10 Best Blockchain Attestation Platforms in 2026

In this article, I’ll cover the Best Blockchain Attestation Platforms for creating, issuing and verifying trusted digital claims. We will evaluate the platforms according to their attestation model, blockchain support, privacy features, verification methods, developer integrations, schemas, and real-world use cases. This comparison will help developers, Web3 projects, enterprises and users to understand which infrastructure is best suited for their specific requirements.

What Are Blockchain Attestation Platforms?

Blockchain attestation platforms are infrastructural systems that enable people, organizations and applications to create, issue, store and verify cryptographically signed claims on or adjacent to blockchain networks.

An attestation can attest to information including identity, credentials, reputation, eligibility, compliance, ownership, or participation without requiring users to rely only on centralized databases. These platforms often use schemas, electronic signatures, decentralized identifiers, intelligent contracts, or zero-knowledge proofs to establish trust.

Depending on the system, attestations can be recorded on-chain, stored off-chain or used in hybrid models, making them applicable to Web3 identity, governance, DeFi, credentials, Sybil resistance, RWA verification and AI-related use cases.

Key Points

Platform	Key Strength	Best For
Ethereum Attestation Service (EAS)	Open infrastructure for creating on-chain and off-chain attestations using structured data.	Identity, credentials, reputation, DAO governance
Sign Protocol	Omni-chain attestation protocol that enables users and organizations to attest and verify information across blockchains.	Cross-chain credentials and verification
Verax	Public on-chain attestation registry focused on discoverability, composability, and reputation data.	Reputation systems and ecosystem credentials
Human Passport	Issues verifiable credentials and proof-of-personhood attestations to combat Sybil attacks.	DAO voting, airdrops, community access
Galxe Passport	Credential-based identity platform that stores and verifies user achievements and participation records.	Loyalty programs and Web3 communities
Coinbase Verifications	Enables trusted identity and KYC-related attestations for wallet holders.	Identity verification and compliance
Polygon ID	Privacy-focused credential and attestation framework based on zero-knowledge proofs.	Decentralized identity and selective disclosure
Civic Pass	Delivers reusable identity attestations and access credentials for Web3 applications.	Compliance and gated access
SpruceID	Supports decentralized identity credentials and verifiable attestation workflows.	Enterprise identity and credential sharing
Cheqd	Provides decentralized credential issuance and verification infrastructure using DIDs and attestations.	SSI ecosystems and digital trust networks

1. Ethereum Attestation Service (EAS)

The Ethereum Attestation Service (EAS) is an open, permissionless attestation infrastructure that is proposed as a public-good protocol for building structured on-chain and off-chain attestations. The core of its model is the use of SchemaRegistry to define data structures and EAS contracts to create attestations.

EAS is deployed on EVM networks such as Ethereum, Optimism, Base, Arbitrum, and Polygon. It is integrated by developers via the EAS SDK, GraphQL APIs, indexers, explorers and intelligent contracts. Attestations may include issuers, recipients, expiration, revocation, references and encoded data. EAS also supports zero knowledge based verification and private data for privacy sensitive application.

Key Strength: Open, permissionless attestation infrastructure with flexible schemas and on-chain/off-chain support.

Best For: Web3 identity, reputation, credentials, governance and smart-contract verification

Ethereum Attestation Service (EAS) Benefits & Drawbacks

Benefits	Drawbacks
Open and permissionless attestation infrastructure	Public on-chain data can create privacy considerations
Supports custom schemas for different applications	Schema design can require technical expertise
Supports on-chain and off-chain attestations	Gas costs may apply to on-chain attestations
Integrates well with EVM smart contracts	Primarily suited to developers and Web3 applications
Useful for identity, reputation, credentials, and governance	Cross-chain deployments can require additional integration work

2. Signing algorithm

The Sign Protocol of EthSign is an omni-chain attestation infrastructure that allows applications to create, verify, and query structured claims across chains. Its core attestation model uses schemas, contexts and cryptographic signatures, with attestations that can be stored on-chain or off-chain. The protocol supports public, private and hybrid attestations.

