Alternatives to Agent Ransack
Searches file contents on Windows with regular expressions and boolean queries. The listings below can replace it for an important use case. Each note says what changes if you switch.
The original
Agent Ransack
Searches file contents on Windows with regular expressions and boolean queries.
Replacements
Listings that take over the same core job as Agent Ransack.
FileLocator Pro
Indexed content search for Windows with scripting and Office format support.
FileLocator Pro is the paid per-user version that adds an optional index, Office, PDF and archive content extraction, and scripting on Windows.
dnGrep
Search file contents, documents and archives on Windows.
dnGrep is free and open source under GPL-3.0 and searches plain text, supported document formats and archives, and remains Windows only.
AnyTXT Searcher
Local full-text search across documents, PDFs, code and ebooks on Windows.
AnyTXT Searcher builds a local full-text index across documents, PDFs, code and ebooks with instant previews, though the first index on a large drive is slow.
DocFetcher
Desktop search that indexes the text inside documents, not just file names.
DocFetcher is an open-source Java indexer for Windows, macOS and Linux that searches inside documents and archives, with a portable mode and a dated interface.
Recoll
Full-text desktop search across documents and mail, built on Xapian.
Recoll is a Xapian-based open-source indexer for Windows, macOS and Linux with mail folder support and a query language, relying on external helper programs for 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.
FSearch
Find Linux files quickly through an indexed desktop search.
EverythingToolbar
Puts Everything's instant file search directly on the Windows taskbar.
Fluent Search
A Windows search launcher for files, apps, browser tabs, open windows and on-screen elements.
Meld
A visual diff and merge tool for files, folders and version-controlled projects, with two-way and three-way comparison.