You've likely heard this saying before: "Your second brain should work just like your first one". That's exactly what PKM (personal knowledge management) tools promise, and the current undisputed giants in that domain are Obsidian and Logseq. Each tool offers the capability to capture thoughts, make connections between notes, construct your personal knowledge base, and cultivate clearer thinking. Both are Markdown-based. Both are local-based. And both have devoted-or cultish, as it were- communities surrounding them. So which one should you choose? That depends completely on how you think, what you're building, and what you intend for your notes to become.
I'm not going to be offering any "it depends" answers. By the end of this post, you will clearly know where each tool excels and where it underperforms, as well as which persona truly fits each application.
I'd recommend trying both simultaneously for at least a month before making any decision. This way, you'll get a chance to try out all the features of these knowledge management tools.
What Is Obsidian?
Obsidian is a note-taking and knowledge management application designed around storing local plain Markdown files on your computer. It shipped in 2020 and rapidly rose through the ranks to become one of the most popular PKM applications in the world.
The philosophy behind Obsidian is very straightforward; all of your notes are simple .md files sitting on your computer that live inside of a directory, and you completely own the data. No proprietary format, no lock-in, no having to rely on the company behind it staying in business.
What has made Obsidian truly excel is its graph view that allows you to visualize the relationships between all of your notes and a large plugin community that allows you to extend Obsidian in practically any way imaginable.
Who makes Obsidian?
Obsidian is developed by Dynalist Inc. A relatively small team created by Erica Xu and Shida Li. Despite its relatively small size, its product has maintained a surprisingly high quality and incredibly fast development pace.
What Is Logseq?
Logseq is a privacy-focused and open-source knowledge management tool that approaches things differently. Where Obsidian thinks documents, Logseq thinks blocks.
Each log entry is initially a bullet point, a block. Logseq's blocks can be nested, referenced, queried, and linked across pages. Logseq was deeply inspired by Roam Research and implemented the outliner-first concept on top of an open-source, local-first application.
Logseq stores your data as raw Markdown files or as EDN files on your local system, ensuring you're not locked in. The free and open-source nature of the code gives users more transparency and trust compared to the closed-source nature of Obsidian.
Who is building Logseq?
Logseq was initially started by Tienson Qin and is now maintained by a community. However, the company has raised funds to create a database version of Logseq.
The Fundamental Difference in Philosophy
Before jumping into the feature-by-feature comparison, it's useful to understand the philosophical divide. This is the number one thing that's going to differentiate the two programs for you.
| Dimension | Obsidian | Logseq |
|---|---|---|
| Core unit | Document / Page | Block (bullet point) |
| Way of thinking | Document-first | Outline-first |
| Structure | Your own defined structure | Daily journals by default |
| Model | Proprietary (freemium) | Open-source |
| Workflow | Linked notes | Daily notes + block references |
Obsidian states: "Blank canvas, build what you will."
Logseq states: "Start typing in today's journal, everything else will follow."
Neither is better or worse, and I guarantee one will feel more natural than the other.
Interface and User Experience
Let's quickly take a look at the UI and UX summary of both of these tools.
Obsidian UI
On the surface, Obsidian is nothing more than a text editor. A blank canvas with a file tree on the left, an editor in the middle, and panels on the right.
Out of the box, Obsidian feels bare-bones. This is purposeful. You get a blank document and very simple theming. Most serious users spend some time customizing Obsidian with plugins and themes.
It is of moderate complexity. If you use something like VS Code, then Obsidian will feel like a similar program. If you come from an app like Evernote, it can take a day or two to get used to the markdown format.
Obsidian UI wins:
- Fast and responsive even with thousands of notes.
- Two panes for writing and previewing at once.
- Fantastic graph visualization tool for all of your notes and links.
- Customization: Obsidian's themes and CSS snippets are endless.
- The command palette is great for accessing nearly any feature (Ctrl + P or Cmd + P).
Logseq UI
Logseq's UI is built around the concept of the daily journal, and an all-knowing outline in your left sidebar. When you first load Logseq, you're dumped on today's date, with the presumption that you'll start writing there.
Every bit of text in Logseq is a bullet. Every thought, every task, every code block; it's all an item. This takes some getting used to coming from a document-based note-taker, but block-level linking is amazingly useful once you see the logic.
The interface is somewhat more "opinionated" than Obsidian's. Instead of a blank page that you shape, Logseq has more of a pre-formed structure with pre-defined workflows.
Logseq UI wins:
- A sidebar containing today's journal, your entire notebook, and some starred notes.
- Expand and collapse feature to manage very long notes.
- Built-in task tracking.
- Querying of your notes, and aggregation of notes into different forms.
- An all-in-one app flashcard system.
Note-Taking and Writing Experience
This is the tool’s biggest difference in practical application.
