Arbitrum vs Polygon: Rollup Security vs Sidechain Fees
Arbitrum is an Ethereum Layer-2 optimistic rollup that posts fraud proofs and data directly to Ethereum, settling gas fees in ETH. Polygon PoS operates as an independent Proof of Stake sidechain that validates transactions locally and commits periodic Merkle checkpoints back to Ethereum mainnet, settling gas fees in POL.
The architectural split shapes cost, finality, and code execution. Polygon delivers lower transaction costs with an average transfer fee of $0.002 and reaches settlement finality in approximately 1.8 seconds. In contrast, Arbitrum processes blocks in roughly 0.25 seconds using a centralized sequencer, but complete L1 dispute settlement requires a seven-day window. On developer tooling, Polygon supports standard Solidity contracts, whereas Arbitrum Stylus lets teams write smart contracts in Rust, C, and C++ alongside EVM Solidity.
Quick verdict
The architectural trust model is the primary deciding factor. Arbitrum derives its base security from Ethereum Layer 1 through optimistic rollup fraud proofs and blob data availability, holding more than $12.3 billion in ecosystem value. Polygon PoS relies on its own set of validators staking POL on Ethereum, which submit periodic checkpoints rather than relying on direct Layer 1 dispute proofs.
Choose Arbitrum if you require Ethereum Layer 1 rollup security guarantees, want to pay network gas fees in ETH, or plan to deploy smart contracts written in Rust or C++ through the Stylus execution environment.
Choose Polygon if you need average transfer fees around $0.002, want sub-two-second settlement finality without waiting for multi-day dispute windows, or run payment rails using the Polygon Open money stack.
| Feature | ||
|---|---|---|
| Ratings | ||
| Our score | 4.2/5 | 4.1/5 |
| User rating | No reviews yet | No reviews yet |
| Performance | 4.5 | 4.5 |
| Fees | 4.5 | 4.5 |
| Ecosystem | 5.0 | 4.5 |
| Decentralization | 3.0 | 3.5 |
| Developer experience | 4.5 | 4.0 |
| Specs | ||
| Layer | Layer 2 | Sidechain |
| Consensus / design | Optimistic rollup | Proof of Stake |
| Native token | ARB | POL |
| EVM compatible | Yes | Yes |
| Smart contract languages | Solidity, Rust (Stylus) | Solidity |
| Block time | ~0.25 seconds | Not disclosed |
| Typical transaction fee | Not disclosed | $0.002 |
| Finality | ~7 days (dispute window) | ~1.8 seconds |
| Mainnet since | 2,021 | 2,020 |
| Throughput (TPS) | Not disclosed | 5,000 |
| Sequencer | Centralized | Not applicable |
| Data availability | Ethereum L1 calldata / EIP-4844 blobs | Not disclosed |
| Gas paid in | ETH | POL |
| Company | ||
| Founded | 2021 | 2020 |
| Headquarters | United States | Cayman Islands |
| Investors | Coinbase Ventures, IOSG Ventures, OKX Ventures, ParaFi Capital +1 | Peak XV Partners, Galaxy Digital, Republic Capital, SoftBank Vision Fund 2 +4 |
| Strengths and weaknesses | ||
| Pros |
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| Cons |
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| Best for | High-frequency DeFi traders, Rust and Solidity smart contract developers, Teams launching dedicated Orbit appchains | High-frequency stablecoin payment providers, Fintech developers seeking EVM compatibility, DeFi apps requiring sub-cent fees |
Highlighted cells show the stronger value in each row. Data comes from each provider's site and public sources; check details before you sign up.
FAQ
Is Polygon cheaper than Arbitrum?
Yes, Polygon is generally cheaper with average transaction fees of $0.002. Arbitrum gas costs track Ethereum Layer 1 data availability and blob market pricing, though both networks cost significantly less than Ethereum mainnet.
How do their settlement times differ?
Polygon PoS reaches settlement finality in about 1.8 seconds through its Proof of Stake validator consensus. Arbitrum delivers block times of roughly 0.25 seconds via its sequencer, but native rollup withdrawals to Ethereum require a seven-day fraud-proof dispute window.
What tokens are used for gas on each network?
Arbitrum uses ETH for all transaction fees on its Arbitrum One network. Polygon PoS requires the POL token to pay gas, and burns the base fee through an EIP-1559 implementation.
Which programming languages do Arbitrum and Polygon support?
Polygon supports Solidity and standard EVM programming tools. Arbitrum supports Solidity alongside Rust, C, and C++ contracts executed through Arbitrum Stylus.