I am currently working on and beta testing an app called Malak. It is an opensource version of Visible VC/Carta/Angelist. as a previous founder, toolings to send and manage investors' updates, decks, fundraising and others were ridiculously expensive and now I have built one completely open sourced but I have an hosted cloud version.
Product live at https://malak.vc OSS source code at https://github.com/ayinke-llc/malak