Open-source alternatives guide · Updated 2026
Compare the best free and open-source alternatives to Obsidian — 19 verified projects with explicit catalog relationships. Inspect licenses, GitHub activity, self-hosting signals, and migration fit before you switch.
Official product reference Obsidian↗Only explicit alternative relationships are shown—never inferred competitor claims.
This guide compares 19 verified open-source alternatives to Obsidian, including OpenClaw, AppFlowy, Memos, and Joplin.
Projects appear across AI & Machine Learning, Productivity, and Data & Analytics. 8 options include a self-hosting signal — see the self-hosted catalog. Ranking follows public GitHub stars and recorded momentum—not vendor marketing. Compare projects side by side, then confirm license fit, migration effort, and operational ownership before adopting any option.
PKM users seeking local Markdown notes, graph linking, and sync they can self-host.
Migration tip: Prefer tools that keep plain Markdown (or org-mode) on disk. Plugin parity matters less than durable file format and backup habits.
Strongest repository-activity signal: OpenClaw · Jump to ranking · 384.4K stars
Obsidian is a popular local-first Markdown knowledge base with a graph view and a large plugin ecosystem. Searchers often want fully open-source note apps, sync they control, or mobile workflows without proprietary sync vaults.
Visit ObsidianCompare capabilities, licensing, and ownership model. Stars help with discovery; they are not a security or product-fit guarantee.
Open-source alternative to Obsidian
Your own personal AI assistant. Any OS. Any Platform. The lobster way. 🦞
Your own personal AI assistant. Any OS. Any Platform. The lobster way. 🦞 Review the official repository, license, release activity, and deployment documentation before production
Bring projects, wikis, and teams together with AI. AppFlowy is the AI collaborative workspace where you achieve more without losing control of your data. The leading open source Notion alternative.
Bring projects, wikis, and teams together with AI. AppFlowy is the AI collaborative workspace where you achieve more without losing control of your data. The leading open source No
Open-source alternative to Obsidian
Open-source, self-hosted note-taking tool built for quick capture. Markdown-native, lightweight, and fully yours.
Open-source, self-hosted note-taking tool built for quick capture. Markdown-native, lightweight, and fully yours. Review the official repository, license, release activity, and dep
Joplin - the privacy-focused note taking app with sync capabilities for Windows, macOS, Linux, Android and iOS.
Joplin - the privacy-focused note taking app with sync capabilities for Windows, macOS, Linux, Android and iOS. Review the official repository, license, release activity, and deplo
Open-source alternative to Obsidian
A privacy-first, self-hosted, fully open source personal knowledge management software, written in typescript and golang.
A privacy-first, self-hosted, fully open source personal knowledge management software, written in typescript and golang. Review the official repository, license, release activity,
A privacy-first, open-source platform for knowledge management and collaboration. Download link: http://github.com/logseq/logseq/releases. roadmap: https://logseq.io/p/NX4mc_ggEV
Open-source alternative to Obsidian
An Open Source implementation of Notebook LM with more flexibility and features
An Open Source implementation of Notebook LM with more flexibility and features Review the official repository, license, release activity, and deployment documentation before produ
Open-source alternative to Obsidian
Docmost is an open-source collaborative wiki and documentation software. It is an open-source alternative to Confluence and Notion.
Docmost is an open-source collaborative wiki and documentation software. It is an open-source alternative to Confluence and Notion. Review the official repository, license, release
Open-source alternative to Obsidian
Desktop app to manage markdown knowledge bases
Desktop app to manage markdown knowledge bases Review the official repository, license, release activity, and deployment documentation before production adoption.
Open-source alternative to Obsidian
A fully open source & end-to-end encrypted note taking alternative to Evernote.
A fully open source & end-to-end encrypted note taking alternative to Evernote. Review the official repository, license, release activity, and deployment documentation before produ
Open-source alternative to Obsidian
An open-source, self-hosted personal AI note tool prioritizing privacy, built using TypeScript .
An open-source, self-hosted personal AI note tool prioritizing privacy, built using TypeScript . Review the official repository, license, release activity, and deployment documenta
Official Anytype client for MacOS, Linux, and Windows
Official Anytype client for MacOS, Linux, and Windows Review the official repository, license, release activity, and deployment documentation before production adoption.
