# Technical breakdown

[DAO DAO's smart contracts](https://github.com/DA0-DA0/dao-contracts) are built with CosmWasm and thus run on blockchains that support CosmWasm:

* [Cosmos Hub](https://hub.cosmos.network)
* [Juno](https://junonetwork.io)
* [Osmosis](https://osmosis.zone)
* [Neutron](https://www.neutron.org)
* [Stargaze](https://stargaze.zone)
* [Migaloo](https://twitter.com/migaloo_zone)
* Terra
* Terra Classic
* [Oraichain](https://orai.io)
* [Kujira](https://kujira.network)
* [Rujira/THORChain](https://rujira.network)
* [BitSong](https://bitsong.io)
* [OmniFlix](https://omniflix.network)

## What is CosmWasm?

CosmWasm is a [WebAssembly](https://webassembly.org) virtual machine that runs in a [Cosmos SDK](https://docs.cosmos.network) module.

In practice, CosmWasm smart contracts (like DAO DAO's) are written in Rust.

## What is Rust?

[Rust](https://www.rust-lang.org) is a performant, memory-safe, and thread-safe programming language with a rich type system.

Writing smart contracts in Rust allows us to perform better security analysis on our contracts, which in turn protects your DAOs from common attacks.

## What about the UI?

[DAO DAO's UI](https://github.com/DA0-DA0/dao-dao-ui) is built with [Next.js](https://nextjs.org) in [TypeScript](https://www.typescriptlang.org).

As the UI is the primary entrypoint for users interacting with DAO DAO DAOs, its security is as important as the smart contracts themselves. TypeScript increases the likelihood that bugs are detected earlier, during development.