It provides mechanisms for selective disclosure and privacy. Its protocol infrastructure, schemas, APIs and integration tooling allow developers to connect applications with verifiable evidence. Its architecture is geared toward identity, reputation, credentials, compliance and digital-trust applications where claims need to be machine-readable and auditable.

Core strength:** Omni-chain attestation infrastructure for structured, portable and privacy-preserving claims.

Best For: Cross-chain credentials, identity, reputation, compliance and verifiable data applications.

Sign Protocol Benefits & Drawbacks

Benefits	Drawbacks
Designed for multi-chain attestation use cases	Cross-chain implementations can add integration complexity
Supports structured schemas and attestations	Developers may need to understand its protocol architecture
Offers on-chain and off-chain approaches	Privacy configuration depends on the implementation
Suitable for portable credentials and claims	Ecosystem adoption varies across supported networks
Provides developer-oriented integration tools	More complex than simple credential-verification solutions

3. Verax

In 2023 we launched Verax , a shared on-chain attestation registry to simplify the discovery, consumption, and composition of public attestations for decentralized applications. Its core model is to have attestations in a shared registry rather than each application needing its own attestation infrastructure.

Verax supports EVM networks like Linea, Arbitrum, Base and BNB Chain Schemas define the structure of attestations, and portals manage the issuance logic for each domain Developers are able to integrate using its TypeScript SDK, smart contract, subgraphs, explorer and Graph-based tooling. Attestations can be of addresses, DIDs, IPFS hashes or other attestations, allowing for composable reputation and data relationships.

Key Strength: Shared attestation registry designed for discovering, consuming, and composing attestations across applications.

Best For: Composable reputation, reusable credentials, and applications that need shared attestation infrastructure.

Verax Benefits & Drawbacks

Benefits	Drawbacks
Shared registry makes attestations easier for applications to discover	Relatively specialized compared with general identity platforms
Supports composable attestations	Developers need to understand registry and portal concepts
Designed for reusable Web3 data	EVM-focused architecture can limit non-EVM use cases
Can connect different applications to common attestations	Ecosystem coverage may vary by deployment
Useful for reputation and credential infrastructure	Advanced integrations can require smart-contract knowledge

4. The human passport

Human Passport (Previously Gitcoin Passport) is a decentralized identity and Sybil-resistance tool that is centered around the proof of human-ness through multiple verification signals. Its Passport Stamps system aggregates credentials and verification signals into a composite Passport score, and developers are able to access these signals via **Stamps API v2, Passport Embed, and smart contracts.

It supports networks such as Optimism, Base, Arbitrum, Linea, Scroll, Shape, and zkSync for various on-chain functionality. Individual verifications can issue attestations on Optimism, Base, and Stellar. The architecture relies on cryptographic credentials and attestations, rather than exposing personal information directly. On-chain Passport data can be pulled from EAS and Verax registries.

Key Strength: Combines multiple verification signals and credentials for Sybil resistance and human verification.

Best For: DAO governance, airdrops, community access, identity verification, and anti-Sybil applications.

Human Passport Benefits & Drawbacks

Benefits	Drawbacks
Strong focus on Sybil resistance and human verification	Some verification methods may require users to provide additional evidence
Combines multiple identity and reputation signals	Passport scores can depend on available verification signals
Supports developer APIs and application integrations	Not primarily a general-purpose attestation registry
Useful for Web3 communities and governance	Some verification options can have geographic or eligibility limitations
Can help reduce duplicate or fraudulent participation	Users may have privacy concerns depending on the verification method

5. Galxe Passport

Galxe Passport is a Web3 identity and verification platform that enables users to reuse verified identity information across applications while minimizing exposure of sensitive data. Galxe Passport V2 launched in 2024 and the current V3 is focused on compliance-ready identity verification, privacy and Sybil resistance.

