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

# Substrate

> Substrate is a Rust framework for composing consensus, storage, and runtime logic into app chains.

# Substrate

Substrate is a Rust framework for composing consensus, storage, and runtime logic into app chains.

**A modular framework for building custom blockchains.**

Substrate is a Rust framework for composing consensus, storage, and runtime logic into app chains.

## Resource details

* **Organization:** Parity
* **Category:** Developer Documentation
* **Difficulty:** advanced
* **Official:** Yes
* **Editorial label:** Solid Reference

## Official resource

[Visit Substrate](https://docs.substrate.io)

## Related knowledge

* [Cosmos](/generated/v2/resources/cosmos) — resource
* [Cosmos](/generated/v2/resources/cosmos) — related-resource
* [Polkadot](/generated/v2/resources/polkadot) — resource
* [Polkadot](/generated/v2/resources/polkadot) — related-resource

***

**Canonical knowledge ID:** `resource:substrate`