When comparing DEVONthink vs OmniOutliner, the Slant community recommends DEVONthink for most people. In the question“What are the best Mac software for students?” DEVONthink is ranked 6th while OmniOutliner is ranked 10th. The most important reason people chose DEVONthink is:
File types containing text are indexed.
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Pros
Pro Can store any file type
File types containing text are indexed.
Pro Very flexible
An extensive feature set makes it easy to adapt to your work flow.
Pro Completely offline
Pro Sync
Sync between different macs and/or ios devices is fast, safe and easy. You can sync via iCloud, Dropbox, WebDAV or WiFi.
Pro Full text search
Pro Webpage Clipper
A flexible web clipper can add contents of any web page to DevonThink.
Pro One-time purchase vs monthly subscription.
Pro Paperless office functions available in PRO Office version
Includes processing of scanned documents, OCR etc.
The OCR function is based on FineReader and is probably the best one on the market.
Pro Fast
The application allows, for example, follow in real time a lecture while you structure your notes.
Pro Exportation options
Export it to Excel, Word, HTML, print it. There are many options for what you can do with your finished work.
Pro Customizable
Apply the style you want in your notes. Create columns, set the style only to a certain level, etc.
Cons
Con Only runs on Macs, iPoneOS, iPadOS & Web
It does not run on Windows, Android, and Linux.
Con Stores in a proprietary format
It stores the whole database in a proprietary file package, that you cannot easily access from another app or from the Finder. Considering you might be classifying a huge quantity of files there, it is quite problematic if you want to interact with this data from other applications.
Con Very limited automation
While the marketing claims are about an intelligent document manager, it actually does not offer many automation features, such as automatic classification, tagging and renaming of the files. It's much more like an extended file explorer.
Con Costs US$79.95 for just the Personal version
One-time purchase instead of monthly subscription.
Con Non free/libre (proprietary)
Con Very expensive
Like all Omni products, the OmniOutliner is very, VERY expensive.
There are two versions : Pro and standard . The first costs 99.99 and second 49.99.