Its model is not a general-purpose attestation registry but a combination of identity credentials, encrypted data commitments, verification records, and zero-knowledge proofs.

Web3 developers are able to leverage Passport for onboarding, KYC, geo-fenced access, RWA products, and identity-based experiences. Supported compliance workflows include privacy features such as a Private Data Vault, ZK proofs, encrypted identity data, and facial re-verification.

Key Strength: Privacy-focused Web3 identity with reusable verification, encrypted identity data, and zero-knowledge capabilities.

Best For: KYC, compliant onboarding, Web3 identity, RWA applications, and Sybil-resistant user access.

Galxe Passport Benefits & Drawbacks

Benefits	Drawbacks
Designed for reusable Web3 identity verification	More focused on identity than general-purpose attestations
Includes privacy-oriented identity infrastructure	Compliance-oriented verification can introduce onboarding friction
Supports KYC and Sybil-resistance use cases	Some features depend on supported verification providers
Useful for Web3 applications and RWA projects	Users may need to complete identity checks for certain features
Can reduce repeated verification across applications	Availability of specific verification features can vary by region

6. Coinbase Verifications

Coinbase Verifications is a dedicated on-chain verification system built by Coinbase that uses the Ethereum Attestation Service to issue Coinbase-verified attestations. The current production implementation is on Base where EAS stores and manages the attestations and uses Coinbase specific schemas, attester contracts, resolvers, and an indexer to identify authorized verification records.

Eligible Coinbase customers can use the core model to verify the status of their account and optionally provide country data that can then be linked to a self-custodial EVM wallet. Developers are able to query the attestations, and verify their schema and issuer. It’s not a general credential issuance system, it’s meant for access control, verified-user experiences, and on-chain application benefits.

Key Strength: Coinbase-backed attestations that enable eligible users to prove certain Coinbase verification information on-chain.

Best For: Verified-user access, identity-based Web3 applications, and applications in the Base ecosystem.

Coinbase Verifications Benefits & Drawbacks

Benefits	Drawbacks
Provides Coinbase-backed verification information	Closely tied to Coinbase’s verification ecosystem
Uses on-chain attestations for verifiable claims	Limited compared with general-purpose attestation protocols
Useful for Base-based applications	Primarily designed around specific Coinbase verification claims
Can simplify verified-user access	Users need an eligible Coinbase account and verification status
Attestations can be checked programmatically	Not intended to replace a complete decentralized identity system

7. Polygon ID

Launched in 2022, Polygon ID is a decentralized identity platform based on zero-knowledge cryptography and self-sovereign identity. Its core model combines verifiable credentials, claims, decentralized identifiers and ZK proofs. It allows a user to prove specific attributes without disclosing unnecessary underlying information.

Polygon ID is designed for identity, KYC, KYB, access control and attestation use cases on the blockchain. Its developer ecosystem includes identity wallets, SDKs, platform services, Connect functionality and tools for creating and verifying zkProofs.

Zero-knowledge proofs make it possible for applications to verify claims instead of receiving all credential data, ensuring privacy is core to the architecture.

Key Strength: Zero-knowledge identity infrastructure allowing users to prove credentials without revealing personal information not needed for verification.

Best For: Private identity verification, KYC, credentials, access control and decentralized identity apps.

Polygon ID Benefits & Drawbacks

Benefits	Drawbacks
Strong zero-knowledge privacy architecture	ZK identity systems can be technically complex
Supports verifiable credentials and decentralized identity	Developers need familiarity with identity and proof concepts
Enables selective disclosure of information	Integration can require additional identity infrastructure
Useful for KYC and credential verification	Ecosystem compatibility depends on supported standards and tools
Can reduce unnecessary exposure of personal information	User experience may vary depending on the verification workflow

8. Civic Pass

Civic Pass launched in 2021 is Civic’s on-chain identity and access-control product bridging off-chain verifiable credentials and blockchain-based permissions. Its core model is off-chain identity verification with an on-chain pass, allowing intelligent contracts and decentralized applications to verify whether a wallet satisfies a set of pre-defined conditions without direct access to the underlying personal data.

