When comparing TagSpaces vs ThatFile, the Slant community recommends TagSpaces for most people. In the question“What are the best file managers for Windows?” TagSpaces is ranked 38th while ThatFile is ranked 42nd. 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 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.
Pro Advanced Features
Keywords, Global & local filtering. Search histories & directories. Main Nav Profiles - customize main nav items based on your workflow type.
Pro Tabs
Endless tabs that aren't clunky.
Pro Tagging
Tagging system that is highly customizable.
Pro True Miller Columns
Fast and consistent miller column population.
Cons
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.