Of course, Prusa will be the most open choice aside from something like a Voron kit, but Elegoo, Qidi, etc. will at least be more open than Bambu.
I believe the Elegoo CC uses a modified version of Klipper that isn’t open, so that might be a concern for you. After a bit of searching, I found OpenCentauri, a project that aims to bring an open version of Klipper to the Centauri Carbon: https://docs.opencentauri.cc/
I think Qidi is in a similar boat, but haven’t looked into it.
You might also want to check out Sovol, they make decently open printers too that are more affordable than Prusa.
edit: More searching later, looks like OrcaSlicer will work for both Qidi and the Elegoo CC. However, it does not work on the newer CC2, and the Qidi Box (and presumably the Elegoo Canvas) is also not supported. Something to keep in mind.
Of course, Prusa will be the most open choice aside from something like a Voron kit, but Elegoo, Qidi, etc. will at least be more open than Bambu.
I believe the Elegoo CC uses a modified version of Klipper that isn’t open, so that might be a concern for you. After a bit of searching, I found OpenCentauri, a project that aims to bring an open version of Klipper to the Centauri Carbon: https://docs.opencentauri.cc/
I think Qidi is in a similar boat, but haven’t looked into it.
You might also want to check out Sovol, they make decently open printers too that are more affordable than Prusa.
edit: More searching later, looks like OrcaSlicer will work for both Qidi and the Elegoo CC. However, it does not work on the newer CC2, and the Qidi Box (and presumably the Elegoo Canvas) is also not supported. Something to keep in mind.