The best open source alternative to Notesnook is AppFlowy. If that doesn't suit you, we've compiled a ranked list of other open source Notesnook alternatives to help you find a suitable replacement. Other interesting open source alternatives to Notesnook are: Memos, Joplin, SiYuan, and Logseq.
Notesnook alternatives are mainly Note-Taking Tools but may also be Personal Knowledge Management (PKM) Tools or Secure & Encrypted Notes. Browse these if you want a narrower list of alternatives or looking for a specific functionality of Notesnook.
An open-source alternative to Notion, offering powerful note-taking, task management, and database features in a customizable interface.

AppFlowy is a versatile, open-source productivity tool that combines the best features of note-taking apps and project management software. It provides a flexible workspace where you can organize your thoughts, tasks, and projects with ease.
Key benefits of AppFlowy include:
AppFlowy combines the flexibility of a note-taking app with the structure of a project management tool, allowing you to capture ideas, plan projects, and organize information all in one place. Whether you're a student, professional, or creative, AppFlowy adapts to your needs, helping you stay organized and productive.
Looking for open source alternatives to other popular services? Check out other posts in the alternatives series and openalternative.co, a directory of open source software with filters for tags and alternatives for easy browsing and discovery.
A self-hosted, open-source solution for secure and efficient note-taking, allowing you to easily capture and share your thoughts.

Memos is a powerful, privacy-focused note-taking solution that puts you in control of your data. This lightweight, open-source tool offers a seamless experience for capturing and organizing your thoughts.
Key features:
Why choose Memos?
Whether you're a student, professional, or creative thinker, Memos provides a streamlined, secure environment for capturing and organizing your ideas. Experience the freedom of open-source, privacy-focused note-taking today!
A free, cross-platform note-taking and to-do application with end-to-end encryption for seamless organization and productivity.

Joplin is a powerful, open-source note-taking and to-do application that puts your privacy and productivity first. With its intuitive interface and robust features, Joplin makes it easy to capture, organize, and access your thoughts, ideas, and tasks across all your devices.
Key benefits of Joplin include:
Experience the freedom of open-source note-taking with Joplin, where your ideas flow freely, and your data remains yours.
SiYuan is a personal knowledge management system that prioritizes privacy, supports Markdown, and offers block-level referencing and bidirectional linking.

SiYuan is a robust personal knowledge management system designed with privacy at its core. It offers a unique blend of features that cater to users who value data security and efficient information organization.
Key features of SiYuan include:
SiYuan stands out by combining the power of block-level referencing, bidirectional links, and a privacy-first approach. This makes it an ideal tool for users who need to manage complex information structures while maintaining control over their data. Whether you're a researcher, writer, or knowledge worker, SiYuan provides the tools to refactor your thinking and build a comprehensive personal knowledge base.
A privacy-first, open-source platform for networked thought. Organize, connect, and discover your ideas with ease.

Logseq is a powerful, open-source knowledge management tool that revolutionizes the way you capture, organize, and explore your thoughts. At its core, Logseq functions as a local-first, non-linear notebook that empowers users to create a personalized knowledge graph.
Key benefits of Logseq include:
Whether you're a student, researcher, writer, or professional, Logseq provides a robust framework for capturing, connecting, and cultivating your ideas. Experience the power of networked thought and unlock your full cognitive potential with Logseq.
The next generation of open-source AI-powered card notes designed to help you quickly capture and organize inspiration so that ideas never run out.

Blinko is a powerful self-hosted note-taking solution that puts you in control of your personal knowledge management. With its intuitive interface, you can:
Perfect for students, researchers, writers, and anyone who wants to build a structured personal knowledge base while maintaining complete control over their data.
Looking for open source alternatives to other popular services? Check out other posts in the alternatives series and openalternative.co, a directory of open source software with filters for tags and alternatives for easy browsing and discovery.
A versatile, open-source tool for organizing thoughts, notes, and data with customizable objects and relational structures.

