The right alternative depends on whether you are replacing DWG drafting or using the opportunity to move to a product-focused parametric workflow.
If you need to edit customer DWG files with maximum fidelity, a replacement has a different job from a package used to create new parametric mechanical designs. Separate DWG compatibility from general CAD capability before comparing prices.
Fusion combines mechanical CAD with CAM, simulation-oriented workflows and electronics/PCB tools. That breadth makes it particularly useful for small product teams that want fewer hand-offs between separate applications.
View Autodesk Fusion →FreeCAD is a capable zero-licence-cost option for parametric solid modelling, technical drawings and CAM-oriented workflows. Its interface and workbench model can demand more learning than some commercial alternatives.
Visit FreeCAD →Shapr3D is a strong option for fast concept-to-solid modelling, particularly where iPad, pen input or a low-friction interface matters. It supports manufacturing drawings and neutral CAD exchange, but it is not an integrated CAM or PCB platform.
View Shapr3D →AutoCAD LT stays inside the Autodesk/DWG ecosystem while focusing on 2D drafting and documentation. That can be a more rational comparison than moving to a completely different modelling system when 3D mechanical CAD is not required.
For a business, one hour per week of avoidable translation, redrawing or export cleanup can outweigh a licence saving. Test the exact customer files and deliverables before switching.