Think fearlessly with end-to-end encrypted notes and files. For issues, visit https://standardnotes.com/forum or https://standardnotes.com/help.
Think fearlessly with end-to-end encrypted notes and files. For issues, visit https://standardnotes.com/forum or https://standardnotes.com/help. Review the official repository, lic
Open-source alternative to Obsidian
Open-source notes that live where you choose: your device, your server, or ours.
Open-source notes that live where you choose: your device, your server, or ours. Review the official repository, license, release activity, and deployment documentation before prod
Open-source alternative to Obsidian
The XWiki platform
The XWiki platform Review the official repository, license, release activity, and deployment documentation before production adoption.
Open-source alternative to Obsidian
Notes as it should have been. Built for people who just want to write, without nonsense.
Notes as it should have been. Built for people who just want to write, without nonsense. Review the official repository, license, release activity, and deployment documentation bef
Open-source alternative to Obsidian
Streamline your work with our all-in-one knowledge, doc, and project management system.
Streamline your work with our all-in-one knowledge, doc, and project management system. Review the official repository, license, release activity, and deployment documentation befo
Open-source alternative to Obsidian
A Simple, Lightweight, Cross-Platform Personal Note-Taking Application.
A Simple, Lightweight, Cross-Platform Personal Note-Taking Application. Review the official repository, license, release activity, and deployment documentation before production ad
Open-source alternative to Obsidian
A simple, fast, privacy-focused note-taking app that you can use easily, take notes rapidly, and, importantly, truly own your account and data.
A simple, fast, privacy-focused note-taking app that you can use easily, take notes rapidly, and, importantly, truly own your account and data. Review the official repository, lice
Map must-have capabilitiesList the workflows in Obsidian you cannot drop during migration.
Verify the licenseConfirm it fits your use, distribution, and compliance model. Browse license briefs.
Run a proof of conceptTest real data, integrations, clients, and failure modes. Use Compare for side-by-side checks.
Plan ownershipAssess upgrades, backups, support, and an exit path. Read when self-hosting is worth it.
[Logseq](/projects/logseq), Anytype, Joplin, AppFlowy, and AFFiNE cover overlapping PKM needs. [Logseq](/projects/logseq) is the closest outliner/graph experience for many Markdown-first users.
[Logseq](/projects/logseq) and several local-first tools work with filesystem notes. Always dry-run import/export on a copy of your vault before committing.
Use Git, Syncthing, Nextcloud, or another file sync you control. Treat sync as infrastructure—separate from the editor choice.
Narrow the same alternatives by search, license, tags, or self-hosting signals when you need a tighter shortlist.
Your own personal AI assistant. Any OS. Any Platform. The lobster way. 🦞
AI & Machine LearningOpen-source projects grouped in this category for discovery and comparison.#
TypeScriptProjects tagged with this topic in the verified catalog.
Github ActionsProjects tagged with this topic in the verified catalog.
JavaScriptProjects tagged with this topic in the verified catalog.AI-nativeThis project includes AI-native capability signals in the catalog metadata.
ObsidianProprietary local-first knowledge base built on Markdown.
United StatesAGPL-3.0Bring projects, wikis, and teams together with AI. AppFlowy is the AI collaborative workspace where you achieve more without losing control of your data. The leading open source Notion alternative.
ProductivityOpen-source projects grouped in this category for discovery and comparison.#
DartProjects tagged with this topic in the verified catalog.Github ActionsProjects tagged with this topic in the verified catalog.JavaScriptProjects tagged with this topic in the verified catalog.
Self-hostedThis project carries a self-hosting or local-deployment signal. Verify the official install guide before production use.ObsidianProprietary local-first knowledge base built on Markdown.Open-source, self-hosted note-taking tool built for quick capture. Markdown-native, lightweight, and fully yours.
Data & AnalyticsOpen-source projects grouped in this category for discovery and comparison.#
GoProjects tagged with this topic in the verified catalog.Github ActionsProjects tagged with this topic in the verified catalog.JavaScriptProjects tagged with this topic in the verified catalog.Self-hostedThis project carries a self-hosting or local-deployment signal. Verify the official install guide before production use.ObsidianProprietary local-first knowledge base built on Markdown.Joplin - the privacy-focused note taking app with sync capabilities for Windows, macOS, Linux, Android and iOS.
