0% Google, 100% open source.
Use the free and open source OpenStreetMaps API to display your Events Manager Location Maps. Existing locations should work right out-of-the-box.
This plugin completely replaces the original Google Maps API (paid) with the 100% free OpenStreetMaps API.
Once installed and activated, this plugin will automatically disable the Google Maps integration in Events Manager for you and replace it with OpenStreetMaps. You do not have to change anything in your code as it simply replaces #_LOCATIONMAP and . and front-end Event & Location submission forms.
You only need one, free OpenCage API key.
It has a daily limit of 2500 calls per day, so you should be okay, because it is only called when adding or editing a location or editing an event.
Type: WordPress Plugin
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Events Manager – OpenStreetMaps