When comparing Memosnag vs TagSpaces, the Slant community recommends TagSpaces for most people. In the question“What is the best cross-platform note-taking app?” TagSpaces is ranked 46th while Memosnag is ranked 63rd. The most important reason people chose TagSpaces is:
TagSpaces is free and open source making it easily extendable with the help of extensions.
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Pros
Pro Extremely simple and intuitive
The plugin is very easy to use. The social-media-like page layout makes it easy to navigate, while the drag-drop functionality, used to organize your content, is highly intuitive as an Evernote alternative.
Pro Automatic citations save time
Memosnag creates citations automatically, which saves the user a ton of time.
Pro Lets you save pretty much everything online
Unlike other clippers, memosnag allows you to save pretty much everything online in one simple click. That includes images, YouTube videos, websites, etc, which makes it a good Evernote alternative in this area.
Pro Open source
TagSpaces is free and open source making it easily extendable with the help of extensions.
Pro Your can choose your cloud file storage
Using only files and no databases let's you make the decision with which cloud file sync service to use, making sure your notes are made available on other devices and platforms. It works great with Owncloud, Nextcloud, Dropbox or Google Drive.
Pro No web service or database lock in
The backend is simply the directory and file structure on your harddrive.
Pro No cloud
TagSpaces is running completely offline, sending no data to any cloud based service, unlike many Evernote alternatives.
Cons
Con Comments can only be written in Latin script
You cannot add comments in Cyrillic, or Hebrew, or any language that uses symbols other than the Latin alphabet.
Con Does not work well for note taking
Memosnag is only for saving/sharing content you've found online (sites, videos, etc.).
Con It renames your files in order to tag them
The positive side of this drawback is that this way the tags are easily transferred to other platforms by simply syncing them.