> For the complete documentation index, see [llms.txt](https://docs.bdb.ai/bdb-documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.bdb.ai/bdb-documentation/data-pipeline/components/readers.md).

# Readers

Readers are a group of components that can read data from different DB and cloud storages in both invocation types i.e. Real Time and Batch.

Following is the list of readers:

* S3 Reader
* HDFS Reader
* RDBMS Reader
* Elastic Search Reader
* SFTP Reader
* SFTP Stream Reader
* MongoDB Reader
* Azure Blob Reader
* Azure Metadata Reader