Overview

Umbra is a stealth address privacy protocol for EVM networks. Umbra is one of the preeminent privacy tools available on Optimism since its launch in March 2022. In that time, is has processed over $200 Million in asset value. Nearly 14,000 addresses have registered to receive private payments, and more than 69,000 transactions have been occurred. As a tool for private payments, Umbra is especially useful on an L2 network like Optimism, where low fees make the payments use case more tenable than mainnet. Umbra also launched on Base in April 2024. ScopeLift, the creators of Umbra, have also contributed to several EIPs to help standardize stealth addresses for all EVM networks. It is our hope these standardization efforts will be the next step to making Stealth Address technology broadly accessible and useful to all in the ecosystem.