Joplin

Joplin is a professional-grade, open-source knowledge management system designed as a secure alternative to Evernote and Notion. Its technical architecture is built on a local-first principle, storing notes as Markdown files within a SQLite database. This ensures high performance and offline accessibility. Joplin's core differentiator in the 2026 market is its 'Bring Your Own Cloud' (BYOC) philosophy, allowing users to synchronize data via WebDAV, Dropbox, OneDrive, or the proprietary Joplin Cloud. It employs End-to-End Encryption (E2EE) using the SJCL library, ensuring that even sync providers cannot access note content. The platform features a robust plugin ecosystem developed in TypeScript/JavaScript, a Terminal-based CLI version for power users, and a local Data API (Port 41184) that facilitates advanced automation workflows. For enterprises and power users, Joplin Cloud provides specialized features such as note sharing, real-time collaboration, and email-to-note functionality, positioning it as the premier privacy-centric solution for decentralized teams and researchers who require absolute data sovereignty.