Optimism has raised a total of $178.5 million across three funding rounds, including a $3.5M Seed Round (Jan 2020), $25M Series A (Feb 2021) led by Andreessen Horowitz, and a $150M Series B (Mar 2022) co-led by Andreessen Horowitz and Paradigm, valuing the company at $1.65 billion. Founded in 2019, Optimism is an Ethereum-based Layer 2 scaling platform that enables fast, low-cost transactions through optimistic rollups. Headquartered in New York City, it aims to expand its Superchain ecosystem and further reduce gas fees through ongoing Ethereum upgrades.