Refinitiv Workspace is an authoritative source for Venture Capital and Private Equity information.
It includes information on VC and PE companies and funds, portfolio companies and broad industry data.
Coverage starts in 1970 but details can vary. Emphasis is on the US but it does have international coverage.
PitchBook has extensive information on all aspects of venture capital and private equity investment. It includes information on investment in public and private companies and investments by venture and private equity funds.
Chicago Booth students have access to Preqin and CB Insights, two other sources for VC and PE information. Access is through the A-Z Career Services Databases page on the Chicago Booth Intranet.