# Introduction to the Iglu schema registry
> Iglu is the schema registry that powers schema validation in Snowplow pipelines, with public schemas in Iglu Central and private schemas in Iglu Server.
> Source: https://docs.snowplow.io/docs/api-reference/iglu/
> Documentation index: https://docs.snowplow.io/llms.txt

- Cloud: available
- Private Managed Cloud: available
- Self-Hosted: available
- Add-on: not available

All Snowplow platforms include Iglu. It's managed under-the-hood for CDI customers.

Find out more about [Snowplow CDI](/docs/cdi/) and [product availability](/docs/get-started/feature-comparison/), or contact [Support](https://support.snowplow.io) to upgrade.

> **Info: CDI customers**
>
> If you're a Snowplow CDI customer, you don't need to manage Iglu directly — it's included in your pipeline. Use [Event Studio](/docs/event-studio/data-structures/) or the [Snowplow CLI](/docs/api-reference/snowplow-cli/) to manage your schemas. This page is for Self-Hosted customers.

Iglu is the schema registry that powers schema validation in your Snowplow pipeline. It stores all the [schemas](/docs/fundamentals/schemas/) associated with your events and entities, and serves them to pipeline components for validation.

## How Iglu fits together

- [Iglu Server](/docs/api-reference/iglu/iglu-repositories/iglu-server/) is a private schema registry you run yourself. It exposes a RESTful API for publishing, validating, and serving your custom schemas.
- [Iglu Central](/docs/api-reference/iglu/iglu-repositories/#iglu-central) is a public registry hosted by Snowplow at [iglucentral.com](https://iglucentral.com/). It contains the schemas for Snowplow's out-of-the-box events and entities.
- [Static repositories](/docs/api-reference/iglu/iglu-repositories/static-repo/) are an alternative to Iglu Server for read-only schema hosting from a static website (for example, on S3).
- The [Iglu Resolver](/docs/api-reference/iglu/iglu-resolver/) is embedded into Snowplow pipeline components (enrichers, loaders) and fetches schemas from one or more configured registries.
- [Igluctl](/docs/api-reference/iglu/igluctl/) is a command-line tool for validating, publishing, and managing schemas.