Writing in Obsidian
Obsidian is an editor, the type in which you open a note, write within it, and get formatted output. Full Markdown support, YAML frontmatter, callouts, embeds and more are available. The editing process is slick, especially with Live Preview (enabled since ver 0.13), which shows formatted text while you type without mode switching.
It’s great for:
- Long-form content (e.g. Drafts of blog posts, documentation, academic articles)
- Structured notes with sections and headers
- Summary notes for books, articles, etc
- Documenting projects
It’s as close to a dedicated writing/text editor and feels very much like working with files on your computer.
Writing in Logseq
Logseq is an outliner, meaning everything is entered in bulleted form, indented to show relationships and expanded upon. You indent to expand and outdent to move back up a level.
This either works amazingly well for certain types of people or incredibly badly. For those who naturally think in lists and hierarchies, like developers, academics, and students, it feels extremely natural. If you’re a "flowing prose" type of writer, the structure can get in the way.
What it excels at is quickly jotting down ideas and thoughts. The idea of "today’s journal entry" eliminates a level of friction in starting the process, because everything initially goes to that one place, and can be sorted/organized later. The "blank screen" is now "today’s date"; no need to decide the purpose of the note immediately.
Linking and Knowledge Graph
Both applications support bidirectional links, meaning that if you link note A to note B, then note B will also link back to A. This is the fundamental component of connected knowledge.
Linking in Obsidian
In Obsidian, you link notes using double brackets [[double brackets]]. A graph view displays all of your notes as nodes and links between notes as edges between them. Seeing a well-maintained Obsidian vault with a complex graph structure is incredibly satisfying.
Obsidian supports:
- Block references →
[[note^block-id]] - Heading references →
[[note#heading]] - Unlinked mentions
- Aliases for notes
In Obsidian, a graph is primarily a visualization tool, a good way to view isolated and emergent clusters, but not something you navigate with.
Linking in Logseq
The nature of linking in Logseq is block-based. You can reference either a specific block on a page, or an entire page. This level of specificity is not the default in Obsidian.
If you recorded an idea that you want to access again, say in an entry on your Tuesday daily note three weeks ago, you can link to that block in other notes. In Obsidian, you have to create a separate note and embed it in the block there, or use block IDs, which is not a smoother experience.
The graph view is available in Logseq as well and is very similar to Obsidian's. But Logseq's real potential for creating connected knowledge bases lies in its querying ability.
Queries and Data Aggregation
This is where Logseq has a clear advantage.
Logseq Queries
Logseq can take blocks from anywhere in your entire vault based on tags, properties, tasks, dates, etc. Essentially your own small database embedded in your note-taking app.
An example: To get all outstanding tasks tagged as #work:
#+BEGIN_QUERY
{:title "Incomplete Work Tasks"
:query [:find (pull ?b [*])
:where
[?b :block/marker ?marker]
[(contains? #{"TODO" "DOING"} ?marker)]
[?b :block/ref-pages ?p]
[?p :page/name "work"]]}
#+END_QUERYThis is a powerful feature, but requires a significant learning curve. The query language used, Datalog, is something few people will be able to pick up in a day.
For more simple filtering, Logseq also has a simple query language:
{{query (and (todo TODO) [[work]])}}Much more user-friendly, and this renders as a living list within your notes.
Obsidian Dataview Plugin
Obsidian has no built-in queries, but you can make it perform similar actions with a plugin. This is achieved with a plugin called Dataview.
// Show all notes tagged #book completed this year
TABLE author, rating, date-finished
FROM #book
WHERE date-finished >= date(2025-01-01)
SORT rating DESCDataview itself is easier to use, in my opinion, than the Logseq Datalog queries. The syntax is more similar to SQL; therefore, it's easier to read and learn. It also has strong integration with YAML frontmatter properties.
The functionality to query data is present in both tools. In Logseq, it is part of the system in the form of queries. In Obsidian, it requires a plugin. The functionality provided by the Dataview plugin is much easier to grasp for a new user.
Task Management
Let's see the task management features of both these tools.
Logseq as a Task Manager
Logseq has a robust task management feature. Any block can be a task; mark it with TODO, DOING, DONE, LATER, NOW, WAITING, or CANCELLED. It has support for scheduled, deadline, and priority attributes.
Since tasks are blocks, tasks naturally fit into your daily journal. Most Logseq users use it as their only task management tool.
There is a built-in task journal that automatically keeps track of your finished tasks, and your daily journal entry will clearly state when a task has been completed.
Obsidian as a Task Manager
Obsidian supports simple markdown checkboxes, like - [ ] task, but was not built to be a task manager. There is a Tasks plugin, however, and it provides recurring tasks, deadlines, priority, and custom views, etc.
Obsidian task management seems like a bolted-on solution, since task functions are tacked onto the note-taking tool. Tasks are inherently a part of Logseq, and this makes a huge difference.