Civic created the system for multi-chain Web3 apps, such as DeFi, DAOs, NFT projects, and access control services. Developers are able to embed Civic Pass into applications and intelligent contracts for eligibility checking. Its privacy architecture keeps sensitive verification data off-chain, with the relevant authorization state represented on-chain.

Key Strength: Connects off-chain identity verification with on-chain eligibility and access control, minimizing the exposure of personal information.

Best For: DeFi, DAOs, NFT use cases, gated communities and identity-based Web3 access.

Civic Pass Benefits & Drawbacks

Benefits	Drawbacks
Connects identity verification with on-chain access control	Some use cases require centralized verification components
Keeps sensitive identity information away from the blockchain	Users may face verification requirements before gaining access
Useful for Sybil resistance and gated applications	Pass requirements can vary between applications
Designed for DeFi, DAOs, NFTs, and Web3 services	Less suitable for general-purpose attestation creation
Can automate eligibility checks for supported applications	Dependence on Civic’s verification infrastructure can affect portability

9. SpruceID

Launched in 2020, SpruceID offers decentralized identity and digital credential infrastructure, rather than a traditional public attestation registry. At the core of the model are Decentralized Identifiers, Verifiable Credentials, Verifiable Presentations, and user-controlled data.

The platform’s open-source technology powers identity applications for government, enterprise, wallet and blockchain with implementations aligned to W3C Verifiable Credentials, OpenID4VC, ISO mobile-driver-license standards and related identity specifications.

Developers are able to connect using SpruceID libraries, SDKs and open source components including SSI and mobile credential tooling. Privacy is achieved through user-controlled credential storage, information minimization, cryptographic verification and selective disclosure, rather than storing raw identity data directly on-chain.

Key Strength: Open-source decentralized identity infrastructure built around verifiable credentials, DIDs, and user-controlled identity data.

Best For: Digital credentials, government identity, enterprise identity, wallets, and standards-based SSI applications.

SpruceID Benefits & Drawbacks

Benefits	Drawbacks
Strong focus on open standards and decentralized identity	Implementation can be more complex than basic credential systems
Supports DIDs and Verifiable Credentials	Requires identity infrastructure beyond a simple blockchain transaction
Open-source components support customization	Developers may need standards expertise
Suitable for enterprise and government credential systems	Not primarily an on-chain attestation registry
Emphasizes user-controlled identity data	Adoption and interoperability can depend on implementation choices

10. cheqd

cheqd is a purpose-built decentralized identity blockchain built on the Cosmos SDK, founded in 2021 with its network mainnet launching in November 2021. Its core model is on Decentralized Identifiers, Verifiable Credentials, schemas, status lists, trust registries and identity related resources instead of generic EVM attestations.

The cheqd Network is built on IBC interoperability and uses the native CHEQ token for network transactions and identity related payments. Developers are able to integrate via cheqd Studio REST APIs, SDKs, or direct ledger integration.

Privacy comes from verifiable credentials and user-controlled identity data, so that verification can happen without putting all personal information on-chain. It is mainly focused on reusable digital identity and trusted data infrastructure.

Key Strength: Dedicated decentralized identity network supporting verifiable credentials, DIDs, trust infrastructure, and identity data management.

Best For: Enterprise credentials, compliance, digital identity, professional credentials, and reusable verifiable data.

cheqd Benefits & Drawbacks

Benefits	Drawbacks
Purpose-built network for decentralized identity	Requires understanding of its dedicated network ecosystem
Supports DIDs and Verifiable Credentials	Less focused on general-purpose EVM attestations
Provides infrastructure for trust registries and credential status	Integration can be more involved than using a simple API
Useful for enterprise and compliance credentials	Network-specific architecture may not fit every Web3 application
Supports reusable digital identity infrastructure	Developers may need additional tooling for broader blockchain interoperability

Blockchain Attestation Platforms Comparison

Platform	Core Attestation Model	Network / Blockchain Support	Attestation Structure	Privacy	Developer Integration	Best For
Ethereum Attestation Service (EAS)	On-chain & off-chain	Ethereum, Base, Optimism, Arbitrum, Polygon and other EVM networks	Schema-based attestations	Off-chain data, private proofs, ZK options	SDK, APIs, smart contracts, indexers	Identity, reputation, credentials, governance
Sign Protocol	On-chain, off-chain & hybrid	Multi-chain / EVM-focused	Schema and structured claims	Selective disclosure and privacy-oriented options	APIs, SDKs, protocol tooling	Cross-chain credentials and verification
Verax	Shared on-chain registry	Multiple EVM networks	Schemas, portals and composable attestations	Depends on application design	SDK, smart contracts, subgraphs	Reputation and composable attestations
Human Passport	Credential and verification-based	Multiple Web3 networks	Stamps, credentials and verification signals	Privacy-focused verification options	API, Embed, smart-contract integrations	Sybil resistance and human verification
Galxe Passport	Identity and credential verification	Web3 / multichain ecosystem	Identity credentials and verification records	ZK, encrypted identity data, private vault	Passport integrations and APIs	KYC, identity and compliant onboarding
Coinbase Verifications	On-chain verification attestations	Primarily Base	EAS-based Coinbase verification claims	Limited claim-specific disclosure	Attestation queries and verification tooling	Verified-user access and Base applications
Polygon ID	Verifiable credentials + ZK proofs	Polygon ecosystem and broader integrations	DIDs, claims and credentials	Strong ZK and selective disclosure	SDKs, wallets, identity tools	Private identity and KYC
Civic Pass	Off-chain verification + on-chain pass	Multi-chain Web3 applications	Identity-based eligibility passes	Sensitive data kept off-chain	Application and smart-contract integrations	DeFi, DAOs, NFTs and access control
SpruceID	Verifiable credentials	Blockchain-agnostic / standards-based	DIDs, VCs and VPs	User-controlled and selective credential sharing	SDKs, libraries and APIs	Enterprise, government and digital credentials
cheqd	Decentralized identity & credentials	cheqd Network / Cosmos ecosystem	DIDs, VCs, schemas and trust registries	User-controlled credential data	cheqd Studio, APIs and SDKs	Enterprise identity and compliance

Quick Technical Comparison

Platform	Schema Support	Revocation / Status	ZK / Privacy Focus	Cross-Application Use	Main Differentiator
EAS	Strong	Yes	High	High	General-purpose attestation infrastructure
Sign Protocol	Strong	Yes	High	High	Omni-chain attestation approach
Verax	Strong	Yes	Medium	High	Shared, composable attestation registry
Human Passport	Credential-focused	Yes	High	High	Sybil resistance and proof of humanity
Galxe Passport	Identity-focused	Yes	High	High	Reusable Web3 identity
Coinbase Verifications	EAS schemas	Claim-specific	Limited	Medium	Coinbase-backed verification
Polygon ID	Credential schemas	Yes	Very High	High	ZK-based decentralized identity
Civic Pass	Pass/eligibility model	Yes	High	High	On-chain access control
SpruceID	W3C credential standards	Yes	High	High	Open standards and enterprise identity
cheqd	Credential/schema-based	Yes	High	High	Dedicated decentralized identity network

Conclusion

As Web3 expands, blockchain attestation platforms are becoming essential infrastructure for verifying identity, credentials, reputation, compliance and other digital claims.

These platforms differ in their attestation models, supported networks, privacy mechanisms, developer tools and verification methods. Some are focused on open on-chain attestations, others are in the decentralized identity, zero-knowledge proofs, Sybil resistance, or reusable credentials space.

When choosing a platform, consider network compatibility, schema flexibility, privacy architecture, integration options, revocation support, and use case. With the growth of Web3 applications, interoperable and privacy-preserving attestations can provide the basis for more verifiable and trusted digital interactions.

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