# L2BEAT data availability layers > Every data availability layer tracked by L2BEAT with its type and risks: public layers one entry per bridge to Ethereum plus one for use without a bridge, and custom solutions built for a single project. ## Public layers (/data-availability/projects/{layer}/{bridge}) Public DA layers are data availability solutions designed for broad, general use across multiple scaling projects. - [Ethereum via Enshrined Bridge](https://l2beat.com/data-availability/projects/ethereum/ethereum): Public Blockchain, DA layer: Self-verify, DA bridge: Enshrined. Ethereum is a Proof of Stake (PoS) network that enables the creation and execution of smart contracts and decentralized applications (dApps) using its native cryptocurrency, Ether (ETH). - [Avail via Vector](https://l2beat.com/data-availability/projects/avail/vector): Public Blockchain, economic security: Staked assets, fraud detection: DAS, committee security: Validator set, upgradeability: No delay, relayer failure: No mechanism. Avail is a public blockchain and data availability network combining erasure coding, KZG polynomial commitments, and data availability sampling. - [Celestia via Blobstream](https://l2beat.com/data-availability/projects/celestia/blobstream): Public Blockchain, economic security: Staked assets, fraud detection: DAS, committee security: Validator set, upgradeability: No delay, relayer failure: No mechanism. Celestia is a modular data availability network that allows L2s to post arbitrary data as blobs. - [Celestia without a bridge](https://l2beat.com/data-availability/projects/celestia/no-bridge): Public Blockchain, economic security: Staked assets, fraud detection: DAS. Celestia is a modular data availability network that allows L2s to post arbitrary data as blobs. - [Espresso DA via HotShot Light Client](https://l2beat.com/data-availability/projects/espresso-da/espresso-da): Public Blockchain, economic security: No slashing, fraud detection: None, committee security: Validator set, upgradeability: No delay, relayer failure: No mechanism. Espresso DA is a three-layer data availability (DA) solution based on the HotShot consensus. - [Espresso DA via TEE Bridge](https://l2beat.com/data-availability/projects/espresso-da/tee-bridge): Public Blockchain, economic security: No slashing, fraud detection: None, committee security: TEE-based, upgradeability: No delay, relayer failure: No mechanism. Espresso DA is a three-layer data availability (DA) solution based on the HotShot consensus. - [Espresso DA without a bridge](https://l2beat.com/data-availability/projects/espresso-da/no-bridge): Public Blockchain, economic security: No slashing, fraud detection: None. Espresso DA is a three-layer data availability (DA) solution based on the HotShot consensus. - [EigenDA via DACert Verifier (EigenDA V2)](https://l2beat.com/data-availability/projects/eigenda/eigenda): DA Service, economic security: No slashing, fraud detection: None, committee security: Permissioned, upgradeability: No delay, relayer failure: Self propose. EigenDA is a data availability solution built on EigenLayer. - [EigenDA without a bridge](https://l2beat.com/data-availability/projects/eigenda/no-bridge): DA Service, economic security: No slashing, fraud detection: None. EigenDA is a data availability solution built on EigenLayer. ## Custom solutions (/layer2s/projects/{slug}) Custom DA layers are data availability solutions tightly integrated with a single scaling project, so each links to the page of the project it serves. - [AlienX DAC](https://l2beat.com/layer2s/projects/alienx): Data Availability Committee, used by AlienX, fallback: Ethereum, economic security: None, fraud detection: None, committee security: 1/1, upgradeability: No delay, relayer failure: No mechanism. Set of parties responsible for signing and attesting to the availability of data. - [Appchain DAC](https://l2beat.com/layer2s/projects/appchain): Data Availability Committee, used by Appchain, fallback: Ethereum, economic security: None, fraud detection: None, committee security: 1/1, upgradeability: No delay, relayer failure: No mechanism. Set of parties responsible for signing and attesting to the availability of data. - [CyberDA](https://l2beat.com/layer2s/projects/cyber): DA Challenges, used by Cyber, fallback: Ethereum, economic security: DA Challenges, fraud detection: None, committee security: None, upgradeability: No