Lack of time is one of the typical issues founders face. Contacting investors takes time and is undoubtedly crucial. Since time is ultimately the most valuable resource, I am happy to see a tool that can help entrepreneurs save a significant amount of time.
Crunchbase - Crunchbase is a platform for discovering industry trends, investments, and news about companies around the world.
Investor List - A searchable, crowdsourced list of over 1k investors
CB Insights - CB Insights is a company database for the venture capital and corporate development community.
Investor Hunt - Investor Hunt is the internet’s largest investor database with 40k+ angels and VCs from all over the world.
Owler - Owler is a crowdsourced data model allowing users to follow, track, and research companies.
OpenVC - 2200+ VC firms by thesis to find 'best fit' for your startup