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Arbitrum, created by [Offchain Labs](https://www.offchainlabs.com/careers?i=ourteam), uses optimistic rollup technology to significantly reduce the amount of on-chain activity while resolving a dispute interactively. The off-chain process is quickly narrowed down to a merit-based conclusion, allowing for trustless consensus, high throughput and low gas fees while benefiting from the proven security of Ethereum.

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Thanks to Layer 2 efficiency, developers can scale with ease

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Get high throughput and scalability

Dive deep on building with Infura + Arbitrum with comprehensive documentation

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Learn more about Infura + Arbitrum

Check out [Arbitrum Bug Bounties](https://immunefi.com/bounty/arbitrum/)

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Solve problems for Arbitrum projects, earn bounties

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Scale at a fraction of the cost of Ethereum transactions

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As an optimistic rollup, anyone can affirm correct Layer 2 results with security rooted in Ethereum.

Security

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Arbitrum supports all EVM languages, and natively supports all Ethereum tooling without any special adapters.

Compatibility

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High-throughput is made possible by moving dense computation and storage off the Ethereum main network.

Scalability

Arbitrum is a Layer 2 scaling solution and optimistic rollup. This ‘optimism’ means that only the minimum possible amount of transaction information is published to the Ethereum mainnet, increasing efficiency while maintaining security.

Build secure, scalable apps in minutes

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[Sign up](https://app.infura.io/register) for Infura or [log in](https://app.infura.io/login) to your account.

Join us

To get started all you have to do is add the new Arbitrum Network Add-on to your account. To do this, [login](https://app.infura.io/login) to your Infura account, go to your [Ethereum workspace/project list](https://infura.io/dashboard/ethereum) and click to upgrade your plan.

Get Started

To get test tokens for the Arbitrum testnet, you first need to use a [faucet to obtain Ethereum Goerli](https://moralis.io/arbitrum-goerli-faucet-get-arbitrum-testnet-eth-in-3-steps/) testnet ETH. Then you can [migrate those tokens to the Arbitrum Testnet using the Arbitrum bridge.](https://developer.offchainlabs.com/docs/public_testnet)

Test Tokens

Arbitrum rollup is a super-scalable, secure and low-cost L2 solution created by Offchain Labs with an endless palette of options and flexibility for developers.

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Low-cost, limitless scaling for Ethereum dapps

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[Read our launch announcement](https://www.infura.io/blog/post/arbitrum-supported-by-infura) for details on the rollout of Arbitrum on the Infura network.

Blog: Arbitrum supported by Infura

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[Look over these tutorials](https://docs.metamask.io/services/tutorials/layer-2-networks/send-a-transaction/) to get you started building on Arbitrum with Infura.

Infura-Arbitrum tutorials

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Check out the [thousands of projects](https://portal.arbitrum.io/?chains=arbitrum-one) launched using Arbitrum

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Here are some resources to help you along your way.