While LightBurn is for lasers, many ArtCAM users only used ArtCAM to engrave (not cut). If your workflow is "import vector > engrave text/photos," LightBurn is faster and cheaper.
Trying to use pure CAD software (SolidWorks, Fusion 360 without sculpting) – they are terrible at organic relief modeling. autodesk artcam alternative
Aspire is widely considered the primary alternative to ArtCAM for high-end artistic CNC machining. While LightBurn is for lasers, many ArtCAM users
Blender is the world's most powerful free 3D modeling software. By installing the BlenderCAM plugin (free), you convert Blender into a CNC toolpath generator. While LightBurn is for lasers