If task management is a crucial part of your workflow, Logseq wins this argument decisively.
Plugin Ecosystems
Now, let's take a look at the plugin ecosystem of these tools.
Obsidian Plugins
Perhaps Obsidian's biggest advantage over Logseq is its ecosystem. It has thousands of community plugins and supports nearly any use-case one could imagine.
Handpicked Obsidian plugins
| Plugin | Description |
|---|---|
| Dataview | Query your notes as if it were a database. |
| Templater | Advance templating system using JavaScript. |
| Calendar | Display daily notes in a calendar format. |
| Excalidraw | Create drawings and diagrams in the Obsidian app. |
| Kanban | Boards in Obsidian. |
| Zotero Integration | Reference management of academic articles. |
| Advanced Tables | Improved table editing experience. |
| Periodic Notes | Generate weekly/monthly/quarterly notes automatically. |
| QuickAdd | Rapid capture of notes via macros. |
| Obsidian Git | Version your vault with Git. |
Some plugins are better than others, but there is no doubt that there are high-quality plugins in the ecosystem, and the developers/community are always active and creating.
Logseq Plugins
Like Obsidian, Logseq also has its own plugin marketplace, though considerably smaller. The core app itself is more feature complete out of the box (tasks, flashcards, queries), making the plugin gap seem less of a concern than it actually is.
Handpicked Logseq plugins
| Plugin | Description |
|---|---|
| Logseq Omnivore | Sync your web clippings/highlights. |
| Bullet Threading | Visual links connecting related blocks. |
| Agenda | Display tasks in a calendar layout. |
| Markdown Table Editor | Improved user experience for tables. |
| Heatmap | GitHub-style heatmap of your note-taking activity. |
| Smart Blocks | Templating of blocks. |
If the plugin you are looking for is a general one, then you are sure to find one in the Logseq plugin marketplace. But for some very niche features, Logseq might not have a solution, and instead, you may have to look to Obsidian's larger marketplace.
Sync and Collaboration
Moving ahead, let's compare the syncing and collaboration support of both apps.
Obsidian Sync
Obsidian provides its own 1st-party sync service at $8 a month (paid annually). This sync service is end-to-end encrypted, tracks history, and syncs across all your devices & operating systems.
You can also use:
- iCloud (Mac/iOS; it works to an extent)
- Google Drive/Dropbox (it works but it's easy to run into conflicts)
- Syncthing (Free; it is a great solution, peer-to-peer)
- Obsidian Git (sync over GitHub; mostly used by programmers)
Obsidian really isn't meant for teams. You can share a vault but not much else in terms of real-time co-editing.
Logseq Sync
Logseq has its own sync service for users. Sync has been more unstable for Logseq than it has for Obsidian; one reason for this is due to the nature of their file-based (as opposed to their block-based) operation.
Old Logseq users prefer to use:
- Git + GitHub (you should be familiar with the command line)
- iCloud/Dropbox (setup is a bit complex)
- Syncthing (works without issues)
Logseq, like Obsidian, has similar collaboration capabilities. The system is more inclined for personal use.
Conclusion: Syncing capabilities are better supported and more stable in Obsidian for now.
Performance and Scalability
If you work on large projects, performance and scalability are important.
Obsidian Performance
Because Electron (the same technology VS Code is based on) is used to build Obsidian, it’s a web application wrapped up in a desktop application. While some users have a negative reaction to this, Obsidian is fast. Obsidian has been tested with a vault with many tens of thousands of notes, and performance doesn't dip noticeably at all.
With massive graphs (over 5000 notes), the graph view may become slow, but the core editing and navigation experience remain unaffected.
Logseq Performance
Logseq is also an Electron-based application. Honestly, performance is where I struggled the most with Logseq. Once you have more than around 2000 pages in your graph, it feels noticeably slow; i.e., load times, search time, and responsiveness are all weaker compared to Obsidian on large graphs.
The team at Logseq is working on an entirely new database version of Logseq (the codename is DB version), and ditching flat files completely in favor of a real database backend, which will significantly improve the performance of Logseq.
Winner: Obsidian, for performance, especially in larger graphs.
Privacy and Open Source
This is a huge issue for many PKM users, and rightfully so.
Obsidian
It's proprietary software, yet data remains plain text (Markdown). Free to use (sync service is paid) and no data ever leaves if you do not sync with or publish on their servers.
The biggest issue is that you can't audit its software source code. You just have to trust.
Logseq
It's completely open source (MIT licensed); you can actually look at, copy, modify, and compile the software on your machine. And you can also examine and audit exactly what Logseq is doing with your data. Privacy-conscious individuals may see this as a win.
Data remains local as Markdown files. Software is fully auditable. It is essentially as private as it can get.
For anyone with serious concern regarding their data's ownership, e.g., researchers, journalists, security professionals, Logseq’s open-source nature makes it a preferred choice.
