Key takeaways
- Open source mainly buys you control of the data and no forced migration later.
- Sync is where these apps differ most, and where the setup effort goes.
- Check the export format before committing. Portability is the main reason to choose one.
In today’s fast-paced digital world, keeping track of your thoughts, ideas, and tasks is more important than ever. Note-taking apps have become essential tools for students, professionals, and teams alike. While many paid options are available, open-source apps stand out for their flexibility, transparency, and cost-effectiveness.
Whether you’re a non-technical business owner looking for simplicity or a software engineer seeking highly customizable tools, there’s an open-source note-taking app that fits your needs. In this article, we’ll explore the best options for 2026, moving from beginner-friendly solutions to more advanced tools.
Quick Overview: Best Open Source Note-Taking Apps in 2026
- Joplin – Open source, end-to-end encrypted, on every major platform.
- Notally – Minimalistic and open source, for Android.
- Standard Notes – Privacy-focused and encrypted.
- Obsidian – Free (not open source) and Markdown-based, with notes stored as local files.
- Zim Wiki – Wiki-style organization for structured note-taking.
- Trilium Notes – Hierarchical notes for advanced users.
- Turtl – Encrypted notes for privacy enthusiasts.
- Logseq – Open-source for task and knowledge management.
- FocusBox – Not a note-taking app: an AI to-do list and focus app to pair with your notes.
Every feature below was checked on the project’s own site or repository in September 2026.
Why Choose Open Source for Note-Taking?
Open-source software offers unparalleled benefits:
- Transparency: With source code available, you can verify the app’s security.
- Customization: Tailor features to your needs, especially useful for technical users.
- Cost: Most open-source apps are free, making them budget-friendly.
- Community Support: Benefit from active user communities for troubleshooting and improvements.
Whether you’re prioritizing privacy, customization, or collaboration, there’s an open-source app for you.
The Best Open Source Note-Taking Apps in 2026
1. Joplin
Category: Comprehensive Note-Taking
Joplin is an open-source note-taking app with a wide feature set. It offers Markdown and rich text editors, end-to-end encryption, and sync through Joplin Cloud, Dropbox or OneDrive. It runs on Windows, macOS, Linux, Android and iOS, and there is a terminal app too.
- Key Features: Markdown or rich text editing, end-to-end encrypted sync, web clipper for Chrome and Firefox, plugins and themes.
- Best For: Professionals and students needing secure, organized notes.
2. Notally
Category: Minimalist Note-Taking
Notally is a light, open-source (GPL-3.0) notes app for Android, for users who prefer a distraction-free interface. Its small size and minimal dependencies suit quick notes.
- Key Features: Reminders, auto backup, labels and colors, export to TXT, JSON, HTML or PDF.
- Best For: Minimalists and Android users.
3. Standard Notes
Category: Privacy-First Notes
Standard Notes is a secure app designed for those who prioritize privacy. Its code is open and independently audited, notes and files are end-to-end encrypted, and the free version syncs across unlimited devices.
- Key Features: End-to-end encrypted notes and files, cross-platform sync, Markdown and rich text documents, tasks.
- Best For: Privacy-conscious individuals.
4. Obsidian
Category: Knowledge Management
Obsidian organizes your thoughts into a network of linked notes, which suits developers and knowledge workers. It is the one app here that is not open source, but it earns its place for the same reason people choose open source: it stores your notes locally as plain text Markdown files in open formats, so you are never locked in. Obsidian is free for all purposes, including commercial use (obsidian.md/license, September 2026).
- Key Features: Graph view, links between notes, Canvas, thousands of community plugins and themes.
- Best For: Knowledge workers and researchers.
5. Zim Wiki
Category: Structured Notes
Zim is a desktop wiki: a graphical text editor for a collection of wiki pages that link to each other. All data is stored in plain text files with wiki formatting, so it is easy to edit elsewhere.
- Key Features: Wiki-style linking, a folder structure for pages with attachments, plugins for task lists, equations and version control.
- Best For: Technical users and project planners.
6. Trilium Notes
Category: Advanced Hierarchical Notes
Trilium is a free, open-source, cross-platform hierarchical note-taking app built for large personal knowledge bases. The original developer handed the project to the community, and it is now maintained as TriliumNext.
- Key Features: Tree-structured organization, sync through a self-hosted sync server, per-note encryption, publishing notes to the web.
- Best For: Advanced users and developers.
7. Turtl
Category: Encrypted Notes
Turtl focuses on keeping your data safe with strong encryption, while still letting you share with the people you choose. It works for notes, bookmarks, files and other sensitive information.
- Key Features: Encryption, Spaces for sharing, tags and Markdown notes, the option to run your own Turtl server.
- Best For: Privacy enthusiasts.
8. Logseq
Category: Task and Knowledge Management
Logseq is an open-source, privacy-first knowledge base combining note-taking and task management. Your data stays local as Markdown files, and it is free for personal use.
- Key Features: Linked references and block references, task management, flashcards, PDF annotations, 150+ plugins.
- Best For: Students and professionals looking for integrated knowledge management.
9. FocusBox
Category: AI-Powered Productivity
FocusBox is neither open source nor a note-taking app, but it pairs well with one. Where your notes app holds what you know, FocusBox handles what you need to do: its AI to-do list and project generators turn plain text into tasks and subtasks, and each task runs on a timer with reminders, alarms and ambient sound options. It also imports tasks from Notion, Todoist, Asana, ClickUp and Jira.
- Key Features: AI task generation, timers and Pomodoro, ambient sounds, full-screen focus mode, reports.
- Best For: People who keep notes in one app and want a separate place to plan and focus on tasks.
Frequently Asked Questions
What is the best free note-taking app?
Joplin and Obsidian are strong free options for feature-rich note-taking. Joplin is open source; Obsidian is free but not open source.
Is Joplin completely free?
The Joplin app is free and open source. Joplin Cloud is an optional hosted service for sync and sharing; you can also sync through Dropbox or OneDrive instead.
Is Notally open source?
Yes, Notally is an open-source (GPL-3.0) Android project with a focus on minimalism.
Which of these apps encrypt my notes?
Joplin, Standard Notes and Turtl all use end-to-end encryption, and Trilium offers per-note encryption.
Conclusion
Selecting the right note-taking app depends on your priorities, whether it’s privacy, simplicity, or structure. Open-source tools like Joplin, Notally and Logseq cost nothing to use, and Obsidian, while not open source, is also free and keeps your notes in plain Markdown.
With FocusBox, you can load templates, generate tasks and subtasks with AI, and add ambient sound and a full-screen focus mode when it is time to act on your notes.
