Unlost

At a glance

• Editor score
  4.8 / 10
• Pricing
  Free plan
• Best for
  Users organizing documents in watched local folders
• Free plan
  Yes
• Paid from
  Free
• Content search
  Yes
• Facts checked
  23 Sep 2026

• Where it wins

  • Searches file contents and names across selected folders and subfolders
  • On-device AI summarizes files and extracts metadata
  • Filters, duplicate detection, and expiry alerts aid document organization

• Where it doesn't

  • Indexes only user-selected local folders and subfolders
  • Available for Windows and Linux only
  • AI analysis is limited to supported files

Our verdict on Unlost

Unlost is a desktop file indexer for people who want to search documents by their contents as well as their names. It runs in the background on Windows and Linux and indexes user-selected local folders and subfolders, making it most relevant to solo users or small setups with documents kept on those devices. Search can use words, phrases, names, document types, dates, and tags, rather than relying only on filenames.

Its document organization features go beyond retrieval. An on-device AI model analyzes supported files to produce summaries and extract metadata such as document types, people, organizations, dates, and amounts. Users can edit indexed metadata and re-index files. Filters include document type, date range, and tags; the app also detects duplicates by comparing checksums, lists recently indexed files, and alerts users about documents with approaching expiry dates. According to the vendor, indexing and search happen locally and files are not uploaded. That local scope will appeal to people who want their searches and document analysis to stay on their machine.

Unlost is free, so there are no paid tiers to compare. The trade-off is its bounded scope: it searches selected local folders rather than presenting itself as a broader search service, and it is limited to Windows and Linux. The published description also limits AI analysis to supported files. Choose it if your documents are organized in watched local folders and content search, metadata, and duplicate detection are useful; look elsewhere if you need a wider platform or search beyond those folders.

Your product? Our editors can test Unlost in depth and publish a review, labelled as paid · from $149/mo →

Unlost pricing

Unlost fact sheet

Alternatives to Unlost

• EverythingA free Windows search utility for instant filename and path discovery.9.3
• Copernic Desktop SearchA Windows search tool for broad local, network, email, and cloud indexing.9.2
• DocFetcherA free, portable full-text search tool for local files, archives, and PST email.9.0

See all Unlost alternatives →

Featured on iTechGuides

Unlost is listed in our Desktop Search Software directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update