# Introduction

Koi is one of the largest zkRollup DeFi Platforms built on [zkSync](https://zksync.io) Era. Invest & trade, earn yields, and participate in Bonds all on one decentralized, community driven platform. Leverage the security of Ethereum without high gas fees.<br>

Features include:

* AMM based DEX w/ Limit orders
  * Stable and Normal AMM curve pools
  * Variable LP fees: Stable (0.01%-2%), Normal (0.01%-10%)
  * Fixed and Dynamic Protocol fees
  * 0% LP minting fee
* 1-3s settlements
* 95%+ gas cost savings compared to L1 ETH
* [Yield Generation Platform ](/mute-switch/amplifier.md)
* [Bond Offerings](/mute-switch/bonds.md)
* [DAO](broken://pages/-MUByzMMEZcgPHIh9jWS)<br>


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