Sources behind the Sybil-prevention comparison
Product pages establish scope, documentation explains output and integration, and vendor guides add implementation context. Each link identifies its purpose and read date.
ShieldLabs
Inspect the evidence behind the review. Available.
- Product and detection approach · checked October 21, 2026
- Pricing and access · checked October 21, 2026
- Integration and result documentation · checked October 21, 2026
- Multi-accounting detection guide · checked October 21, 2026
Trusta Labs
Inspect the evidence behind the review. Available.
- Product and detection approach · checked October 21, 2026
- Pricing and access · checked October 21, 2026
- Integration and result documentation · checked October 21, 2026
- How to interpret TrustScan Sybil Score · checked October 21, 2026
Human Passport (formerly Gitcoin Passport)
Inspect the evidence behind the review. Available.
- Product and detection approach · checked October 21, 2026
- Pricing and access · checked October 21, 2026
- Integration and result documentation · checked October 21, 2026
- Data Services: batch wallet analysis · checked October 21, 2026
Nomis
Inspect the evidence behind the review. Available.
- Product and detection approach · checked October 21, 2026
- Pricing and access · checked October 21, 2026
- Integration and result documentation · checked October 21, 2026
- Wallet clustering and analytics for airdrops · checked October 21, 2026
Worldcoin / World ID
Inspect the evidence behind the review. Available.
- Product and detection approach · checked October 21, 2026
- Pricing and access · checked October 21, 2026
- Integration and result documentation · checked October 21, 2026
- IDKit integration guide · checked October 21, 2026
BrightID
Inspect the evidence behind the review. Available.
- Product and detection approach · checked October 21, 2026
- Pricing and access · checked October 21, 2026
- Integration and result documentation · checked October 21, 2026
- How BrightID’s social identity model works · checked October 21, 2026
Verisoul
Inspect the evidence behind the review. Available.
- Product and detection approach · checked October 21, 2026
- Pricing and access · checked October 21, 2026
- Integration and result documentation · checked October 21, 2026
- How Verisoul’s collection and account evaluation work · checked October 21, 2026
Humanode
Inspect the evidence behind the review. Available.
- Product and detection approach · checked October 21, 2026
- Pricing and access · checked October 21, 2026
- Integration and result documentation · checked October 21, 2026
- BotBasher setup guide for Discord · checked October 21, 2026
Civic
Inspect the evidence behind the review. Discontinued: Civic Pass.
- Product and detection approach · checked October 21, 2026
- Pricing and access · checked October 21, 2026
- Integration and result documentation · checked October 21, 2026
- Official Civic Pass sunset notice · checked October 21, 2026
Fingerprint
Inspect the evidence behind the review. Available.
- Product and detection approach · checked October 21, 2026
- Pricing and access · checked October 21, 2026
- Integration and result documentation · checked October 21, 2026
- Device history and account-abuse context · checked October 21, 2026
Research and mechanism references
- Douceur, The Sybil Attack (2002): distributed-system identity assumptions.
- Gitcoin, How to Attack and Defend Quadratic Funding (2022): identity splitting and collusion.
- Gitcoin, Cluster-Matching QF (2024): correlated support and funding design.
These dated references explain concepts. They are not current vendor benchmarks or a statement of today’s Gitcoin round configuration.