AnyType revolutionizes personal knowledge management by offering a flexible, open-source platform that adapts to your unique way of thinking. At its core, AnyType allows you to create and connect customizable objects, representing anything from notes and tasks to projects and contacts.
Key benefits of AnyType include:
AnyType empowers you to build a digital second brain that truly reflects your thought processes, making it an indispensable tool for researchers, writers, students, and anyone seeking to organize their digital life more effectively.
Cross-platform note-taking app with end-to-end encryption, offline access, and powerful organization features for privacy-conscious users.

Standard Notes is a powerful, open-source note-taking application designed for those who value privacy and security in their digital lives. With a focus on simplicity and robust encryption, it offers a seamless experience across all your devices.
Key benefits of Standard Notes include:
Standard Notes offers both free and paid plans, allowing users to choose the level of features that best suits their needs. Whether you're jotting down quick thoughts, managing complex projects, or safeguarding sensitive information, Standard Notes provides a secure and versatile solution for all your note-taking requirements.
A local-first note-taking application that prioritizes privacy and efficiency, featuring Markdown support, offline access, and powerful organization tools.

Beaver Notes is a powerful open-source note-taking application built with privacy and productivity in mind. Your notes are stored exclusively on your local device, ensuring complete data privacy and control.
Key features include:
The application combines modern design with powerful features while maintaining simplicity and ease of use. Whether you're taking personal notes, managing projects, or creating documentation, Beaver Notes provides the tools you need without compromising on privacy.
A customizable, offline-first note editor that lets you format text, create lists, add images, and export to HTML - all while maintaining your privacy.

Darkwrite is a feature-rich note-taking application designed for users who value both functionality and privacy. The editor supports essential formatting options like lists, text styling, and image embedding while maintaining a clean, distraction-free interface.
Key benefits:
Whether you're taking quick notes or working on longer documents, Darkwrite provides the perfect balance of features and simplicity while keeping your data private and secure.
OpenNotas is a multi-platform, end-to-end encrypted note-taking app that offers simplicity, synchronization, and offline functionality.

OpenNotas is a versatile and user-friendly note-taking application designed for personal use across multiple platforms. Here are its key features and benefits:
Simplicity: OpenNotas boasts an intuitive interface, allowing users to start writing notes immediately without navigating complex settings.
Multi-platform support: Available on various devices and operating systems, including mobile phones, computers, Windows, Linux, and macOS.
Synchronization: Users can sync their notes across devices through Adapter configuration, ensuring access to their information from anywhere.
End-to-End Encryption (E2EE): Utilizes AES algorithm to encrypt note data before storing it on the server, guaranteeing data security and privacy.
Offline functionality: OpenNotas can be used without an internet connection, with data stored locally and synced when connectivity is restored.
Free and open-source: The application is completely free to use and has its source code openly available.
Customizable sync options: Users can set up note syncing across devices through Adapter configuration, providing flexibility in how data is managed.
Data control: OpenNotas does not store user note data on its servers, giving users full control over their information.
Multiple language support: The application is available in various languages, including English, Vietnamese, and Traditional Chinese.
OpenNotas strikes a balance between simplicity and functionality, making it an excellent choice for users who prioritize privacy, ease of use, and cross-platform availability in their note-taking solution.
Looking for open source alternatives to other popular services? Check out other posts in the alternatives series and openalternative.co, a directory of open source software with filters for tags and alternatives for easy browsing and discovery.
Justnote is a secure note-taking app that lets you easily create and sync notes across devices while maintaining full control of your data.

Justnote is a privacy-focused note-taking app designed for simplicity, speed, and data ownership. Key features include:
Justnote uses blockchain technology from Stacks to create a truly decentralized app where only you can access and control your account and notes. Your data is encrypted and stored on servers of your choice.
With Justnote, you can quickly jot down ideas, to-do lists, and other notes without worrying about privacy or losing access to your data. The clean, distraction-free interface lets you focus on your thoughts.
Whether you need a simple notepad for quick memos or a secure place to store sensitive information, Justnote provides an easy-to-use and private note-taking experience across all your devices.