Comment by NoNotTheDuo

I don't think that's quite accurate. If you're using the free license, then everything you create is a public document. Allowing anyone in the world access to that document. Per the EULA[0]:

> 7.2.2 For any Public Document owned by a Free Plan User created on or after August 7, 2018, or any Public Document created prior to that date without a LICENSE tab, Customer grants a worldwide, royalty-free and non-exclusive license to any End User or third party accessing the Public Document to use the intellectual property contained in Customer’s Public Document without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Document, and to permit persons to whom the Document is made available to do the same.

[0]: https://www.onshape.com/en/legal/terms-of-use

Perhaps more importantly, the Free License doesn't allow for any commercial use. If you are designing something for commercial use, then you can, should, and are obligated to, upgrade to a paid license.