Product review

ShieldLabs Sybil attack prevention review

ShieldLabs connects the visitor behind a browser-based claim with device, network and account context. It helps expose repeated participation across linked identities before distribution, while wallet history and proof-of-personhood remain complementary layers.

By Petra Novakova · Updated October 21, 2026

9.4 / 10

Editorial score

Editor’s Choice

Enterprise-level functionality without enterprise pricing.

Evidence layer: Device and account
Free access: 5,000 free identifications
Paid entry: 99 US dollars/month for 25,000 identifications

Visit ShieldLabs Compare all ten

Key facts

Method: Cross-checks 300+ device and network signals, including anonymity and automation context, with linked account activity. Source ↗
Identity continuity: Recognizes returning visitors across cookie clearing, incognito mode and IP changes, with VisitorID and DeviceID supporting account relationships. Source ↗
Result: Risk score from 0 to 100 and Trusted, Suspicious and Dangerous verdicts for visitors, users, devices and IP, with inspectable identity relationships. Source ↗
Account abuse: Ready-made Multi-accounting, Account sharing, Impossible travel and Account takeover detection; event confidence is Medium or High. Source ↗
Access: 5,000 free identifications. Paid plans: 99 / 399 / 999 US dollars per month; Starter includes 25,000 identifications. Annual billing starts at an effective 79 US dollars per month. Source ↗
Integration: Five-minute setup with supported client/server SDKs, API responses and webhooks. Associate application user or wallet identifiers in the protected flow. Source ↗

Strengths

Live cross-checking reduces dependence on stale IP blocklists and adds evidence beyond a wallet’s transaction history.
Ready-made account-abuse detection combines persistent identities with bot, VPN, proxy and anti-detect context.
Self-serve access and an included free allowance support a small team’s pre-launch evaluation.

Limitations

Collection must cover the supported enrollment or claim flow; an existing wallet list cannot recreate browser observations from past visits.
A shared device is evidence to investigate, not a certification that several wallets belong to one physical person.
On-chain funding graphs, personhood credentials and contract eligibility are separate parts of the application design.

Who it fits

Web enrollment, airdrop claims and points programs needing live device and account-abuse evidence alongside wallet checks.

Use the alternatives by evidence layer to compare a different assertion, participant journey or operating model.

What the score means

The 9.4 out of 10 score is an editorial assessment under the same 34-criterion, six-category framework. The rubric emphasizes live coordination prevention and practical application fit; it is not a separate ranking of pure wallet analytics or personhood assurance.

The award and score are distinct. Read all criteria and relative weights and verify the evidence layer required for your campaign.

How to evaluate it

Associate known test accounts and wallets with supported visits. Compare a controlled repeated-participation group with legitimate shared devices and fresh wallets; inspect Multi-accounting evidence before the actual claim decision.

Live signal demo and Start Free

Inspect your own permitted visit, then test a new campaign using the supported integration. No wallet signature is required to inspect the product page.

Open evaluation route

Sources and further reading

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

FAQ

Does ShieldLabs analyze wallet funding graphs?

Its Sybil solution adds live device, network and account evidence. Supply wallet/account association from the application and use an on-chain analysis product for funding and transaction graphs.

Can it work with Human Passport or World ID?

Yes, the layers can be combined in the application: verify the appropriate credential, inspect device/account risk and enforce the final eligibility decision at the trusted claim boundary.

Can I replay an old wallet list through the free allowance?

A wallet list can support on-chain analysis, but cannot recreate live browser observations. Use the 5,000 free identifications for supported new visits in an authorized evaluation.

Explore checkers, demos and evaluation routes →