# Signalbase, free: Company enrichment API

> Submit company lists for enrichment with funding, acquisition, hiring, job change, and investor intelligence

Signalbase's company enrichment API on its 7-day trial plan. It costs $0.00 per 1,000 companies. It returns 4 of the 13 key fields we check: Industry, Employees, Headquarters, Funding.
We rank 843 plans by price. [Extruct's $49 monthly plan](https://datacircle.dev/company-enrichment-apis/extruct/49-monthly/llms.txt) costs the least per 1,000 companies. Extruct's company enrichment API costs nothing beyond the plan price.
[GetProspect](https://datacircle.dev/company-enrichment-apis/getprospect/49-monthly-starter-post-v2-companies-enrich/llms.txt), [ScrapeUnblocker](https://datacircle.dev/company-enrichment-apis/scrapeunblocker/pay-as-you-go-pay-as-you-go-post-companies-crunchbase/llms.txt) and [Hunter](https://datacircle.dev/company-enrichment-apis/hunter/299-monthly/llms.txt) are the best company enrichment API providers in our benchmark.

- This page: https://datacircle.dev/company-enrichment-apis/signalbase/free
- [Best company enrichment API in 2026](https://datacircle.dev/best-company-enrichment-api.txt)
- Get it: https://www.trysignalbase.com/pricing
- Request: `POST https://www.trysignalbase.com/api/v2/csv-enrichment`
- API key: with the plan, on https://www.trysignalbase.com/pricing
- Its API docs: https://docs.trysignalbase.com/api-reference/csv-enrichment/endpoint/post
- Sold by: Signalbase (https://www.trysignalbase.com)
- Checked: 2026-10-26

## In the answer

- Completeness: 31%
- Industry: ✓
- Employees: ✓
- Headquarters: ✓
- Funding: ✓

## Price

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

## Aggregators

- Aggregators: none

## Charges

- Also pays for: from the same budget: Get Funding Signals · Get Acquisition Signals · Get Job Change Signals · Get Hiring Signals · Get Investors · Get Companies · Search People · Successful webhook delivery

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Submit company lists for enrichment with funding, acquisition, hiring, job change, and investor intelligence

## Data

- Freshness: stored
- Keep data: no API terms
- Use data: “Not on the €99 plan, whose terms are own-use only. Redistribution and white-label API access are licensed separately, sized to your volume and scope in a conversation.”

## Plan

- Pay: $0
- You get: 500 credits
- Enough for: 500,000 results, once
- Expires: 7 days

## Rate limit

- Batch: 1,000

## Speed

- Answer: in the call or by polling
- Median: 22.19 s

## The call

- You send: companies, one of companies[].company_name, companies[].website_url or companies[].linkedin_url. Optional: fileName, wait, timeout
- Method: POST
- Path: /csv-enrichment

## About the plan

- Plan: 7-day trial
- Who can get it: smaller recruitment agencies and solo recruiters running their own business development

## The 30 fields the plan's answer can hold

job ID, detected mapping, status, companies processed, companies total, submitted at, completed at, total inputs, matched count, unmatched count, companies with funding signals, companies with acquisition signals, companies with hiring signals, companies with job change signals, input, matched, company ID, name, domain, industry, country, employee count, funding signals, acquisition signals, hiring signals, job change signals, investor signals, next cursor, credits used, credits remaining

## Signalbase's plans (3)

- [Signalbase, free](https://datacircle.dev/company-enrichment-apis/signalbase/free/llms.txt): $0.00 per 1,000, 31% complete, stored
- [Signalbase, €99 monthly](https://datacircle.dev/company-enrichment-apis/signalbase/99-monthly/llms.txt): $0.056 per 1,000, 31% complete, stored
- [Signalbase, contact us](https://datacircle.dev/company-enrichment-apis/signalbase/contact-us/llms.txt): 31% complete, stored

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

- `POST /csv-enrichment`: [Signalbase, free](https://datacircle.dev/company-enrichment-apis/signalbase/free/llms.txt)

## Signalbase's APIs (6)

- [Signalbase: company discovery API pricing, 3 plans](https://datacircle.dev/company-discovery-apis/signalbase/free/llms.txt)
- [Signalbase: company enrichment API pricing, 3 plans](https://datacircle.dev/company-enrichment-apis/signalbase/free/llms.txt)
- [Signalbase: people search API pricing, 3 plans](https://datacircle.dev/people-search-apis/signalbase/free/llms.txt)
- [Signalbase: company funding API pricing, 3 plans, POST /csv-enrichment](https://datacircle.dev/company-funding-apis/signalbase/free-7-day-trial-post-csv-enrichment/llms.txt)
- [Signalbase: company funding API pricing, 3 plans, GET /signals/funding](https://datacircle.dev/company-funding-apis/signalbase/free-7-day-trial-get-signals-funding/llms.txt)
- [Signalbase: job postings API pricing, 3 plans, POST /csv-enrichment](https://datacircle.dev/job-posting-apis/signalbase/free-7-day-trial-post-csv-enrichment/llms.txt)
- [Signalbase: job postings API pricing, 3 plans, GET /signals/hiring](https://datacircle.dev/job-posting-apis/signalbase/free-7-day-trial-get-signals-hiring/llms.txt)
- [Signalbase: leadership change API pricing, 3 plans, POST /csv-enrichment](https://datacircle.dev/leadership-change-apis/signalbase/free-7-day-trial-post-csv-enrichment/llms.txt)
- [Signalbase: leadership change API pricing, 3 plans, GET /signals/job-changes](https://datacircle.dev/leadership-change-apis/signalbase/free-7-day-trial-get-signals-job-changes/llms.txt)

## Signalbase: company enrichment API alternatives

- [SalesQL, $79 monthly](https://datacircle.dev/company-enrichment-apis/salesql/79-monthly/llms.txt): $0.01 per 1,000, 46% complete, stored
- [Argorant, $149 monthly](https://datacircle.dev/company-enrichment-apis/argorant/149-monthly/llms.txt): $0.058 per 1,000, 23% complete, stored
- [JobDataLake, $400 pack](https://datacircle.dev/company-enrichment-apis/jobdatalake/400-pack/llms.txt): $0.10 per 1,000, 23% complete, stored
- [Geekflare, $3,492 yearly, Business (yearly), POST /brand, Brand](https://datacircle.dev/company-enrichment-apis/geekflare/3492-yearly-business-yearly-post-brand-brand/llms.txt): $0.291 per 1,000, 62% complete, stored

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-10-26.

- https://docs.trysignalbase.com/api-reference/csv-enrichment/endpoint/post.md
- https://docs.trysignalbase.com/api-reference/csv-enrichment/introduction
- https://docs.trysignalbase.com/api-reference/monitors/introduction
- https://docs.trysignalbase.com/index.md
- https://docs.trysignalbase.com/llms.txt
- https://www.trysignalbase.com
- https://www.trysignalbase.com/llms.txt
- https://www.trysignalbase.com/pricing