OP Mainnet

Top coin — the largest coin's share of this chain's stablecoin supply. HHI — Herfindahl-Hirschman Index, the sum of squared percentage shares on a 0–10,000 scale, the same definition published for the market-wide concentration series. Both are computed over every coin with supply on the chain, not only those listed below. A chain's concentration measure describes only its stablecoin mix. It does not indicate the security of the chain or the soundness of the issuers represented on it.

Coins with at least $1M of supply on this chain, ranked by that supply. 25 further coins hold smaller balances here and are counted in the concentration figures above but not listed.

Launched	2021
Tier	Layer 2 (Ethereum)
Consensus	Optimistic Rollup (OP Stack)
Bridged to	Ethereum
EVM-compatible	Yes
Website	optimism.io

Frequently asked questions

Is OP Mainnet EVM-compatible?

Yes, OP Mainnet is EVM-compatible, meaning Ethereum tools and wallets work natively.

What is OP Mainnet built on?

OP Mainnet is a Layer 2 built on Ethereum. It posts its data to Ethereum and inherits Ethereum’s settlement security, while offering lower fees and faster transactions.