Open Source Evernote Alternatives

AFFiNE is an open-source workspace that brings together structured documents, freeform whiteboards, and databases under one roof. Instead of maintaining separate tools for writing, visual planning, and data organization, everything lives in a single connected environment. It's built around a local-first architecture, meaning your data stays on your device by default rather than being handed off to a cloud service.

The core idea is that knowledge work rarely fits into one mode. A project might start as a brainstorm on a whiteboard, become a structured document, and eventually need a database to track tasks or decisions. AFFiNE treats these as parts of the same thing rather than separate applications. Blocks are the building unit across all three modes, so content can move between a written page and a visual canvas without friction.

AI assistance is built into the writing, drawing, and planning workflows. It can help draft content, summarize notes, and support ideation without requiring a separate tool or tab switch.

AFFiNE works for individuals and teams. Solo users get a private, local-first notebook with visual tools. Teams can collaborate on shared knowledge bases, document decisions, map out project plans, and keep related material connected. Ready-to-use templates cover common project types to reduce setup time.

The project is fully open source under the Toeverything organization. The codebase is auditable and community contributions are accepted. A free tier covers individual use. Commercial and team usage requires a paid plan.

It's a practical alternative to combining Notion with a whiteboard tool and a separate database app. Tools like AppFlowy and AnyType occupy similar territory for privacy-focused users, though neither merges the whiteboard mode as directly. If you want Atlassian Confluence-style team docs but with local-first storage and visual planning built in, AFFiNE covers that ground in a single install.

AppFlowy is an open source workspace that brings together documents, wikis, project tracking, and team collaboration in one place. It's built as a self-hostable alternative to tools like Notion, designed for people who want a modern workspace without handing their data to a third-party cloud.

The core of the product is a block-based editor paired with flexible databases. You can build pages with rich content types, attach properties and labels to records, and switch between different views of the same data. Grids, boards, and calendars are all available. Custom themes and fonts let you adjust the look to your preference.

AI is built directly into the workspace, not bolted on as a separate add-on. You can ask questions across your pages, generate and improve writing, and autofill database fields from existing content. AppFlowy supports multiple AI backends including GPT-5, Gemini 2.5, and Claude 3.7, and it also supports running local models like Mistral 7B and Llama 3 on your own machine. That local option matters for teams or individuals who need AI assistance without sending data to external servers — something tools like Flowise AI or Langflow approach from a different angle.

Offline mode is fully supported. The app works without an internet connection and syncs when connectivity returns, across desktop and mobile. iOS and Android apps are available alongside the desktop clients.

Self-hosting is a first-class option, not a workaround. You can run AppFlowy on your own infrastructure with no vendor lock-in. For teams that can't store sensitive information in someone else's cloud, this is a practical path. If you're also evaluating Baserow for database-heavy workflows or OpenWork for team collaboration, AppFlowy sits at the intersection of both.

The project has over 400 contributors and a community spanning more than 215 countries. A plugin and template ecosystem is actively growing, which extends the toolbox beyond what ships by default.

Memos is built around a single idea: capture the thought now, sort it out later. It presents notes as a private timeline rather than a hierarchy of folders, notebooks, or workspaces. You open it, write in Markdown, and move on. No title required, no template to fill out, no folder decision standing between you and saving something.

The timeline format makes it feel closer to a personal feed than a traditional note app. Each memo can carry tags, inline tasks, and links. Tags accumulate naturally as you write, and search works across everything when you need to find something later. The interaction stays light on purpose.

Markdown is the native format throughout. Notes stay readable outside the app, portable to other tools, and easy to back up as plain files. There's no proprietary format holding your content in place — unlike heavier knowledge base tools that lock structure into their own schemas.

Self-hosting is the core premise. Memos runs on your own server, stores notes in your own database, and keeps the full data path under your control. It's lightweight enough to run on a Raspberry Pi or a small VPS. No seat pricing, no paid feature tiers, no account required with a third-party service.

The MIT license means the source is fully inspectable and modifiable. Development happens publicly on GitHub, shaped in part by contributors who run Memos themselves.

Memos fits people who want a private place for operational notes, daily logs, saved links, and fleeting thoughts that don't belong in a project management tool or a shared chat thread. If you want something with end-to-end encryption baked in, Notesnook or Standard Notes are worth a look. If you want outlining and backlinks, Logseq goes much deeper. Memos doesn't try to be any of those things. It's a small, fast place to put things before they disappear.

