Completely different, although both very nice small companies to do business with.

BrowZine provides an institution-customized mobile-app based product for patrons to browse the latest issues of scholarly journals for which you have the full text, making for a nice common "table of contents" interface across all of the different publishers, and each user has their own account to create their favorites list as a custom "bookshelf".

They recently released a more generic web interface for browsing in the same way, just the latest 5 years. You provide them with the list of what journals on what platforms you have full text rights to.

ReadCube is the company that has the contract with Nature Publishing Group to make it possible for you to purchase on-demand individual articles from the various Nature journals directly on Nature's own website. They offer different price models depending on whether you want your patrons to be able to print/download the article or just read it directly in the browser, and for just a day or for that patron to "keep" it.

We are very happy customers of both of these companies.