/funding-signals/50-pack-pay-as-you-go-50-pack-of-pro-credits/llms.txt): 15% complete, live
- [Funding Signals, $50 pack, Pay as you go, $50 pack of Starter credits](https://datacircle.dev/company-technology-apis/funding-signals/50-pack-pay-as-you-go-50-pack-of-starter-credits/llms.txt): 15% complete, live
- [Funding Signals, $100 pack, Pay as you go, $100 pack of Pro credits](https://datacircle.dev/company-technology-apis/funding-signals/100-pack-pay-as-you-go-100-pack-of-pro-credits/llms.txt): 15% complete, live
- [Funding Signals, $100 pack, Pay as you go, $100 pack of Starter credits](https://datacircle.dev/company-technology-apis/funding-signals/100-pack-pay-as-you-go-100-pack-of-starter-credits/llms.txt): 15% complete, live
- [Funding Signals, $99 monthly](https://datacircle.dev/company-technology-apis/funding-signals/99-monthly/llms.txt): 15% complete, live
- [Funding Signals, $299 monthly](https://datacircle.dev/company-technology-apis/funding-signals/299-monthly/llms.txt): 15% complete, live
- [Funding Signals, $499 monthly](https://datacircle.dev/company-technology-apis/funding-signals/499-monthly/llms.txt): 15% complete, live

## Funding Signals's calls for this API (1)

- `POST /v1/signals/{signal_id}/tech-stack`: [Funding Signals, free](https://datacircle.dev/company-technology-apis/funding-signals/free/llms.txt)

## Funding Signals's APIs (5)

- [Funding Signals: company discovery API pricing, 16 plans](https://datacircle.dev/company-discovery-apis/funding-signals/free/llms.txt)
- [Funding Signals: company open jobs API pricing, 16 plans](https://datacircle.dev/company-open-job-apis/funding-signals/free/llms.txt)
- [Funding Signals: tech stack API pricing, 16 plans](https://datacircle.dev/company-technology-apis/funding-signals/free/llms.txt)
- [Funding Signals: company funding API pricing, 16 plans, GET /v1/signals/{signal_id}/history](https://datacircle.dev/company-funding-apis/funding-signals/free-get-v1-signals-signal-id-history/llms.txt)
- [Funding Signals: company funding API pricing, 16 plans, GET /v1/signals/{signal_id}](https://datacircle.dev/company-funding-apis/funding-signals/free-get-v1-signals-signal-id/llms.txt)
- [Funding Signals: company enrichment API pricing, 16 plans, POST /v1/signals/{signal_id}/find-company-info](https://datacircle.dev/company-enrichment-apis/funding-signals/free-post-v1-signals-signal-id-find-company-info/llms.txt)
- [Funding Signals: company enrichment API pricing, 16 plans, GET /v1/signals/{signal_id}/lead](https://datacircle.dev/company-enrichment-apis/funding-signals/free-get-v1-signals-signal-id-lead/llms.txt)

## Funding Signals: tech stack API alternatives

- [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
- [RichAPI, free, Sandbox, POST /web_tech_stack](https://datacircle.dev/company-technology-apis/richapi/free/llms.txt): $0.00 per 1,000, 8% complete, live
- [Strale, free trial credits, POST /v1/do, Company Tech Stack](https://datacircle.dev/company-technology-apis/strale/free-trial-credits-post-v1-do-company-tech-stack/llms.txt): $0.00 per 1,000, 8% 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://fundingsignals.net?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://fundingsignals.net/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://fundingsignals.net/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://fundingsignals.net/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing