A modern search engine with less complexity

Add enterprise-grade search to your .NET application without servers or setup

Film data and posters from TMDB. This product uses TMDB data but is not endorsed or certified by TMDB.

Indx uses a fundamentally better matching model: Identifying patterns in text instead of relying solely on exact word matches

Embeddable

Moves in with your .NET codebase

Open source toolkit available

End-to-end with .NET and React

Schema-less JSON workflow

Built-in type detection, nesting support, and simple field setup.

Field configuration
Field name and typeSearchableFilterableFacetableSortable
Title
String
Description
String
Actors
Array
Genre
Array
Rating
Number
ReleaseYear
Number

Index and search in a few lines of C#

Point Indx at your JSON, mark a few fields as searchable, and run your app.

csharp
using Indx.Api;
var engine = new SearchEngine();

// ANALYZE AND INDEX JSON
FileStream fstream = File.Open("movies.json", FileMode.Open, FileAccess.Read);
engine.Init(fstream);

engine.GetField("title")!.Searchable = true;
engine.GetField("description")!.Searchable = true;

engine.Load(fstream);
engine.Index();

// SEARCH
var result = engine.Search(new Query("matrix", 10));

Handle more real-world search behaviour with far less tuning

Drop an ultra-fast, pattern-based search engine directly into your .NET codebase
Pattern-based matching
Returns relevant search results automatically, even with messy or distorted input.
Great for AI agents
Fast structured retrieval for agent workflows and hybrid RAG pipelines.
Native C# engine
A fully embeddable search engine with no dependencies.
Zero tuning
No tokenizers, analyzers, or configs. Simple levers when you want control.
Blazing fast
As much as 200× faster than traditional search engines.
Boosts e-commerce sales
Smarter relevance leads to better product discovery and more conversions.
Split-word understanding
Handles combined and separated word forms automatically.
Battle tested
Trusted in high-load, high-volume production environments.

Community

Free

No usage limits. No feature gating.

Ideal for developers, startups, and teams who can self-support through documentation and community resources.

  • Community support
  • Open Source developer toolkit
  • Full production use allowed
Get a free license

Professional Support

€ 250/month

Priority support from the Indx team

Great for teams building applications where reliability matters.

  • Priority e-mail support
  • Integration & deployment guidance
  • Influence future priorities
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Enterprise SLA

Contact us

Guaranteed response times and dedicated support.

For mission-critical workloads. We'll ensure your search application succeeds.

  • Direct engineering access
  • Uptime SLA & guaranteed response times
  • Azure deployment assistance
Book a meeting