How to implement a map which shows all branches of a stores/shop using multiple pins?

I want to make a website which shows location pins on multiple location which could change dynamically when the user adds his location. So how to show multiple pins in a map and also customize the design of the UI of the map. Google maps API doesn't support this maybe. Any open source project or video on how to implement this would be helpful. Thanks

Refer image Something like this but want to change icon of pointer pin