Optimism Network Ecosystem Overview Highlights Top OP Stack Blockchain Projects

TL;DR Optimism reported that 54 blockchains use OP Stack and that these networks processed 66.8% of Layer 2 and Layer 3 transactions in an average month of 2026. The ecosystem averaged 908 million monthly transactions and recorded $35 trillion in gross stablecoin transfers between January and September. Projects using its technology include World, Unichain, Ink, and Soneium, while OP Mainnet hosts applications such as Morpho, Velodrome, and ether.fi Cash. Optimism published a report on the growth of its ecosystem and the leading applications and blockchains using OP Stack , its infrastructure for building Ethereum-compatible networks. According to official statistics, 54 blockchains operate on mainnet using OP Stack . These networks processed an average of 66.8% of Layer 2 and Layer 3 transactions between January and September 2026.

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