PDF Annotation and Research Workflows
Do these apps support PDF annotation? Let's find out!
Obsidian
There is no native PDF annotation support in Obsidian, but Annotator and the PDF++ plugins offer decent support for it. Together with Zotero (with the Zotero integration plugin), the combination of Obsidian and Zotero gives a researcher a killer workflow.
Logseq
Logseq comes with PDF annotation features out of the box. Simply open a PDF file from within Logseq, and highlighting text will add it as new blocks to the Logseq graph automatically. It's one of the most powerful (and hidden) features of the app.
Students and academics using the app and working a lot with research papers and other documents will see this feature as a real workflow enhancement.
Flashcards and Spaced Repetition
In this area, Logseq is the clear winner due to the built-in flashcard feature. Simply put #card or #flashcard at the end of any block to turn it into a flashcard. Logseq will then prompt you with it based on spaced repetition. This is the best method to actually remember what you write down.
Obsidian has no built-in flashcard feature. But there is the Spaced Repetition plugin which provides a similar experience.
The integrated flashcards of Logseq will reduce friction dramatically for students or anyone learning new stuff.
Pricing Comparison
No comparison is complete without taking a look at the pricing of the competing apps.
| Feature | Obsidian | Logseq |
|---|---|---|
| Core app | Free | Free |
| Sync | $5/mo ($48/year) | Free tier + paid sync |
| Publish | $10/mo ($96/year) | N/A |
| Commercial license | 50/year/user | N/A (open source) |
| Mobile apps | Free | Free |
Both are free for personal use. Obsidian offers paid commercial licenses ($50/user/year) for business use. Logseq is open source, so this restriction doesn't apply.
Mobile Experience
No modern application is complete without its mobile app version. Let's see what these tools have to offer when it comes to using them on a smartphone.
Obsidian Mobile
Mobile apps for Obsidian (iOS, Android) are good. It uses the same plugin system as desktop, so everything from your setup will just work. Performance on mobile is fine with a comfortable editing experience.
Syncing to mobile through Obsidian Sync is easy. Using iCloud or a third-party service is a little more complicated, but doable.
Logseq Mobile
Logseq Mobile app has been a while in works, and it has come very far. Still, it has a way to go to be as stable and feature complete as Obsidian Mobile.
At the time of writing this post, Obsidian wins out for workflows which are mobile-heavy.
Can You Use Both?
Some people do. As both tools work off plain Markdown files, you can in theory use the same folder in both. The only catch is that Logseq adds block IDs and properties to your Markdown file which appear ugly in Obsidian.
A better approach is using one for your main PKM, and the other one as a specialized-task tool. For example:
- Obsidian for writing long documents, detailed articles, or comprehensive explanations.
- Logseq for daily journaling or quick thought captures with regular day-to-day task management.
But most people tend to pick one and go deep. There's generally too much mental overhead to manage two systems.
Head-to-Head Comparison: Obsidian Vs Logseq
Let's finish with a head-to-head comparison of both these tools.
| Category | Obsidian | Logseq |
|---|---|---|
| Writing experience | ✅ Good for long writing | ❌ Outliner-focused |
| Tasks | ❌ Plugin required | ✅ Native |
| Plugins ecosystem | ✅ ~4,500+ plugins | ❌ ~300+ plugins |
| Performance on large vaults | ✅ Fast | ❌ Can lag |
| PDF annotation | ❌ Plugin required | ✅ Native |
| Flashcards | ❌ Plugin required | ✅ Native |
| Open source | ❌ Proprietary | ✅ MIT license |
| Sync reliability | ✅ Mature | ❌ Still developing |
| Mobile experience | ✅ Good | ❌ Improving |
| Queries/filtering | ✅ Dataview plugin | ✅ Native |
| Privacy | ✅ Local files | ✅ Local + open source |
| Customization | ✅ Flexible | ❌ Less flexible |
| Learning curve | Medium | Medium high |
Conclusion
After extensively comparing both the tools, here's the final verdict.
Go for Obsidian if:
- You frequently write long-form content.
- You want as many customization options as possible and an enormous plugin library.
- You take performance seriously when working with large vaults.
- You need solid synchronization across all your devices.
- You're a developer who wants a Git workflow.
Go for Logseq if:
- You tend to think in outlines and daily notes.
- You desire features like tasks, PDF markup, and flashcards integrated without a need for plugins.
- The fact that it's open-source matters to you, philosophically.
- You're a student or researcher with a huge volume of material to sift through.
- You want tighter coupling between your tasks and notes.
Neither tool is "better" than the other. They are based on two entirely different visions of knowledge organization, and the ideal one for you is the tool that aligns with the way your brain naturally works.
The bright side? You don't need to choose. Both tools can be tried without paying a dime.
