We started out with Insightly (a Google app); we now use Active Campaign. Insightly is a good starter, as it used to be free for two people. We upgraded to Active Campaign when we wanted to start a newsletter and marketing drip systems. None of them are specific to raising money (nor is there one that we know of).
However, there are some Investor Management Platforms that have some limited CRM capabilities.
Here are some links:
Investor Deal Room (https://investordealroom.com)