# Getting started

> A collection of getting started guides to start with the BFF

Currently, the most recent version is 4 (preview 2). If youâre upgrading from a previous version, please check our [upgrade guides](/bff/upgrading).

If youâre starting a new BFF project, consider the following startup guides:

* [Single frontend BFF](/bff/getting-started/single-frontend/)
* [Multi-frontend BFF](/bff/getting-started/multi-frontend/)
* [Blazor](/bff/getting-started/blazor/)

## Applying the Duende Backend for Frontend (BFF) Security Framework

[Section titled âApplying the Duende Backend for Frontend (BFF) Security Frameworkâ](#applying-the-duende-backend-for-frontend-bff-security-framework)

[YouTube video player](https://www.youtube.com/embed/6zMSwlGBmxs)
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