Update README.md

README.md

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 | [Polybase](https://polybase.xyz) | a public L2 blockchain with private transactions and MEV-resistance powered by zero-knowledge proofs | ([Docs](https://polybase.xyz/docs/introduction) | - | - | - |
 | [TrueZK](https://www.truezk.com) | Post-Quantum ZK Rollup as a service x private DIDs | ([Docs](https://docs.truezk.com)) | - | - | - |
 | [Alpine](https://alpinecoin.io) |  a comprehensive blockchain ecosystem that combine cutting-edge technology with privacy | ([GitHub](https://github.com/AlpineERC)) | - | - | - |
+| [EtherChat](https://etherchat.app) |  First Layer-2 For Decentralized Chat | ([GitHub](https://github.com/EtherChatApp)) | - | - | - |
 
 ## Hardware
 ![alt text](https://github.com/Msiusko/web3privacy/blob/main/static-assets/Hardware.png?raw=true)