Crunchbase - Crunchbase is a platform for discovering industry trends, investments, and news about companies around the world.
Y-Combinator - Y Combinator provides seed funding for startups.
AngelList - Access top deals through investor-led syndicates
Private Equity List - Private equity, venture capital database that focuses on growing sectors in emerging countries and contains contacts of investment professionals.
StartEngine - StartEngine allows everyday people to invest and own shares in startups and early growth companies. The nation's leading equity crowdfunding platform, StartEngine is changing the way entrepreneurs raise capital.
Fundcomb - Freely searchable database of all investor types globally