The rollup-centric roadmap succeeded in scaling Ethereum's throughput, but it created a massive UX problem: fragmented liquidity. Users and capital are now siloed across dozens of isolated Layer 2s.
To solve this, two dominant architectures have emerged in 2026: Optimism’s Superchain and Polygon’s AggLayer. If you are launching an appchain today, your choice of framework determines which of these interoperability networks you join.
Optimism’s Superchain: The Shared Standard
The Superchain is a network of L2s built strictly on the OP Stack (such as Base, OP Mainnet, and Zora).
How it works: The Superchain relies on shared sequencing and a unified bridging standard. Because every chain in the network runs the exact same open-source codebase, they can seamlessly upgrade together and route messages to each other without needing clunky, third-party wrapped-token bridges.
The Trade-off: To join the Superchain, you must use the OP Stack and abide by the governance of the Optimism Collective. It trades architectural flexibility for guaranteed ecosystem alignment.
Polygon’s AggLayer: Cryptographic Unification
The AggLayer (Aggregation Layer) takes a fundamentally different, zero-knowledge approach.
How it works: Instead of requiring everyone to use the same software stack, the AggLayer uses ZK-proofs to unify liquidity. Independent chains submit ZK-proofs of their state to the AggLayer, which batches them and settles them atomically on Ethereum. This allows a user to spend USDC on Chain A to buy an NFT on Chain B in a single, synchronous transaction.
The Trade-off: While the AggLayer is theoretically agnostic (accepting non-EVM and diverse chains), it leans heavily on the Polygon CDK for out-of-the-box integration. ZK-proof generation also introduces different computational overhead compared to optimistic fault proofs.
Which should you choose for your Appchain?
- If your priority is tapping into the massive, existing retail liquidity of Coinbase's ecosystem (Base) and you prefer Optimistic rollups, the OP Stack / Superchain is your home.
- If your priority is synchronous, cross-chain atomic transactions without worrying about 7-day withdrawal windows, Polygon CDK / AggLayer is the superior technological path.
Ready to launch? Choosing between the Superchain and the AggLayer dictates your RaaS provider options. Use our Interactive TCO Calculator to model the DA costs for these frameworks, or try our Architecture Wizard to find the perfect deployment partner.