Fluent is a blended execution Layer 2 on Ethereum that runs EVM, Wasm, and (planned) SVM smart contracts inside a single execution environment called rWASM, allowing contracts written in Solidity, Rust, or other Wasm-compatible languages to call each other atomically in the same transaction.

rWASM (reduced WebAssembly) is a verification-friendly Wasm variant Fluent uses as its canonical bytecode. EVM bytecode and standard Wasm are compiled down to rWASM so the same prover and state model can handle both, enabling true interoperability rather than bridged messaging.

How is Fluent different from Arbitrum Stylus?

Arbitrum Stylus adds a Wasm runtime alongside the EVM on Arbitrum, with cross-VM calls mediated by host functions. Fluent builds a single unified VM from the ground up, so Solidity and Rust contracts share the same state, memory model, and gas accounting without a translation layer.

Fluent: Blended Execution rWASM L2 Guide 2026

Fluent is one of the most architecturally distinctive Layer 2s shipping in 2026. Instead of picking sides in the EVM-vs-Wasm debate, Fluent runs them inside the same virtual machine so Solidity and Rust contracts can call each other in a single atomic transaction. This guide breaks down how blended execution works, why rWASM matters, and where Fluent fits in the modular L2 landscape.

What is blended execution?

Most chains commit to one execution environment — the EVM, SVM, MoveVM, CosmWasm — and treat everything else as a foreign system reachable only through bridges or async messages. Blended execution means multiple bytecode formats share the same state, the same mempool, and the same transaction scope. In Fluent, a single transaction can deploy an ERC-20 written in Solidity, call a high-performance matching engine written in Rust, and settle everything atomically. If any step reverts, the whole bundle reverts.

rWASM: the unifying bytecode

Fluent's canonical bytecode is rWASM, a reduced, determinism-friendly dialect of WebAssembly designed to be cheap to prove inside a zkVM. Both Solidity bytecode and standard Wasm compile down to rWASM before execution. This means the prover only has to reason about one instruction set, and contracts from different language ecosystems end up sharing the same gas model, memory layout, and storage trie.

Who benefits most?

Teams that want EVM liquidity and tooling but need the raw performance of Rust — orderbook DEXs, ZK circuit verifiers, on-chain ML inference, high-frequency oracles — are the natural early adopters. Historically they had to choose between writing everything in Solidity (painful) or deploying on a non-EVM chain and losing composability with stablecoins and blue-chip DeFi. Fluent lets them keep the liquidity and move the hot path to Rust.

How Fluent compares

Against Arbitrum Stylus, Fluent is more ambitious: Stylus bolts a Wasm runtime onto the existing EVM with cross-VM calls as host functions, while Fluent collapses both into a single VM. Against monolithic alt-VMs like Aptos or Solana, Fluent trades raw throughput for Ethereum settlement and EVM compatibility. And unlike parallel EVMs such as Monad or MegaETH, Fluent's scaling story is about language choice rather than parallelism per se.

Risks and open questions

Blended execution is unproven at scale. Gas metering for cross-language calls, developer debugging across two toolchains, and the maturity of rWASM proving are all areas to watch. Fluent is still early — mainnet launch, sequencer decentralization roadmap, and the shape of the token (if any) will determine whether the architecture translates into real usage or stays a curiosity.

Bottom line

Fluent is a bet that the next phase of smart contract development will be polyglot. If that bet is right, blended execution removes the single biggest friction point in cross-ecosystem composability. For builders watching the L2 landscape in 2026, it's worth tracking alongside the better-known parallel EVM and ZK rollup contenders.

Educational disclaimer: This guide is for informational purposes only and does not constitute financial advice. Crypto involves significant risk — do your own research before making any decisions. Learn more about our team.