IndxSearchLib 4.1.0-rc1

.NET 9.0 This package targets .NET 9.0. The package is compatible with this framework or higher.
This is a prerelease version of IndxSearchLib.
There is a newer version of this package available.
See the version list below for details.
The owner has unlisted this package. This could mean that the package is deprecated, has security vulnerabilities or shouldn't be used anymore. 
dotnet add package IndxSearchLib --version 4.1.0-rc1
                    


                    

                
NuGet\Install-Package IndxSearchLib -Version 4.1.0-rc1
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package. 
<PackageReference Include="IndxSearchLib" Version="4.1.0-rc1" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="IndxSearchLib" Version="4.1.0-rc1" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="IndxSearchLib" />
                    


                            Project file
For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package. 
paket add IndxSearchLib --version 4.1.0-rc1
                    


                    

                
#r "nuget: IndxSearchLib, 4.1.0-rc1"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package. 
#:package IndxSearchLib@4.1.0-rc1
#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package. 
#addin nuget:?package=IndxSearchLib&version=4.1.0-rc1&prerelease
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=IndxSearchLib&version=4.1.0-rc1&prerelease
                    


                            Install as a Cake Tool

IndxSearchLib

v4.1.0

Indx is a high-performance, embeddable search engine for developers working with structured data. Built from the ground up for speed, typo tolerance, and ease of use.

Whether you're building a modern SaaS platform, a high-throughput microservice, or a lightning-fast local app, Indx is designed to drop in and just work.

Indx differs from other search libraries by using a pattern recognition system rather than a lexical model. It identifies fragments of repeating structure — where the shape and length of the pattern influence recognition — enabling powerful text matching across variations.

V4 At a Glance

  • Pattern recognition search that handles large typos
  • Instant search as you type
  • Schemaless JSON indexing with support for nesting
  • Filters, Facets, Weights, Sorting, Boosting
  • Lightweight software with minimal resource usage

V4.1 New features

  • Filter caching
  • Filter preloading
  • Word indexing for deep queries
  • Hibernation
  • Exclusive filtering
  • Process monitor with performance control

Get Started

Documentation: Indx v4.1 Documentation.

Download example apps to see how to use IndxSearchLib here:

License & Support

IndxSearchLib is free for production use, including commercial applications.

Free Tier

  • Free for any use case (personal, commercial, production)
  • Unlimited documents with free registration (100k limit without registration)
  • No support guarantees or SLA
  • Community resources and documentation only

Free License Registration

To unlock unlimited documents, register for a free license. Registration is free and gives you a license file that removes the document limit.

Place the license file in your project and load it like this:

var engine = new SearchEngine("indx.license");

For teams requiring guaranteed support and SLA commitments, we offer:

  • Professional Support: Email-based technical support with priority response times
  • Enterprise Support: SLA, direct engineering access, rapid response, and dedicated contact

Contact us at post@indx.co for pricing. See LICENSE.md for full terms.

Product Compatible and additional computed target framework versions.
.NET net9.0 is compatible.  net9.0-android was computed.  net9.0-browser was computed.  net9.0-ios was computed.  net9.0-maccatalyst was computed.  net9.0-macos was computed.  net9.0-tvos was computed.  net9.0-windows was computed.  net10.0 was computed.  net10.0-android was computed.  net10.0-browser was computed.  net10.0-ios was computed.  net10.0-maccatalyst was computed.  net10.0-macos was computed.  net10.0-tvos was computed.  net10.0-windows was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

NuGet packages (1)

Showing the top 1 NuGet packages that depend on IndxSearchLib:

Package Downloads
Infidex.Benchmark

Package Description

GitHub repositories (1)

Showing the top 1 popular GitHub repositories that depend on IndxSearchLib:

Repository Stars
lofcz/Infidex
The high-performance .NET search engine based on pattern recognition.
Version Downloads Last Updated
4.1.2 37 1/16/2026
4.1.1 87 1/7/2026
4.1.0 172 12/22/2025
4.0.1 217 6/4/2025
4.0.0 264 4/15/2025
3.3.0.9 244 4/15/2025

- Release Candidate
     - Field definition "Indexable" is now "Searchable"