Feedly

Feedly is an AI-powered intelligence platform that helps users track topics, trends, and competitors across various sources. It offers solutions for market intelligence, threat intelligence, and a personal news reader, enabling users to collect, analyze, and share insights through dashboards, automated newsletters, and integrations.

Feedly is primarily an RSS reader and intelligence gathering platform, which aligns with the core concept of saving and organizing web content. It allows users to follow various sources (websites, newsletters, social media) and organize them into feeds/boards, which is similar to lists and sections. It supports previews of content and offers sharing capabilities. While it doesn't explicitly mention 'Tufte-style side notes,' it does have 'Notes and Highlights' for articles, which serves a similar purpose of adding context. The interface is clean, and it supports user accounts and mobile access. However, its focus is more on news aggregation and AI-driven intelligence rather than simple URL curation with rich inline previews and contextual side notes as the primary value proposition.