Alternatives to Recoll
Full-text desktop search across documents and mail, built on Xapian. The listings below can replace it for an important use case. Each note says what changes if you switch.
The original
Recoll
Full-text desktop search across documents and mail, built on Xapian.
Replacements
Listings that take over the same core job as Recoll.
DocFetcher
Desktop search that indexes the text inside documents, not just file names.
DocFetcher is also a free open-source indexed document search for Windows, macOS and Linux, runs as a Java application, searches inside archives and offers a portable mode.
AnyTXT Searcher
Local full-text search across documents, PDFs, code and ebooks on Windows.
AnyTXT Searcher keeps full-text indexing local with wide format coverage and instant previews, but it is closed source and runs on Windows only.
FileLocator Pro
Indexed content search for Windows with scripting and Office format support.
FileLocator Pro adds an optional index, Office and PDF extraction and scripting, but it is a paid per-user licence, closed source and limited to Windows.
dnGrep
Search file contents, documents and archives on Windows.
dnGrep searches text, documents and archives without Recoll's Xapian index, is open source under GPL-3.0, and is available for Windows only.
Agent Ransack
Searches file contents on Windows with regular expressions and boolean queries.
Agent Ransack searches file contents with regular expressions and boolean queries without building an index, so it is slower on large volumes and runs only on Windows.
Also worth comparing
These listings name Recoll as their own alternative, so the relationship runs both ways.
FSearch
Find Linux files quickly through an indexed desktop search.
Recoll moves from filename search to full-text indexing of documents and mail on Linux, Windows and macOS, relying on external helpers for some formats.
Similar software
Related functionality, not a direct replacement.
Everything
A free Windows search tool from voidtools that finds files and folders by name instantly.
EverythingToolbar
Puts Everything's instant file search directly on the Windows taskbar.
QuickLook
Preview selected Windows files by pressing the space bar.
plocate
A locate replacement that finds files by name in milliseconds using a trigram posting-list index.
Fluent Search
A Windows search launcher for files, apps, browser tabs, open windows and on-screen elements.