A **Qlik Sense mashup** is a web application that allows you to integrate Qlik Sense visualizations into a fully custom-built web environment.

From a technical perspective, a mashup is developed using standard web technologies such as **HTML, CSS, and JavaScript**, combined with the **Qlik Sense Capability APIs**. These APIs provide access to Qlik objects (such as charts, KPIs, and sheets), which you can embed and control within your own application.

Communication with Qlik Sense is handled via the **Engine API (WebSocket-based)**. This enables dynamic data retrieval, selections, filtering, and user interactions as if you were working directly in the Qlik Sense client.

A typical mashup consists of:

* a **frontend** (custom user interface)
* Qlik Sense **object IDs** that are embedded into the page
* JavaScript libraries such as *qlik.js* or *enigma.js*
* optionally a **proxy setup** for authentication and secure access to the Qlik Engine

The main advantage is that you have full control over the user interface and user experience, while still leveraging the powerful associative data engine of Qlik Sense.

In short, a mashup acts as a bridge between Qlik Sense and a custom web application, enabling you to embed analytics seamlessly into other digital platforms.