Apparently, the chargers will be updated to become dumb terminals that just charge automatically when plugged in, but for many end users, the main reason they went with Juicebox (which was bought by Enel) was that Enel would handle user accounts and billing. I work at an organization where we charge employees at a discounted rate, and the chargers are open to the public to use as well if they install the app and input their payment info. We're going to have to close down public access if we can't find a solution. A couple companies are saying they might be able to take over. Would have been nice to have more than a couple weeks to figure this out!

I'm sure it's technically possible to reverse engineer the software, but there are also "dumb" chargers that require no software or app. They're more reliable and cheaper, and there's no risk of being locked out when a company stops supporting its software.

Open EVSE is the only open source charger I've heard about, but I haven't used their products before.

Open EVSE, but any charger that support OCPP in theory can be controlled by any software. I do not have an OCPP EVSE installed (or any EVSE yet), so no idea if it actually works.