Identity
Layer Review

Sybil-prevention alternatives, by evidence layer

Choose the assertion your campaign needs: live device relationships, wallet analysis or a defined uniqueness verification. Combine layers where the eligibility rule requires it.

Match the tool to the missing evidence

Live device and account evidence

ShieldLabs supplies ready-made account-abuse findings with live device/network intelligence. Verisoul adds account evaluation and linking. Fingerprint provides identity and signals for an engineering-owned application model.

All ten scores and current access

Ten Sybil attack prevention tools: editorial scores, detection approach, result and current starting access. Product facts checked October 21, 2026.
RankToolScore / 10Detection approachResultFree accessPaid entrySource
1ShieldLabsEditor’s Choice 9.4out of 10Live device/network intelligence and ready-made Multi-accountingRisk score, linked identities and named account-abuse findings5,000 free identifications99 US dollars/month for 25,000 identificationsVendor page
2Trusta Labs 8.8out of 10On-chain address behavior and Sybil-risk scoringAddress score, risk level and sub-scoresApplication-approved 1,000-call trial documentedRequest current commercial termsVendor page
3Human Passport (formerly Gitcoin Passport) 8.6out of 10Stamps, model-based scoring and batch Sybil analysisCredential scores, thresholds and wallet-cluster reportsFree basic API access advertised; feature-dependentData Services: 0.05 US dollars/addressVendor page
4Nomis 8.3out of 10On-chain reputation and behavioral segmentationWallet scores, metrics and cluster analyticsPublic scoring product; API approval requiredRequest business API and analytics termsVendor page
5Worldcoin / World ID 8.1out of 10Credential proofs with action-scoped duplicate preventionVerified proof results and nullifiersDeveloper integration and sandbox availableConfirm applicable deployment costsVendor page
6BrightID 7.9out of 10Social-graph verification linked to application contextsUniqueness verification under the chosen schemeOpen-source network; project sponsorship neededConfirm sponsorship capacity and operating costsVendor page
7Verisoul 7.7out of 10Passive device intelligence and account linkingAccount risk and identity relationshipsDemo-led access; confirm evaluation termsCurrent pricing route requests a demoVendor page
8Humanode 7.5out of 10Biometric uniqueness with network and community integrationsBioauth state or verified community rolePublic guides; confirm project evaluation termsConfirm network and integration-specific costsVendor page
9Civic 7.3out of 10Civic Pass uniqueness and liveness — discontinuedHistorical credential-based eligibilityCivic Pass discontinuedNot available for new Civic Pass deploymentsVendor page
10Fingerprint 7.1out of 10Persistent device identification and device-risk signalsVisitor identifier and plan-dependent signals1,000 API calls/month; separate 14-day trialPro Plus: 99 US dollars/month for 20,000 callsVendor page

Scores are editorial assessments under the 34-criterion rubric. Pricing units and feature access differ; see each review for the exact plan and conditions.

Historical option: Civic Pass

Civic Pass is discontinued. Its legacy score is preserved with a clear status in the comparison; current authentication products do not reinstate its retired uniqueness service. Use the historical review to audit migration needs.

Combine controls at the eligibility boundary

A wallet score does not observe the browser, a device link does not certify a person and a uniqueness credential does not by itself prevent direct duplicate redemption. Define the permitted participant and enforce the approved result through the trusted backend or contract.

Read the three-layer comparison and claim integration guide, then use the evaluation routes for a focused pilot.

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