DEVONthink
Evernote
DTSearch

Features to Look for

Automatic update of indexing

Upon detection of change

At predefined intervals

MacOS

• 🔥 DEVONthink
  • with Proximity search
• FoxTrot
  • with Proximity search
• HoudahSpot
  • no Proximity search
• EasyFind

Articles

• Search Without Spotlight (https://www.macdrifter.com/2015/01/searching-without-spotlight.html)