StarkNet is a ZK rollup on Ethereum developed by StarkWare, using STARK proofs — a different ZK cryptography system from the SNARKs used by zkSync and Polygon zkEVM. It's the most technically ambitious Ethereum L2, with a unique programming model and the strongest theoretical scalability ceiling.
STARK vs SNARK: The Cryptography Difference
Most ZK rollups use zk-SNARKs (zkSync Era, Polygon zkEVM). StarkNet uses zk-STARKs.
SNARKs: Smaller proof size (~200 bytes), faster verification, but require a trusted setup ceremony. If the ceremony is compromised, false proofs could be generated.
STARKs: Larger proofs (~45KB), slower verification, but require no trusted setup — they're transparent and post-quantum resistant. Theoretically more secure at the cost of proof size and verification gas.
For Ethereum L2s, the difference is mostly theoretical — both systems are considered secure. STARKs' post-quantum resistance becomes more relevant as quantum computing advances.
Cairo: StarkNet's Programming Language
Unlike zkSync Era (EVM compatible) or other EVM L2s, StarkNet uses Cairo — a purpose-built language for writing provable programs. Cairo compiles to STARK-verifiable execution traces.
This means: Solidity contracts cannot be deployed on StarkNet without rewriting in Cairo. This is StarkNet's biggest adoption challenge — it requires developers to learn an entirely new language.
Why Cairo exists: Writing circuits for arbitrary EVM opcodes is extremely complex. Cairo is designed from the ground up to be efficiently provable, enabling StarkNet to prove computation that would be impractical to prove with EVM compatibility.
Cairo 1.0 (Rust-like syntax) made the language significantly more developer-friendly than the original Cairo 0.
StarkNet DeFi Ecosystem
Despite the developer learning curve, StarkNet has attracted native applications:
Ekubo: StarkNet's dominant DEX, using concentrated liquidity similar to Uniswap v4. Native Cairo implementation with singleton architecture.
zkLend: Lending protocol on StarkNet. Supply and borrow Cairo-native tokens.
Nostra: Combined lending and stablecoin protocol. Issues UNO (overcollateralized stablecoin).
Avnu: DEX aggregator routing across all StarkNet liquidity sources.
Account Abstraction Native
StarkNet is the most advanced platform for account abstraction — every account on StarkNet is a smart contract by default (no EOAs). This enables:
- Social recovery: lose your key, recover via trusted contacts
- Session keys: authorize dApps for specific operations without signing every transaction
- Sponsored transactions: protocols pay gas on behalf of users (gasless UX)
- Multi-sigs natively: no separate contract needed
Ethereum's ERC-4337 attempts to add account abstraction on top. StarkNet has it natively from day one.
STRK Token
STRK is StarkNet's governance and staking token. It's used for:
- Paying transaction fees (alongside ETH)
- Staking to become a sequencer (StarkNet is decentralizing sequencing)
- Protocol governance votes
STRK was distributed via airdrop in 2024 to early StarkNet users, Ethereum contributors, and open-source developers. The airdrop had broad eligibility criteria covering the wider Ethereum ecosystem.
Who Should Use StarkNet
StarkNet is best for:
- Developers wanting to build Cairo-native applications with maximum ZK scalability
- Users of existing StarkNet-native DeFi (Ekubo, zkLend)
- Applications requiring native account abstraction
For most DeFi users, Arbitrum or Base offer more liquidity and a larger app ecosystem. StarkNet is a longer-term bet on the Cairo ecosystem maturing.