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BrightstarDB

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What BrightstarDB is

BrightstarDB is a native RDF database for the .NET platform. It stores and integrates data using a schema-less RDF model, and can run embedded in an application or as a server accessed through a RESTful HTTP API or .NET client API. Its core libraries have a small footprint and install with zero configuration for embedded use. BrightstarDB implements the SPARQL query language, update language, and protocol, and supports SPARQL 1.1 endpoints. Supported RDF formats include N-Triples, N-Quads, RDF/XML, Turtle, RDF/JSON, N3, and TriX. For strongly typed .NET applications, its RDF ORM includes a LINQ provider that maps domain model queries to SPARQL and supports CRUD and querying. The ORM, LINQ to SPARQL, and dynamic objects API can also connect to SPARQL 1.1 endpoints. Its append-only store allows queries or reversion to earlier transaction points; periodic coalescing can remove old points to manage file growth. A single-writer, concurrent-reader model allows reads to continue during writes. BrightstarDB is free and licensed under MIT for commercial and non-commercial use, with releases available through NuGet and GitHub. Community support is available through GitHub issues, and commercial support is available from NetworkedPlanet. Security features are described as basic and customizable, and service access controls are a work in progress.

Who it suits

BrightstarDB suits developers building .NET applications that store RDF data, especially those using strongly typed models, LINQ, or SPARQL endpoints. It can also suit projects that need an embedded database or a self-hosted server and can work within its documented security model.

What it does well

  • Free and licensed under MIT for commercial and non-commercial use.
  • Supports embedded use and server deployment.
  • Implements SPARQL query, update, and protocol.
  • LINQ provider supports strongly typed .NET CRUD and queries.
  • Reads continue while writes occur.
  • Supports seven listed RDF formats.

What to know first

  • Security features are described as basic and customizable.
  • Service access controls are a work in progress.
  • Shared-secret server authentication is not yet implemented.

Getting started

  1. Visit the BrightstarDB website.
  2. Get a release through NuGet or GitHub.
  3. Choose embedded use or run it as a self-hosted server.
  4. For a server, access it through the RESTful HTTP API or .NET client API.
  5. Connect using the RDF ORM, LINQ to SPARQL, or dynamic objects API where applicable.

Verdict

Choose BrightstarDB for a free, MIT-licensed RDF database when your application uses .NET, SPARQL, or RDF endpoints. Its embedded and server deployment options, LINQ provider, and concurrent reads are useful capabilities. Look elsewhere if your requirements depend on more mature service access controls or server-side shared-secret authentication.

Questions

How much does BrightstarDB cost?

BrightstarDB is free and has a free plan.

Is BrightstarDB open source?

Yes. It is licensed under MIT for commercial and non-commercial use.

Which platforms does BrightstarDB support?

Its listed platforms are Android, API, iOS, Linux, macOS, self-hosted, and Windows.

Can BrightstarDB connect to other SPARQL endpoints?

Its ORM, LINQ to SPARQL, and .NET dynamic objects API can connect to endpoints implementing SPARQL 1.1 standards.

How can I get BrightstarDB?

Releases are available through NuGet and GitHub.

What support is available?

Community support is available through the GitHub issue tracker, and commercial support is available from NetworkedPlanet.

Facts from BrightstarDB's own pages

Authentication
The documentation says authentication is handled by the host application; IIS Basic or Windows Authentication can protect an IIS-hosted service, while shared-secret authentication is described as not yet implemented on the server. · brightstardb.readthedocs.io, 7 Oct 2026
Concurrency
BrightstarDB uses a single-writer, concurrent-reader model, and reads are not blocked while writes occur. · brightstardb.readthedocs.io, 7 Oct 2026
Data model
It uses a schema-less RDF data model for storing and integrating data. · brightstardb.com, 7 Oct 2026
Deployment
It can run embedded in an application or as a server accessed through a RESTful HTTP API or .NET client API. · brightstardb.com, 7 Oct 2026
Developer APIs
Its ORM for RDF includes a LINQ provider that maps application domain model queries to SPARQL and supports CRUD and querying in strongly typed .NET applications. · brightstardb.com, 7 Oct 2026
Downloads
The official site says releases are available through NuGet and GitHub. · brightstardb.com, 7 Oct 2026
Embedded use
The site says its core libraries have a small footprint and install with zero configuration for embedded applications. · brightstardb.com, 7 Oct 2026
External stores
Its ORM, LINQ to SPARQL, and dynamic objects API can connect to any endpoint that implements SPARQL 1.1 standards. · brightstardb.com, 7 Oct 2026
License
The project is licensed under MIT for commercial and non-commercial use. · brightstardb.com, 7 Oct 2026
LINQ and ORM
Its RDF ORM maps application domain model queries into SPARQL and provides CRUD and query capability for strongly typed .NET applications. · brightstardb.com, 7 Oct 2026
Open source license
BrightstarDB is licensed under MIT for commercial and non-commercial use. · brightstardb.com, 7 Oct 2026
Other endpoints
Its ORM, LINQ to SPARQL, and .NET dynamic objects API can connect to SPARQL endpoints implementing SPARQL 1.1 standards. · brightstardb.com, 7 Oct 2026
Platforms
The official site lists Windows, Linux, OSX, Windows Phone, Android, and iOS; the portable library documentation lists .NET 4.5, Silverlight 5, Windows 8, Windows Phone 8.1, Android, iOS, and MonoTouch. · brightstardb.com, 7 Oct 2026
Product
BrightstarDB is a native RDF database for the .NET platform. · brightstardb.com, 7 Oct 2026
Queries
It implements the SPARQL query language, update language, and protocol. · brightstardb.com, 7 Oct 2026
Security
The documentation describes security features as basic and customizable, and says service access controls are a work in progress. · brightstardb.readthedocs.io, 7 Oct 2026
SPARQL
It implements the SPARQL query language, update language, and protocol. · brightstardb.com, 7 Oct 2026
Storage behavior
The append-only store supports querying or reverting to earlier transaction points, while periodic coalescing can manage file growth by removing previous transaction points. · brightstardb.readthedocs.io, 7 Oct 2026
Support
The official site says community support is available through the GitHub issue tracker and commercial support is available from NetworkedPlanet. · brightstardb.com, 7 Oct 2026

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