In India, there are numerous angel platforms like IAN, Mumbai Angels, Hyderabad Angels, etc, that help start-ups connect with angel investors.
There are some online platforms as well, like – Let’sVenture | Startup Funding Made Easy.
A number of events organized by TiE, etc.also help entrepreneurs connect with investors.
A number of accelerators & incubators also facilitate interactions with investors, for their start-ups.
Here is a list of some acclaimed international ones-