# Soda Core (v3)

{% hint style="success" %}
This is the documentation for **Soda Core v3**. If you are using Soda v4 or want to learn more about Soda Core v4 - Data Contract Engine, head to the [Soda Core v4 documentation](https://app.gitbook.com/s/A2PmHkO5cBgeRPdiPPOG/reference/cli-reference).
{% endhint %}

**Soda Core** is a free, open-source Python library and CLI tool that enables data engineers to test data quality. Accessible on along with its documentation, you can download the CLI tool or import the Python library to prepare checks for data quality.

* Available for free
* Compatible with basic SodaCL checks and configurations
* Supports connections to 18+ data sources

[Soda Core on GitHub (v3)](https://github.com/sodadata/soda-core/tree/v3)     [Soda Core Docs (v3)](https://github.com/sodadata/soda-core/blob/v3/docs/overview-main.md)

<br>

**Soda Library**, an extension of Soda Core, enables users to connect to Soda Cloud and is compatible with complex SodaCL checks, and offers other features and functionality not available with the open-source tool.

[Install Soda Library](https://docs.soda.io/soda-documentation/soda-v3/quick-start-sip/install) for a free, 45-day trial, or [migrate from Soda Core](https://docs.soda.io/soda-documentation/soda-v3/quick-start-sip/upgrade#migrate-from-soda-core) to Soda Library without changing checks or data source connections.