> For the complete documentation index, see [llms.txt](https://docs.zkbob.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.zkbob.com/zkbob-overview/readme.md).

# zkBob

<figure><img src="/files/H2wS6FbqHHmy0btd9r8g" alt=""><figcaption></figcaption></figure>

{% hint style="success" %}
zkBob is an open-source, decentralized application available for the community.[ Learn More.](/zkbob-overview/basic-concepts/open-source-and-decentralized.md)&#x20;
{% endhint %}

## Get Started

> :man: [zkBob App](https://app.zkbob.com/)\
> :man\_swimming: [Info and Instructions](/zkbob-app/zkbob-app.md)\
> :person\_running:[Technical Details & Contracts](/implementation/high-level-overview.md)\
> 🔐 [Security Audit](/resources/security-audit.md)<br>

## About

[zkBob](https://app.zkbob.com) is a stablecoin-based privacy application deployed on Polygon and Optimism and designed for everyday users and [common use cases](/zkbob-overview/basic-concepts/use-cases.md). zkBob uses [zkSNARKS](/implementation/zksnarks-and-circuits.md) to anonymize senders, receivers, and amounts when transferring stable funds. [Compliance features](/zkbob-overview/compliance-and-security.md) deter bad actors and illicit usage, giving privacy and safety back to ordinary blockchain users.

zkBob now supports multiple tokens, **including USDC on Polygon, USDC and ETH on Optimism and USDT on Tron**. Once tokens are deposited into the zkBob pool, participants can transfer any amount\* amongst themselves in a private, secure manner without needing to connect MetaMask, WalletConnect or any web3 wallet.

<figure><img src="/files/5gnxyIuyM1vebLbvccvY" alt=""><figcaption></figcaption></figure>

When a transfer is initiated, the amount and recipient is never disclosed or published. Transactions are routed through a [relayer](/implementation/relayer-node.md), abstracting gas fees while providing an efficient transfer environment.&#x20;

Deposits, transfers and withdrawals are all processed on the chain where the app is deployed, with standardized gas fees ($0.10 per tx on MATIC, variable on Optimism) paid using the supported token.

* The [zkBob application](https://app.zkbob.com/) is multichain (**Polygon, Optimism, Tron**) to utilize existing infrastructure (Uniswap v3, Aave, and native USDC), prioritize scalability, and support their commitment to zk-based solutions.

*\*zkBob introduces* [*deposit and withdrawal limits*](/zkbob-overview/deposit-and-withdrawal-limits.md) *and other* [*compliance features*](/zkbob-overview/compliance-and-security.md) *to keep the application and its users safe. Transfers are limited by these pool constraints.*&#x20;

## Project Landing Pages

* zkBob application: <https://zkbob.com/>
* Private payment links: <https://zkbob.com/payment-link>
*

## Newsletter & Blog

[Sign up for the zkBob Blog](https://blog.zkbob.com/) to receive the latest updates about zkBob.