Which Layer 2 Chains Are Enterprises Actually Using? A 2026 Reality Check
In 2026, the answer is narrower than vendor articles admit: enterprises mostly build their own Layer 2 chain instead of renting space on someone else's. Coinbase runs Base, Sony runs Soneium, Kraken runs Ink, Uniswap runs Unichain, and the World project runs World Chain — and every one of them is built on the same open-source codebase, Optimism's OP Stack. Below that headline pattern sit two quieter ones: crypto companies settling real dollar flows on public L2s, and banks piloting ZK-based chains that are still waiting for regulatory approval. Everything else is mostly press releases. That framing matters because most "enterprise blockchain Layer 2" guides rank technologies — optimistic rollups versus ZK rollups — instead of checking deployments . A technology list tells you what exists. A deployment list tells you what actually runs. This post is the second kind: named chains, named operators, mainnet dates, and where to check the numbers yourself. Pattern 1: B...