> ## Documentation Index
> Fetch the complete documentation index at: https://docs.getdecisional.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Welcome

> All you need to know about Decisional and its core capabilities

# Overview

Decisional is an AI Agent for financial work that is grounded on your data sources. Decisional is designed for serious knowledge work by emphasizing features that make collaborating with AI more **transparent**, **controllable** and **accurate**.

## How it works

Decisional helps you generate documents (memos) or tables (magic tables) by using data sources you provide. This can help you speed up all kinds of knowledge work but is particularly useful for:

* **Research** on data you provide to it (supported file types include web, pdf, docx, ppt, xlx) that is not limited by any number of sources
* **Data Extraction** into an AI spreadsheet called a **Magic Table** in ANY format and schema
* **Writing** narrative driven rich formatted documents called **Memos** which are focused on information you specify

Decisional lets you specify sources you deem trustworthy, using it to power content generated within the application with reduced hallucinations.

## Getting Started

You can make use of Decisional through `knowledge_engines`. Each `knowledge_engine` is a collection of `data_sources` that you provide. Every answer generated by Decisional in the knowledge engine is grounded on the `data_sources` provided to the `knowledge_engine` along with `citations` that link back to the original `data_source`

In order to create a `knowledge_engine` you need to login to the Decisional web app

1. Login or Sign Up by visiting [https://app.decisional.com/sign-in](https://app.decisional.com/sign-in)
2. Login to go to [https://app.decisional.com/knowledge-engines](https://app.decisional.com/knowledge-engines)

<Card title="Knowledge Engines" icon="arrow-right" href="/welcome/first-knowledge-engine" cta="/welcome/first-knowledge-engine">
  Learn more about Knowledge Engines and what they are used for
</Card>

<Note>
  You can also add new sources through the upload `data_sources` API in the API reference
</Note>