ProductivityOpen-source projects grouped in this category for discovery and comparison.#TypeScriptProjects tagged with this topic in the verified catalog.Github ActionsProjects tagged with this topic in the verified catalog.JavaScriptProjects tagged with this topic in the verified catalog.ObsidianProprietary local-first knowledge base built on Markdown.A privacy-first, self-hosted, fully open source personal knowledge management software, written in typescript and golang.
AI & Machine LearningOpen-source projects grouped in this category for discovery and comparison.#TypeScriptProjects tagged with this topic in the verified catalog.Github ActionsProjects tagged with this topic in the verified catalog.JavaScriptProjects tagged with this topic in the verified catalog.Self-hostedThis project carries a self-hosting or local-deployment signal. Verify the official install guide before production use.AI-nativeThis project includes AI-native capability signals in the catalog metadata.ObsidianProprietary local-first knowledge base built on Markdown.United StatesAGPL-3.0A privacy-first, open-source platform for knowledge management and collaboration. Download link: http://github.com/logseq/logseq/releases. roadmap: https://logseq.io/p/NX4mc_ggEV
Security & PrivacyOpen-source projects grouped in this category for discovery and comparison.#ClojureProjects tagged with this topic in the verified catalog.Github ActionsProjects tagged with this topic in the verified catalog.JavaScriptProjects tagged with this topic in the verified catalog.Self-hostedThis project carries a self-hosting or local-deployment signal. Verify the official install guide before production use.ObsidianProprietary local-first knowledge base built on Markdown.An Open Source implementation of Notebook LM with more flexibility and features
InfrastructureOpen-source projects grouped in this category for discovery and comparison.#TypeScriptProjects tagged with this topic in the verified catalog.Github ActionsProjects tagged with this topic in the verified catalog.JavaScriptProjects tagged with this topic in the verified catalog.ObsidianProprietary local-first knowledge base built on Markdown.Docmost is an open-source collaborative wiki and documentation software. It is an open-source alternative to Confluence and Notion.
ProductivityOpen-source projects grouped in this category for discovery and comparison.#TypeScriptProjects tagged with this topic in the verified catalog.JavaScriptProjects tagged with this topic in the verified catalog.
NodeJSProjects tagged with this topic in the verified catalog.Self-hostedThis project carries a self-hosting or local-deployment signal. Verify the official install guide before production use.ObsidianProprietary local-first knowledge base built on Markdown.Desktop app to manage markdown knowledge bases
Content & CollaborationOpen-source projects grouped in this category for discovery and comparison.#TypeScriptProjects tagged with this topic in the verified catalog.Github ActionsProjects tagged with this topic in the verified catalog.JavaScriptProjects tagged with this topic in the verified catalog.ObsidianProprietary local-first knowledge base built on Markdown.A fully open source & end-to-end encrypted note taking alternative to Evernote.
ProductivityOpen-source projects grouped in this category for discovery and comparison.#TypeScriptProjects tagged with this topic in the verified catalog.Github ActionsProjects tagged with this topic in the verified catalog.JavaScriptProjects tagged with this topic in the verified catalog.Self-hostedThis project carries a self-hosting or local-deployment signal. Verify the official install guide before production use.ObsidianProprietary local-first knowledge base built on Markdown.An open-source, self-hosted personal AI note tool prioritizing privacy, built using TypeScript .
AI & Machine LearningOpen-source projects grouped in this category for discovery and comparison.#TypeScriptProjects tagged with this topic in the verified catalog.Github ActionsProjects tagged with this topic in the verified catalog.JavaScriptProjects tagged with this topic in the verified catalog.Self-hostedThis project carries a self-hosting or local-deployment signal. Verify the official install guide before production use.AI-nativeThis project includes AI-native capability signals in the catalog metadata.ObsidianProprietary local-first knowledge base built on Markdown.Official Anytype client for MacOS, Linux, and Windows
Security & PrivacyOpen-source projects grouped in this category for discovery and comparison.#TypeScriptProjects tagged with this topic in the verified catalog.Github ActionsProjects tagged with this topic in the verified catalog.JavaScriptProjects tagged with this topic in the verified catalog.Self-hostedThis project carries a self-hosting or local-deployment signal. Verify the official install guide before production use.ObsidianProprietary local-first knowledge base built on Markdown.
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