delay, relayer failure: No mechanism. CyberDA is a data availability solution using data availability challenges (DA Challenges). - [FraxtalDA](https://l2beat.com/layer2s/projects/fraxtal): Custom, used by Fraxtal, economic security: None, fraud detection: None. FraxtalDA is a custom data availability solution built by the Fraxtal team. - [Altlayer DA](https://l2beat.com/layer2s/projects/funki): DA Challenges, used by Funki, fallback: Ethereum, economic security: DA Challenges, fraud detection: None, committee security: None, upgradeability: No delay, relayer failure: No mechanism. Altlayer DA is a data availability solution using data availability challenges (DA Challenges). - [Lasernet DAC](https://l2beat.com/layer2s/projects/lasernet): Data Availability Committee, used by Lasernet, fallback: Ethereum, economic security: None, fraud detection: None, committee security: 1/1, upgradeability: No delay, relayer failure: No mechanism. Set of parties responsible for signing and attesting to the availability of data. - [Pepe Unchained DAC](https://l2beat.com/layer2s/projects/pepe-unchained): Data Availability Committee, used by Pepe Unchained, fallback: Ethereum, economic security: None, fraud detection: None, committee security: 1/1, upgradeability: No delay, relayer failure: No mechanism. Set of parties responsible for signing and attesting to the availability of data. - [Reya DAC](https://l2beat.com/layer2s/projects/reya): Data Availability Committee, used by Reya, fallback: Ethereum, economic security: None, fraud detection: None, committee security: 1/1, upgradeability: No delay, relayer failure: No mechanism. Set of parties responsible for signing and attesting to the availability of data. - [Wirex Pay Chain DAC](https://l2beat.com/layer2s/projects/wirex): Data Availability Committee, used by Wirex Pay Chain, economic security: None, fraud detection: None, committee security: 1/2, upgradeability: No delay, relayer failure: No mechanism. Set of parties responsible for signing and attesting to the availability of data. - [ZKFair DAC](https://l2beat.com/layer2s/projects/zkfair): Data Availability Committee, used by ZKFair, economic security: None, fraud detection: None, committee security: 3/5, upgradeability: No delay, relayer failure: No mechanism. Set of parties responsible for signing and attesting to the availability of data. - [ApeChain DAC](https://l2beat.com/layer2s/projects/apechain): Data Availability Committee, used by ApeChain, fallback: Ethereum, economic security: None, fraud detection: None, committee security: 5/7, upgradeability: No delay, relayer failure: No mechanism. Set of parties responsible for signing and attesting to the availability of data. - [Edge Chain DAC](https://l2beat.com/layer2s/projects/edgechain): Data Availability Committee, used by Edge Chain, fallback: Ethereum, economic security: None, fraud detection: None, committee security: 2/5, upgradeability: No delay, relayer failure: No mechanism. Set of parties responsible for signing and attesting to the availability of data. - [EDU Chain DAC](https://l2beat.com/layer2s/projects/edu-chain): Data Availability Committee, used by EDU Chain, fallback: Ethereum, economic security: None, fraud detection: None, committee security: 1/1, upgradeability: No delay, relayer failure: No mechanism. Set of parties responsible for signing and attesting to the availability of data. - [Ethereal DAC](https://l2beat.com/layer2s/projects/ethereal): Data Availability Committee, used by Ethereal, fallback: Ethereum, economic security: None, fraud detection: None, committee security: 1/1, upgradeability: No delay, relayer failure: No mechanism. Set of parties responsible for signing and attesting to the availability of data. - [Xai DAC](https://l2beat.com/layer2s/projects/xai): Data Availability Committee, used by Xai, fallback: Ethereum, economic security: Public committee, fraud detection: None, committee security: 3/5, upgradeability: No delay, relayer failure: No mechanism. Set of parties responsible for signing and attesting to the availability of data. - [PlayBlock DAC](https://l2beat.com/layer2s/projects/playblock): Data Availability Committee, used by PlayBlock, fallback: Ethereum, economic security: None, fraud detection: None, committee security: 1/1, upgradeability: No delay, relayer failure: No mechanism. Set of parties responsible for signing and attesting to the availability of data.