1. Website: oysterbooks.com Twitter: @oyster Category: Media and Publishing Competitors: Scribd Model: Ebook reading services Founded: 2013 Oyster is an ebook subscription service application available on the iPhone and iPad. Oyster offers several different reading modes, access to over 100,000 titles, and book recommendations from its editorial staff. Users can also take advantage of highlighting and notes features and share their activities with friends using the platform.