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

# Ecosystem

### Mute

Mute was the earlier zkSync DeFi brand. Core protocol work continues under Koi Finance.

### Koi Finance

Koi Finance is our zkSync DeFi platform — swap, liquidity pools, farming, bonds, and veDAO governance. This documentation site covers Koi’s protocol, contracts, and integrations.

* Site: <https://koi.finance>

### Senddy

Senddy is our private payments product for USDC on Base. Same team, different chain and use case. Users can shield balances, send privately with ZK, and withdraw or spend when needed. Gasless UX and SDKs support consumers, institutions, and AI agents.

* [Senddy](https://www.senddy.com)
* [Senddy docs](https://www.senddy.com/docs)
* [Senddy blog](https://www.senddy.com/blog)

### Who Founded Koi and Senddy?

Koi was founded by Matt Tawil, who served as CTO focused on smart contract design, onchain UX, and security. More at [matt100x.dev](https://www.matt100x.dev).