Instapaper

Instapaper is a read-it-later service that allows users to save articles and web pages for offline reading. It provides a clean, optimized text view, organization into folders, and features like highlighting and note-taking. The service is available across multiple devices including iPhone, iPad, Android, and Kindle.

Instapaper is primarily a 'read-it-later' service, which differs from Medium's core value proposition as a publishing platform. While Instapaper allows users to save and read articles in a clean format (akin to a rich text editor), and offers features like highlighting and notes (community feedback tools), audio playback, and mobile access, it lacks the publishing and distribution aspects central to Medium. It does have a premium subscription (membership monetization) and allows for sharing, but it doesn't provide a platform for writers to publish their own content to a broad audience or a recommendation engine for new content discovery in the same way Medium does. The 'search-and-discovery' feature is present for saved articles, but not for discovering new content from a broad pool of writers.