The number of CAD softwares on the market has increased dramatically in the past few years, but Solidworks and Onshape are still the best known.

One useful analogy is to compare Onshape and Solidworks to Google G Suite and Microsoft Office. Brett Goldfarb with Boulder Engineering Studio explains "Solidworks, like Office, is primarily a dedicated application that is installed onto your PC and is often considered a more powerful tool when compared to cloud based alternatives (like G Suite). Onshape, like G Suite, is a cloud based application which requires an internet connection to be run through a browser but has the inherent benefits of existing on a shared access platform." His full article dives into specific differences and implications when sketching.

Essentially, Onshape is slightly simpler and superior when collaboration and ease of access is a priority.