People Search & Public Records
Free database mapping relationships between powerful people and organizations.
Official site: https://littlesis.org
UK government register for searching company filings, officers and persons with significant control.
Company and investor database covering funding rounds, leadership and acquisitions for startups and private companies.
Free US people lookup by name, phone or address.
ICIJ's searchable database of offshore entities and officers from the Panama, Paradise and Pandora Papers and other leaks.