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:

• End-to-end encryption: Keep your notes secure with military-grade encryption, ensuring your data remains private and protected.
• Cross-platform synchronization: Seamlessly access your notes on Windows, macOS, Linux, Android, and iOS, with real-time syncing across devices.
• Markdown support: Create beautifully formatted notes using Markdown, with a live preview to see your changes instantly.
• Rich media integration: Easily embed images, audio, and other file types directly into your notes for comprehensive documentation.
• Customizable organization: Use notebooks, sub-notebooks, and tags to create a structure that fits your unique workflow.
• Web clipper: Save web pages and screenshots directly to Joplin with the browser extension for effortless research and reference.
• Search and filter: Quickly find the information you need with powerful search capabilities and customizable filters.
• Import and export: Seamlessly transition from other note-taking apps by importing your existing notes, and export your data in various formats.
• Plugin system: Extend Joplin's functionality with a growing ecosystem of community-developed plugins.

Experience the freedom of open-source note-taking with Joplin, where your ideas flow freely, and your data remains yours.

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:

• Complete offline usage: Work on your knowledge base without an internet connection, ensuring your data remains under your control.
• End-to-end encrypted sync: Securely synchronize your data across devices without compromising privacy.
• Block-level editing: Organize your thoughts and knowledge at a granular level, making it easier to reference and link information.
• Bidirectional linking: Create a web of interconnected knowledge, enhancing the discoverability and context of your notes.
• WYSIWYG editor: Enjoy a user-friendly interface that supports Markdown formatting.
• AI integration: Access OpenAI capabilities to assist with writing, translation, and idea generation.
• Database functionality: Create relational databases within your knowledge base for more structured data management.
• Spaced repetition: Improve memory retention with built-in review algorithms.

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.

Notesnook is the ultimate solution for privacy-conscious individuals who want to keep their thoughts, ideas, and information secure. This powerful note-taking app combines robust security features with a user-friendly interface, making it the perfect choice for both personal and professional use.

Key benefits of Notesnook include:

• End-to-end encryption: Your notes are encrypted on your device before being synced, ensuring that only you can access your information.
• Cross-platform synchronization: Seamlessly access your notes across all your devices, including Windows, macOS, Linux, iOS, and Android.
• Rich text editing: Create beautifully formatted notes with support for Markdown, tables, and code blocks.
• Offline support: Work on your notes anytime, anywhere, even without an internet connection.
• Organization tools: Keep your notes organized with notebooks, tags, and powerful search capabilities.
• Import and export: Easily migrate your notes from other platforms or export them in various formats.
• Customizable themes: Personalize your note-taking experience with light and dark modes.
• Regular updates: Benefit from continuous improvements and new features added by the dedicated development team.

With Notesnook, you can focus on capturing your ideas and staying productive, knowing that your privacy is protected. Whether you're a student, professional, or creative individual, Notesnook provides the tools you need to manage your digital life securely and efficiently.

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:

• Create and organize notes with rich text formatting and markdown support
• Build connections between related notes to create a personal knowledge graph
• Keep your data private and secure by self-hosting on your own infrastructure
• Access your notes from anywhere through web and mobile interfaces
• Import and export notes in standard formats for data portability
• Customize the experience with themes and plugins

Perfect for students, researchers, writers, and anyone who wants to build a structured personal knowledge base while maintaining complete control over their data.

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:

• Infinite customization: Design your own object types and relations to match your specific needs and workflows.
• Powerful linking: Create meaningful connections between your ideas, tasks, and information for a truly interconnected knowledge base.
• Local-first approach: Your data stays on your device, ensuring privacy and control over your information.
• Cross-platform synchronization: Seamlessly access and update your knowledge across all your devices.
• Open-source foundation: Benefit from community-driven development and the ability to extend functionality.
• Markdown support: Write and format your content with ease using familiar Markdown syntax.
• Graph view: Visualize the connections between your objects for better insight and discovery.
• Customizable views: Organize and display your information in tables, boards, or galleries to suit your preferences.

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.

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:

• End-to-end encryption: Your notes are protected with AES-256 encryption, ensuring that only you can access your data.
• Cross-platform synchronization: Seamlessly access your notes on desktop, mobile, and web browsers.
• Offline access: Work on your notes anytime, anywhere, even without an internet connection.
• Markdown support: Write and format your notes efficiently using Markdown syntax.
• Customizable experience: Extend functionality with editors, themes, and components through the Extensions system.
• Long-term data integrity: With encrypted backups and data portability, your notes are safe and accessible for years to come.
• Open-source transparency: The codebase is open for review, fostering trust and community-driven improvements.
• No ads or tracking: Your privacy is respected with a clean, distraction-free interface.

