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Coresignal

Coresignal

85

B2B data API with 3B+ records on companies, employees, and jobs — bulk search, collect, and enrich with multi-source firmographic and professional data.

API KeyFreemiumJSONBot Blocking: NoneNo CCb2b-datacompany-dataemployee-datajob-postingsfirmographicsbulk-queriesmcp-server

Pros

  • + Massive scale — 3B+ records across companies, employees, and jobs with regular freshness updates
  • + Official MCP server for direct LLM/agent integration with multi-source company, employee, and jobs APIs
  • + Clean REST API with simple API key auth, Elasticsearch DSL support for complex queries, and bulk collect endpoints

Cons

  • - No free ongoing tier — free trial is 14 days only, paid plans start at $49/mo with limited credits
  • - Raw data may require preprocessing (duplicates, HTML artifacts, inconsistent formatting from web-scraped sources)

Integration

example.py
import requests
API_KEY = "your-api-key"BASE = "https://api.coresignal.com/cdapi/v2"headers = {"apikey": API_KEY, "accept": "application/json"}
# Collect company by IDresp = requests.get(f"{BASE}/company_base/collect/12345", headers=headers)print(resp.json())
# Search companiesresp = requests.post(f"{BASE}/company_base/search", headers=headers,    json={"name": "Anthropic", "country": "United States"})print(resp.json())
Documentation Website

Details

Category
Company Search
Pricing
Freemium
Free Tier
14-day free trial: 200 Collect credits + 400 Search credits, no credit card required
Rate Limit
18 req/s (collect), 54 req/s (bulk POST), 27 req/s (bulk GET)
Verified
2026-03-31

Score Breakdown

Base +50
OpenAPI Spec (No) 0
Auth Complexity (API Key) +10
Response Format (JSON) +10
Bot Blocking (None) +10
No Credit Card (Yes) +5
Completely Free (No) 0
Total 85

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