When comparing Simplenote vs Obsidian md, the Slant community recommends Simplenote for most people. In the question“What is the best cross-platform note-taking app?” Simplenote is ranked 4th while Obsidian md is ranked 11th. The most important reason people chose Simplenote is:
Simplenote takes a minimalist approach to its interface. There are no toolbars full of formatting options or extra features like notebooks to group notes. The entire desktop interface consists solely of a sidebar with your tags and trash filters, the list of existing notes with search, a button to add a new note and a simple view for looking an existing note or writing a new one.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Very simple and clean interface
Simplenote takes a minimalist approach to its interface. There are no toolbars full of formatting options or extra features like notebooks to group notes. The entire desktop interface consists solely of a sidebar with your tags and trash filters, the list of existing notes with search, a button to add a new note and a simple view for looking an existing note or writing a new one.
Pro Geared towards fast usage
Unlike alternatives (such as Evernote) that are laden with features, Simplenote is fast to use and sync. Reviews from the Verge, Lifehacker, and a variety of other sources all describe using the Simplenote apps as very fast. While it may not be as feature-rich as other apps, the responsiveness of the app and simple interface keep it easy to use while never slowing down the user when they need to quickly take a note.
Pro Works offline
Users can edit and create documents offline, can then sync their content the next time they are online. This way a user can work even when there's no data connection without the worry of losing work.
Pro Desktop app is open source
The desktop version of Simplenote is hosted on the GitHub and since it is open source, it can allow developers to fork the code in order to improve the app.
Pro Can export your data
The program enables exporting of notes as text documents.
Pro Collaborative features
Notes can be shared with others or worked on collaboratively.
Pro Open Source
All of the Simplenote apps are open source and ready for your contributions! You can find the source on GitHub:
iOS: https://github.com/automattic/simplenote-ios
Android: https://github.com/automattic/simplenote-android
macOS: https://github.com/automattic/simplenote-macos
Electron (Windows and Linux): https://github.com/automattic/simplenote-electron
Pro "Time machine" style revision control on the notes
Each edit of a note is saved in order to allow the user to go back to a previous version of a document. This way, if mistakes are made or something is deleted, you can go back to the previous version without any hassle.
Pro Wide range of great clients with great sync
Official native apps are available on popular platforms such as Android, iPhone, iPad, Kindle, OS X, Windows and Linux. Open-source clients extend this support even more widely to various other platforms, such as webOS and the BlackBerry PlayBook. These apps embody the core philosophy of Simplenote: minimalism and focus on the note taking.
There are multiple unofficial clients (including the excellent Notational Velocity and NValt, a fork of the app with markdown support and other goodies.)
Pro Markdown support via web interface
There is support for Markdown when using the web app. This can be convenient for those who want to use Markdown in a particular note.
Pro Linux client available
Pro Excellent iOS app
Pro Excellent desktop client in the form of nvAlt
Pro Locally stored, not dependent on cloud
Everything is stored in your device. You can back them up, encrypt and process however you want to. Works completely offline. Read your notes anytime, anywhere.
Pro Markdown makes for flatter learning curve
Pro Lightweight and very customizable
Variety of settings, and community themes & plugins, available from built-in marketplace. Every community plugin is open-source which means you can learn from it and develop your own.
Pro Backlinking
This allows you to link notes back and forth really easily.
Pro Fast growing
It's becoming more powerful everyday, it seems like they add many functions within several days.

Pro Cross-platform: works on Linux, MacOS, Windows, Android and iOS
Pro Very easy to use and link notes, preserves the standard form of markdown
Linking notes is a game changing feature. Very easy to use and link notes. Their implementation of markdown doesn't deviate from the standard form of markdown and so the same files can be used by other markdown programs without any consequence.
While renaming note link still works.
Pro Multiple Vaults
A Vault in Obsidian is like a database. Internal links and files are not shared across Vaults. Each Vault is opened with a separate instance of Obsidian. Each Vault can have its unique app settings and plug-ins. Useful if you have distinct/unrelated projects or "data spaces" requiring different workflows and data relations.
