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OpenCorporates - https://opencorporates.com
- Description: Largest open database of companies in the world
- Category: company-research
- Tags: companies, database, corporate
- Free: true
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Crunchbase - https://www.crunchbase.com
- Description: Platform for finding business information
- Category: company-research
- Tags: business, startups, funding
- Free: true
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LinkedIn - https://www.linkedin.com
- Description: Professional networking platform
- Category: company-research
- Tags: professional, networking, business
- Free: true
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Glassdoor - https://www.glassdoor.com
- Description: Job and recruiting site with company reviews
- Category: company-research
- Tags: jobs, reviews, salaries
- Free: true
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SEC EDGAR - https://www.sec.gov/edgar
- Description: Electronic Data Gathering, Analysis, and Retrieval system
- Category: company-research
- Tags: sec, filings, financial
- Free: true