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.

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:

• Privacy-First Design: All notes are saved locally on your computer
• Markdown Support: Create rich formatted content with simple text syntax
• Note Linking: Build a personal knowledge graph by connecting related notes
• Command Prompt: Quick access to search, settings, and theme switching
• Advanced Organization: Tag system and heading tree for easy navigation
• Rich Media Support: Embed documents, presentations, and create diagrams with Mermaid
• Export Options: Share notes as PDFs or sync across devices using your preferred cloud service
• Code & Math Support: Syntax highlighting for code blocks and LaTeX math expressions

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 clean, quiet space for your thoughts with zero vendor lock-in. Your notes live in standard Markdown within a local SQLite database, ensuring your content remains accessible forever.

Key Features:

• Lightweight & Fast: Single Go binary (~20MB memory) or Docker deployment
• Future-Proof Storage: Standard Markdown files in local SQLite - no proprietary formats
• Flexible Organization: Tag-based system with custom "Focus Modes" instead of rigid folders
• Instant Search: Full-text search with BM25 ranking across all content
• Rich Markdown Support: Tables, code blocks, task lists, highlights, and more

Smart Workflow:

• Multiple Views: Switch between list, card, and gallery layouts
• Image Support: Drag-and-drop images with automatic management
• Archive & Restore: Soft delete with cleanup automation
• Keyboard Shortcuts: Essential shortcuts for creating, searching, and formatting
• Mobile-Friendly: Responsive design with PWA installation option

Built for Longevity:

• Offline Access: Read and edit notes without internet connection
• Dark Mode: Comfortable reading in low-light environments
• Import Options: Migrate existing Markdown and text files seamlessly
• MCP Server: Connect AI apps to chat with your notes and discover connections
• Minimal Dependencies: Lean codebase reduces bit rot risk for long-term stability

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:

• Truly offline experience: All your notes are stored locally, ensuring complete privacy and constant access
• Customizable interface: Choose from multiple themes and fonts to create your perfect writing environment
• Export flexibility: Save your work as HTML files for easy sharing and backup
• Cross-platform compatibility: Available for Windows, Linux, and macOS
• Open-source transparency: Full access to the source code ensures security and trust

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 versatile and user-friendly note-taking application designed for personal use across multiple platforms. Here are its key features and benefits:

1. Simplicity: OpenNotas boasts an intuitive interface, allowing users to start writing notes immediately without navigating complex settings.

2. Multi-platform support: Available on various devices and operating systems, including mobile phones, computers, Windows, Linux, and macOS.

3. Synchronization: Users can sync their notes across devices through Adapter configuration, ensuring access to their information from anywhere.

4. End-to-End Encryption (E2EE): Utilizes AES algorithm to encrypt note data before storing it on the server, guaranteeing data security and privacy.

5. Offline functionality: OpenNotas can be used without an internet connection, with data stored locally and synced when connectivity is restored.

6. Free and open-source: The application is completely free to use and has its source code openly available.

7. Customizable sync options: Users can set up note syncing across devices through Adapter configuration, providing flexibility in how data is managed.

8. Data control: OpenNotas does not store user note data on its servers, giving users full control over their information.

9. 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.

Justnote is a privacy-focused note-taking app designed for simplicity, speed, and data ownership. Key features include:

• Simple and fast interface for quick note-taking on any device
• End-to-end encryption to keep your notes private and secure
• Cross-device syncing to access notes anywhere
• Web3 technology that gives you full control of your account and data
• No ads or data mining
• Rich text editor with formatting options
• Dark mode for comfortable night-time use
• Available on web, iOS, and Android

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.

Cloudmark transforms how you manage your web bookmarks with powerful cloud-based features. Save any webpage instantly with a simple drag-and-drop browser extension that works across all major browsers. The smart categorization system automatically organizes your bookmarks into logical groups, making it easy to find what you need.

Key benefits include:

• One-click saving from any browser or device
• Intelligent auto-categorization of bookmarks
• Cross-device sync and access
• Collaborative features for sharing collections
• Clean, intuitive interface for easy navigation
• Secure cloud storage of your bookmarks

Whether you're a professional managing research materials or a casual user keeping track of interesting content, Cloudmark provides a seamless way to organize and access your digital resources.