Soneium
Sony's Ethereum L2, built on the OP Stack for consumer applications in entertainment and finance.
Soneium is an Ethereum L2 built by Sony Block Solutions Labs (a JV between Sony Group and Startale) on the OP Stack, part of the Optimism Superchain. It aims at general-purpose but consumer-heavy use cases — entertainment, gaming, media, and consumer finance — leveraging Sony's brand distribution. Astar Network's zkEVM migrated to Soneium, giving it an existing developer community.
- OP Stack optimistic rollup on the Optimism Superchain; ETH as gas, ~2s block times, sub-cent fees.
- Backed by Sony Block Solutions Labs (Sony Group JV with Startale) and integrated with Sony's consumer distribution.
- Absorbed Astar zkEVM and its developer community during 2025 as part of the Superchain migration.
- L2BEAT rates the fault-proof system as having fewer than five external challengers as of mid-2026, so it does not yet meet Stage 2 decentralization.
- DeFi footprint is smaller than the top L2s; use cases skew toward gaming, NFTs, and consumer applications rather than large lending TVL.
Frequently asked questions
Is Soneium really operated by Sony?
Soneium is operated by Sony Block Solutions Labs, a Singapore-based joint venture between Sony Group and Startale. Sony is the corporate backer and provides distribution and consumer relationships, while Startale contributes the core protocol engineering.
How decentralized is Soneium?
Soneium runs the standard OP Stack fault-proof system but with a limited challenger set — L2BEAT flags fewer than five external actors submitting challenges as of mid-2026. Upgrades are governed by a Sony-linked security council and multisig. It is at the more permissioned end of the Superchain today.
Should I use Soneium for DeFi yield?
The chain has smaller lending and DEX depth than Base or Arbitrum, so yields tend to be quieter and driven by incentive campaigns rather than organic borrow demand. It's more interesting as a consumer chain than as a scale DeFi venue right now.