Pro In-line tagging
Ability to tag-as-you-write and find each occurrence of a tag in the entire vault makes it very easy to organize and retrieve notes. Supports nested tags.
Pro Infinite panes, split panes, lock panes
In Obsidian, pane = window = note = page
Obsidian allows you to open as many notes as you can fit concurrently in your screen. You can split a pane horizontally/vertically. You can lock/link panes so they scroll in sync, useful for and edit & preview modes.
Pro Functionality extensions with a growing number of plugins
Also open for anyone to develop their own extensions/plugins.
Pro Daily Notes with template
Daily Notes plug-in, when clicked, generates a new note with the current date. Great for journaling and reduces friction in your writing habit.
You can create a custom template for your Daily Note.
Pro Helps visualize personal knowledge in ways nothing else allows
The Graph view is more than an aesthetic gizmo. It allows you to grasp and recognise clusters of information, follow branches and easily filter out what you don't want to see. The "animate" option shows how your notes and links have grown organically. With a bit of tweaking to the visuals and the proper theme, your graph might even start to look like a disturbingly "alive", eerie thing.
Pro Random note
A plugin that, when clicked, surfaces a random note from your vault.
Pro Support for tags
Pro Readable as it hides the [[ ]] around links when in Preview mode
This is a big difference, as having to read through long-form texts laden with [[links]] gives friction.
Pro Slides for giving presentations from within Obsidian
Easily turn your notes into simple yet sleek powerpoint-style presentations by enabling the Slides plugin and adding the --- separator.
Pro Markdown rather than outline/blocks
Pro Keyboard shortcuts, Vim key bindings
Hotkeys can be customized in settings.
Can switch on or off Vim key bindings in the editor settings.
Pro Great onboarding experience
The onboarding consists of well-written help documentation (saved as a vault) served in small chunks and organized systematically so that you become familiar with all its features as well as get hands-on experience in real time.
Pro Community of developers building themes and plug-ins
Due to the tool being very developer-friendly, there are tons of cool developments being made to it by 3rd party devs.
Pro Page previews on hover
When you hover on an internal [[link]], you get to preview the note without opening it on a new pane.
Page preview plugin must be enabled.
Pro Intuitive and easy to use with an excellent help system built-in
The app doesn't frustrate the user - the built-in help is excellent.
Pro Embedding attachments, such as PDF
Variety of file formats are directly embedded in the markdown preview, e.g. markdown, image, audio, video and PDF files.
Pro Exporting as PDF
Allows exporting your markdown files as PDFs rendered with all of your plugins.
Pro Calendar
Daily and Weekly notes with Calendar Plugin.
Pro Graph view
A pretty, alternative way to represent links between your notes.
Pro Multiple cursors
A feature unseen in other tools.
From the help doc, "This can be useful when modifying a lot of lines in the same way, for example putting - at the beginning of multiple lines to turn them into a list, or appending [[ to a series of links you’ve copied from elsewhere."
Pro Can copy search results and paste as lists and/or links in a new or existing note
Pro Advanced search
Supports extended searching by default. Community plugin called "Vantage" allows to make more advanced queries.
Pro Git integration
Version Control for your vault with Obsidian Git plugin.
Pro Aliases
Allows to refer to a note with multiple names.
Pro Big and helpful community
There's a Discord server and a forum. Join the community!
Pro Not locked to a provider
No lock-in to a certain company - just markdown files on disk.
Pro Mindmaps
Available as a plugin.
Pro Math
Uses MathJax.
Pro Templates
Allows to create templates with built-in plugin. There's also powerful community plugin called "Templater".
Pro Diagrams
Uses Mermaid.
Pro Linking to blocks
You can link to a block - e.g.: paragraph, blockquote, heading.
Pro Metadata
Add a custom metadata to a note with YAML front matter.
Pro Sketching
With Excalidraw.
Pro Academic citations
Supports Citations and provides inserting from Zotero.
Pro SQL-like queries
Advanced queries for the data-obsessed with Dataview Plugin.
Pro Workspaces
Saving and loading workspaces.
