Readwise is a company whose namesake service helps people revisit and learn from their highlights and annotations. It syncs highlights from Kindle, Instapaper, Apple Books and other sources and surfaces the best of them through a daily email and app. Readwise is free for the first 30 days; as of November 2026, its pricing page lists Full Readwise at $9.99 per month billed yearly, alongside Highlights Only, Highlights Lite Only and Reader Only plans.
Readwise says it uses 📝Spaced Repetition to resurface users' best highlights at the right times. Its homepage now presents the company's products under three entries, Books, Highlights and Reader. Reader is a read-it-later app for the full content of articles, PDFs, EPUBs, email newsletters and RSS feeds, and Readwise Books is a book app for buying, reading and tracking books. Ghostreader answers questions about a user's highlights and shows the highlights each answer came from. Readwise's 📝MCP integration gives any MCP-compatible AI access to a user's library, and a CLI and API let users search, read and organize that library from the terminal. On its Reader page the company says it has been bootstrapped and profitable since 2017, funded by subscribers rather than venture capital.