Freedom251 › Content Management Systems
Nucleus CMS
What Nucleus CMS is
Nucleus CMS is a free, open-source .NET Core and MVC web application framework and content management system. It manages text and HTML, static content, documents, links, multiple content types, media, and pages. Pages can be arranged hierarchically, given metadata and layouts, assigned paths or redirects, and protected with role-based view or edit permissions. Built-in permissions cover roles, groups, users, assignments, and API access rights. Nucleus automatically indexes content for full-text search, while extensions can add search providers and other capabilities. Extensions install from inside the application, and .NET developers can extend layouts, modules, search, and file-system providers. Listed integrations include OAuth and SAML single sign-on, Azure Storage, Amazon S3, Google Analytics, Elastic Search, Azure Search, Typesense, and Google Custom Search. Hosting options include Windows, Azure App Service, Docker, and Linux. Supported databases include SQL Server, SQLite, MySQL, MariaDB, and PostgreSQL. OpenTelemetry and OpenMetrics provide metrics; logging and tracing instrumentation are not implemented.
Who it suits
Nucleus CMS suits teams needing a self-hosted .NET content system with structured pages, permissions, search, and extensibility. It also fits developers building custom modules or providers.
What it does well
- Free under the MIT license
- Role-based page and API permissions
- Built-in full-text content search
- Multiple hosting and database options
- Extensions install within the application
What to know first
- Logging and tracing instrumentation are not implemented
- Self-hosting requires deployment management
- Extension development targets .NET developers
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Nucleus CMS | Open-source CMS under the MIT license | Free |
As nucleus-cms.com lists them, read 12 Oct 2026. The maker's own page has the final word.
Verdict
Nucleus CMS covers content, page governance, search, and developer extension work in a self-hosted .NET package. Its metrics support is documented, while logging and tracing instrumentation remain absent.
Facts from Nucleus CMS's own pages
- Access control
- Built-in role-based permissions let administrators manage roles, role groups, users, role assignments, and API access rights. · nucleus-cms.com, 12 Oct 2026
- Content management
- It includes modules for text and HTML, static content, documents, links, multi-content, and media, plus page management tools for metadata and permissions. · nucleus-cms.com, 12 Oct 2026
- Custom user roles
- Yes · nucleus-cms.com, 23 Sept 2026
- Databases and storage
- Supported databases listed are Microsoft SQL Server, SQLite, MySQL, MariaDB, and PostgreSQL; files can be stored locally, on a file server or SAN, or in Azure Storage or Amazon S3. · nucleus-cms.com, 12 Oct 2026
- Developer tools
- The free Nucleus Developer Tools include Visual Studio templates, code analyzers, code fix providers, and MSBuild tasks for extension developers. · nucleus-cms.com, 12 Oct 2026
- Downloads
- Install sets are listed for Windows x64, Linux ARM64, and Linux x64, plus a portable set for other platforms that support .NET Core. · nucleus-cms.com, 12 Oct 2026
- Editing
- Editing mode provides controls to edit module content and settings, move modules, and make inline changes to supported module content. · nucleus-cms.com, 12 Oct 2026
- Extensible
- Users can install extensions from within the application, and .NET developers can build web applications and extend layouts, modules, search, and file system providers. · nucleus-cms.com, 12 Oct 2026
- Free plan
- Yes · nucleus-cms.com, 23 Sept 2026
- Hosting
- The maker lists Windows, Azure App Service, Docker, and Linux hosting options. · nucleus-cms.com, 12 Oct 2026
- Integrations
- Listed extensions include OAuth and SAML single sign-on, Azure Storage and Amazon S3 file storage, Google Analytics, and search providers such as Elastic Search, Azure Search, Typesense, and Google Custom Search. · nucleus-cms.com, 12 Oct 2026
- Maker
- Inventua says it develops custom software solutions and identifies itself as the developer of Nucleus CMS. · inventua.com, 12 Oct 2026
- Observability
- Nucleus supports OpenTelemetry and OpenMetrics metrics, including a metrics endpoint and optional export to an OpenTelemetry collector; logging and tracing are not currently implemented as instrumentation features. · nucleus-cms.com, 12 Oct 2026
- Page management
- Pages can be organized hierarchically, configured with metadata and layouts, assigned paths and redirects, and given role-based view or edit permissions. · nucleus-cms.com, 12 Oct 2026
- Platform type
- self_hosted · nucleus-cms.com, 23 Sept 2026
- Product
- Nucleus is an open-source .NET Core/MVC-based web application framework and content management system. · nucleus-cms.com, 12 Oct 2026
- Search
- The extensible search system automatically indexes content and provides full-text search. · nucleus-cms.com, 12 Oct 2026
- SEO tools
- Yes · nucleus-cms.com, 23 Sept 2026
Where Nucleus CMS stands on Freedom251
- Content Management Systems#85 of 165