The best File Search alternative to Hydrus is TagStudio, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 10 alternatives to Hydrus and four of them are File Search Utilities so hopefully you can find a suitable replacement. Other interesting File Search Utility alternatives to Hydrus are TagSpaces, Eagle and Tagfs.
TagStudio is a photo & file organization application with an underlying tag-based system that focuses on giving freedom and flexibility to the user. No proprietary programs or formats, no sea of sidecar files, and no complete upheaval of your filesystem structure.
Privacy-first, multi-device organizer for files and folders with customizable tags, color labels, note editing in markdown or HTML, Kanban boards, S3 object storage support, web page clipping, vendor lock-in free filename tagging, open source option, and multi-format preview.
Multi-format solution for managing, searching, and organizing images, videos, audio, and fonts with advanced tags, folders, smart folders, color filters, and over 90 design file previews. Features browser integration, annotations, and creative workflow support.
Germany
EU
Taiwan