Pro Built-in Audio Recorder
Pro Folders and file level storage which is open to manage, does not lock navigation
With other options like notion, we can not see how the data is actually stored.
Pro HTML Support
Use HTML in a note.
Pro Incredible tool for PKM (Personal Knowledge Management) which allows anyone who has a computer and an internet connection to think better and create new insights
Pro Helps with planning and organization.
Variety of planning and organization plugins, such as Kanban boards or Day Planner.
Pro Supports importing from other tools
Supports importing from tools such as Notion, Evernote, OneNote, Apple Notes, Bear, Zkn3, TiddlyWiki 5, and Roam Research. Refer to Obsidian Help for more info.
Pro Supports several languages
Translations are made by the community at GitHub repository.
Pro Discord rich presence
Update your Discord status to show your friends what are you working on with Discord Rich Presence plugin.
Pro Syntax highlighting for code blocks
Pro Snapshots, file recovery, trash folder
Pro Copy and paste images easily
When taking notes, you can just grab a print screen from your clipboard and paste into the notes without having to do any file management
Cons
Con No note encryption at rest
Notes are encrypted in transit, but remain unencrypted on Simplenote's servers.
Con Limited ways to reorder notes
You are able to sort your notes alphabetically, date modified, or by last created. There is no way to drag and drop the notes to create a custom order.
Con No reminders
You cannot set reminders to revisit a specific note or complete a task.
Con No support for file attachments
Simplenote doesn't provide support for embedded attachments. This can limit the use for some as many other note-taking apps do support this type of feature.
Con Search is limited to one tag
There seems to be no way to find notes that have both tag X and tag Y. This isn't a big deal until you have a large library of notes, and want to cross-search for two things at the same time to vastly narrow down your search.
Con No way to import notes from anywhere
Con Web access only for updated browsers
They recently removed support for older browsers, and it's not working on the latest version of Waterfox. You need an updated version of a well-known browser.
Con No 32-bit version
Con The search function doesn't see tags
If you search for 'foo' you won't find notes with tag foo. In that regard, tags are completely isolated from the search.
Con No way to bulk-apply a tag
This is a typical workflow action in other apps: Do a search, multi-select notes among the matches, then apply or de-apply one or more tags to all these notes at once.
There's no way to do this in Simplenote. The only bulk operations are Delete and Pin-to-top.
Con No notification when changes made on a shared note
Currently, there is no way to be alerted when a change is made by another contributor on a shared note.
Con Save-to-disk feature is poor
The only way to download your data off Simplenote is via a "download zip" feature that unfortunately loses all the semantic structure of your data (tags, for instance).
Con No integrated social media sharing
The only way you can share notes with others is with a link you're given when you publish your note. There is no integrated social media sharing if you directly want to post your note to Twitter, Facebook, etc.
Con Lack of color impacts usability
There are two themes available, the default theme and a dark theme.
Both use only the single solid color (either white or black) for the background, so there is a lack of visual cues to separate what you're looking at.
Con Closed Source
Con Needs to be better at block level references, searches, tagging
For example, if you want a tag a block of text, for obsidian, its the whole page that will get tagged.
Con Proprietary software lock-in
Creates dependence on the application with the promise that the content is yours but that cannot be entirely true without the application being free and open source software. You will end up altering the way you create the content to take advantage of Obsidian features and your processes will evolve for its workflows. This replicates the lock-in pain that people experience moving their highly personal information from one proprietary platform to the next when that initial platform stops serving them well, goes out of business, or becomes a bad actor.
Con Does not export to MS Word
Can export only as a PDF file.
Con Requires .md files
Can't read .txt or other plaintext file formats. Can't read asciidoc files.
(Available with a plugin.)
Con No ability to add dates that link to a daily note, when that day/note may not yet exist
You can create a backlink which doesn't yet exist; it just doesn't auto-fill for you. (Available as a plugin)
Con Too many plugins
Con iOS version works only with icloud
Does not work with other cloud folders.
Con Needs to be polished
They still need time to fix some bugs.
Con V1.0 release is terrible
Don't download unless you can't find pre 1.0 version.
