> For the complete documentation index, see [llms.txt](https://bruno-brandes.gitbook.io/cosmos-toggles/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://bruno-brandes.gitbook.io/cosmos-toggles/master.md).

# Introduction

> **Feature Toggles** (often also refered to as **Feature Flags**) are a powerful technique, allowing teams to modify system behavior without changing code. - Martin Fowler

**Cosmos Toggles** is a tool to allows that applications change behavior without new deployment through flags configuration with the [**Azure Cosmos DB SQL API**](https://docs.microsoft.com/en-us/azure/cosmos-db/create-sql-api-dotnet)**,** a Microsoft's globally distributed with guaranteed speed and performance.

![](/files/-M5Z_dLvhnl9-aPKz-Sn)

In March 6th, 2020 Microsoft pronounce new [Free Tier](https://bit.ly/3atWXbB) that allows get the first 400 RU/s throughput and 5 GB storage 100% free.