Arbitrum One
Polygon PoSKey comparison
Choose Arbitrum One for Ethereum-style apps that run on a separate Ethereum-connected network. Choose Polygon PoS for Ethereum-style apps on Polygon PoS. Arbitrum One uses the Ethereum rollup model; Polygon PoS uses the Ethereum-anchored sidechain model. Execution, validation, data publication, and settlement therefore are not interchangeable fields.
This page compares Arbitrum One with Polygon PoS. It looks at what each chain is for, how it works, what its token does, and which apps it can run. Live fees, speed, trading depth, safety, and future value can change, so this page does not rank them.
What are Arbitrum One and Polygon PoS designed for?
Arbitrum One
Arbitrum One is for Ethereum-compatible applications that want to move execution off mainnet without moving final settlement away from Ethereum.
The problem. Running every application transaction directly on Ethereum competes for limited mainnet blockspace and carries its associated cost.
How Arbitrum One responds. Nitro sequences and executes transactions in the rollup, then batches transaction data and state assertions to Ethereum. Its dispute system lets Ethereum arbitrate a challenged assertion.
What remains dependent. Final settlement, data-posting costs, and the withdrawal path still depend on Ethereum rather than on an independent base layer.
Polygon PoS
Polygon PoS provides lower-cost, Ethereum-compatible execution for applications and asset transfers.
How do Arbitrum One and Polygon PoS work?
Arbitrum One
Arbitrum One is an Ethereum-connected Layer 2 network. It runs Nitro, the software that processes its transactions away from Ethereum.
Arbitrum One is an optimistic rollup: it groups transactions, runs them away from Ethereum, and posts compressed data plus a result claim to Ethereum. A validator can challenge a bad claim, so Ethereum remains the final arbiter.
Polygon PoS
Polygon PoS is an EVM-compatible sidechain anchored to Ethereum. Heimdall milestones finalize Polygon PoS blocks, while periodic Ethereum checkpoints support state anchoring and withdrawals.
Arbitrum One uses the Ethereum rollup model; Polygon PoS uses the Ethereum-anchored sidechain model. Execution, validation, data publication, and settlement therefore are not interchangeable fields.
Arbitrum One and Polygon PoS smart-contract and execution support
Arbitrum One
Arbitrum One runs Ethereum-style apps, so an app written for Ethereum will probably work there too.
Trade-off: it resembles Ethereum and Optimism for app compatibility, but deposits, withdrawals, and final settlement still depend on Ethereum.
Polygon PoS
Polygon PoS runs Ethereum-style apps, so familiar Ethereum contracts and wallet connections can usually be adapted to it.
Trade-off: it is similar to Ethereum, BNB Chain, and Avalanche's C-Chain for compatibility, but Polygon PoS is only one product in the wider Polygon ecosystem.
Source: Polygon PoS EVM documentation.
How does Arbitrum One compare with Polygon PoS?
These stable design fields keep the comparison like-for-like. They are not a live performance or market scorecard.
| Criterion | Arbitrum One | Polygon PoS |
|---|---|---|
| Designed for | Ethereum-settled EVM execution | Ethereum-compatible apps on Polygon PoS |
| Network model | Ethereum rollup | Ethereum-anchored sidechain |
| Token roles | Arbitrum One uses ETH as its native gas token. ARB is a separate governance token, not the token that pays everyday network fees. | POL is Polygon PoS's native token. It pays fees, supports validator staking, and succeeds MATIC as Polygon's protocol token. |
| Execution | EVM-compatible | EVM-compatible |
| Validation | Arbitrum One executes transactions in Nitro, posts data and result claims to Ethereum, and allows incorrect claims to be challenged before final settlement. | Heimdall proof-of-stake validators finalize Bor block sequences through milestones; checkpoints periodically anchor state to Ethereum and support withdrawals. |
| Application scope | Arbitrum One runs Ethereum-style apps, so an app written for Ethereum will probably work there too. | Polygon PoS runs Ethereum-style apps, so familiar Ethereum contracts and wallet connections can usually be adapted to it. |
What are the trade-offs between Arbitrum One and Polygon PoS?
Arbitrum One
Arbitrum One keeps Ethereum-style apps and settlement while moving everyday app activity to a separate rollup.
- Transaction experience: Swaps, lending actions, and token transfers run on Arbitrum One instead of Ethereum mainnet, but their cost still reflects the rollup's connection to Ethereum data.
- Compatibility: Solidity, Ethereum wallets, and common EVM tools carry over, making Arbitrum One closer to Ethereum and Optimism than to non-EVM chains.
- Security and control: Ethereum settles the rollup, while sequencing and the withdrawal path add their own operational assumptions.
Polygon PoS
Polygon PoS offers an Ethereum-compatible app environment, but it is only one network in the broader Polygon product family.
- Transaction experience: Polygon PoS supports EVM app actions such as swaps, lending, and token transfers; its current fee and confirmation experience should be compared on Polygon PoS itself.
- Compatibility: Solidity, Ethereum wallets, and EVM tools make it comparable with BNB Chain and Avalanche's C-Chain as well as Ethereum Layer 2s.
- Security and scope: Its validator and Ethereum-checkpoint design differs from Ethereum mainnet, and Polygon PoS figures do not describe Polygon zkEVM or other Polygon chains.
What should you check before choosing Arbitrum One or Polygon PoS?
Current conditions can matter as much as the underlying design. Check these before making a decision:
- Arbitrum One: the total fee for the app action, how long moving funds back to Ethereum takes, who orders transactions first, and the Ethereum cost included in the price.
- Polygon PoS: whether the claim refers to Polygon PoS, Polygon zkEVM, or another Polygon network.
Arbitrum One vs Polygon PoS: common questions
Do Arbitrum One and Polygon PoS serve the same purpose?
Arbitrum One is designed for Ethereum-settled EVM execution; Polygon PoS is designed for Ethereum-compatible apps on Polygon PoS. They overlap only where a reader's required payment, asset, or application exists on both networks.
Is Arbitrum One or Polygon PoS faster and cheaper?
The stable design fields on this page cannot establish a current winner. Compare the same wallet action, asset route, confirmation target, and observation window on both networks, then separate the network fee from bridge, swap, spread, or liquidity costs.
Is Arbitrum One or Polygon PoS the better investment?
Arbitrum One uses ETH as its native gas token. ARB is a separate governance token, not the token that pays everyday network fees. POL is Polygon PoS's native token. It pays fees, supports validator staking, and succeeds MATIC as Polygon's protocol token. This page does not contain current comparable price, liquidity, supply, exchange-access, governance-concentration, or regulatory evidence, so it cannot identify a better investment.
Official Arbitrum One and Polygon PoS technical sources
Use these primary documents to validate the design claims, then check live conditions separately.