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V1 Protocol Documentation

This section documents the Kleros V1 protocol and its products, along with retired applications. V1 is the production-proven protocol on Ethereum L1 and remains active for web3 integrations.
Each V1 product below has a V2 version available on Arbitrum.

V1 Products


Retired Products

These products are no longer actively maintained:

What V2 Changes

  • Deployed on Arbitrum instead of Ethereum L1
  • Modular dispute kit architecture
  • Cross-chain support via VEA bridge
  • Evidence and appeals handled by the Court rather than the arbitrable contract
  • Vote privacy through Shutter integration (in development)