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Kleros Products

Kleros provides a suite of decentralized applications, all powered by Kleros Court for dispute resolution. This page gives an overview of each product and its current protocol version. Kleros Interface

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Protocol Version Guide

Kleros products run on two protocol versions. V1 is the production-proven protocol on Ethereum L1; V2 is the next-generation upgrade on Arbitrum L2. The table below shows where each product stands today.
Proof of Humanity note: PoH has its own “V2” product upgrade (cross-chain support, improved UX), but it still uses the Kleros V1 protocol for dispute resolution. Don’t confuse “PoH 2.0” (the product) with “Kleros V2” (the protocol).

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Production Products

Court

The heart of KlerosDecentralized dispute resolution using crowdsourced jurors, crypto-economic incentives, and game theory.
  • Stake PNK to become a juror
  • Vote on disputes and earn rewards
  • Create disputes via the integrated Resolver

Curate

Decentralized registriesCreate and maintain community-curated lists with economic incentives and dispute resolution.
  • Classic Curate (V1), Light Curate (V1), Stake Curate (V1 infra)
  • Token lists, address tags, contract registries
  • Query registry data via subgraph

Escrow

Secure transactionsHold funds in escrow with built-in dispute resolution if parties disagree.
  • Trustless payments between parties
  • Automatic release or dispute
  • Milestone-based payments

Governor

DAO governance executionExecute governance decisions with a dispute resolution backstop for contested actions.
  • Optimistic execution
  • Challenge period for proposals
  • Integration with Snapshot

Scout

Contract & token verificationCommunity-curated safety information for smart contracts, tokens, and dApps. Integrates with MetaMask Snaps.Scout is a frontend that reads from Curate registries.

Reality (Oracle)

Reality.eth + KlerosCrowdsourced oracle system where Kleros serves as the final arbitration layer for disputed answers.
  • Powers Zodiac Reality Module
  • Kleros as arbitration backstop

SafeSnap

Trustless DAO executionExecute Snapshot vote outcomes against a Gnosis Safe treasury, with Kleros Court as the final arbitrator.
  • Snapshot vote → Safe execution
  • Permissionless challenge with bonds
  • Kleros as arbitration backstop

Proof of Humanity

Sybil-resistant identity registryA registry of verified humans combining video verification, social vouching, and dispute resolution.Uses the Kleros V1 protocol for dispute resolution.

Foresight

Prediction-market decision makingPrediction market platform built on Seer, with Kleros Court as the backstop for contested outcomes.Experimental

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Curate Variants

Curate is a family of three variants:
  • Classic Curate (V1) - full Token-Curated Registry with complex schemas
  • Light Curate (V1) - simplified TCR for higher volume
  • Stake Curate (V1 infrastructure) - continuous verification with permanent deposits
See Curate for details.

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V1 Product Versions

The V1 versions of these products remain in production. Each product page above covers its V1 details first, then what changed in V2.

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Retired Products

These products are no longer actively maintained. They are listed under Retired Products in the sidebar.

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Next Steps

Build on Kleros

Integration guides for developers

Learn the concepts

Understand how Kleros works