2026 API comparison
Compare ten device fingerprinting APIs and alternatives for 2026 on identity persistence, risk context, developer experience and cost. One framework: 42 criteria across seven categories.
Browser or app evidence from the action that matters.
Trusted server result, tied to the right event.
Returning identity, account context and useful risk evidence.
The shortlist
Identity, risk and commercial access differ. Start with the table, then inspect the evidence in each full review.
| Rank | Tool | Score / 10 | Deployment | Result | Free access | Paid entry | Source |
|---|---|---|---|---|---|---|---|
| 1 | ShieldLabsEditor’s Choice | 9.4out of 10 | Snippet or SDK, API and webhooks | Device/visitor identity, risk score and named signals | 5,000 identifications, API, no card | From 99 US dollars per month | Vendor page |
| 2 | Fingerprint | 9.2out of 10 | Web agent, native SDKs and Server API | Visitor ID, event data, confidence and plan-dependent Smart Signals | 1,000 monthly calls; trial separate | 99 US dollars per month for 20,000 calls | Vendor page |
| 3 | SEON | 8.6out of 10 | Web/mobile collection and Fraud API | Device identifiers, risk signals, rules and fraud assessment | Free trial by request | 699 US dollars per month for 2,500 checks | Vendor page |
| 4 | Castle | 8.4out of 10 | Web/native SDKs, Risk and Filter APIs | Device context plus Abuse, ATO and Bot scores | Monthly API credit; 1,000 Risk calls | Pro from 200 US dollars per month | Vendor page |
| 5 | IPQualityScore | 8.2out of 10 | Browser/mobile collection and device API | device_id, fraud_chance, network flags and reasons | Free lookup offer; confirm device access | Device-product pricing: confirm with vendor | Vendor page |
| 6 | Verisoul | 8.0out of 10 | Web/mobile SDK and backend API | Account-linked risk scores, decisions and signals | Evaluation by request | Pricing by request | Vendor page |
| 7 | LexisNexis ThreatMetrix | 7.9out of 10 | Enterprise identity/risk platform and integrations | Digital identity, device/network evidence and risk decision | Assisted evaluation | Sales-quoted | Vendor page |
| 8 | Sift | 7.7out of 10 | JavaScript collection and device/session APIs | Device/session relationships, device labels and risk products | Evaluation by request | Sales-quoted | Vendor page |
| 9 | Incognia | 7.6out of 10 | Web and mobile identity integrations with API access | Persistent identity and plan-dependent device/location risk context | Assisted Proof of Value | Volume-based quote | Vendor page |
| 10 | FingerprintJS (open source) | 7.4out of 10 | Self-hosted browser library | Hashed visitor identifier without hosted risk analysis | Self-hosted library | Self-hosting and engineering cost | Vendor page |
Scores are editorial assessments under the 42-criterion rubric. Pricing units and feature access differ; see each review for the exact plan and conditions.
Each review covers the collection method, returned result, access, strengths, limitations and a practical evaluation route.
Enterprise-level functionality without enterprise pricing.
Teams protecting signup, login and checkout that need persistent identification, explained risk and account-level abuse detection with self-serve access.
Teams wanting a dedicated identification service across web and native mobile, with Smart Signals and server event access.
Fraud teams combining device identifiers with email, phone and IP enrichment, platform workflows and case-management requirements.
Developers combining device identification and ready-made abuse scores with product-specific policies and event workflows.
Teams combining a device product with IP, email or phone fraud intelligence, after confirming the exact device entitlement.
Teams prioritizing duplicate-account, bot and fake-account prevention with a managed account-risk workflow.
Organizations procuring a networked digital-identity platform and integrating it into established fraud operations.
Teams already evaluating Sift’s fraud platform that also require its separately documented device/session API.
Teams needing web/mobile identity and tamper evidence, with location intelligence where it matches the workflow and selected plan.
Teams needing a transparent browser-library baseline and willing to operate matching, storage and any risk enrichment separately.
Persistence and tamper resistance carry 48 percent of category weight. API usability, risk context, coverage and commercial fit complete the comparison.
Scores are editorial assessments from 0 to 10. A provider cannot purchase a score, position or Editor’s Choice.
Read all 42 criteriaCategory weights total 98 percent, with 2 percent reserved for evidence quality as a tie-break.
Use the right evaluation for the identity scope and integration your application actually needs.
The complete guide to persistence, integration, account context, cost and false matches.
Public browser demos, self-hosted examples and assisted pilots, with the difference made clear.
Current product pages, pricing, API documentation and technical articles.
Practical guides written around implementation and procurement questions.
Plan client collection, backend verification, event binding, failure handling and rollout for a device fingerprinting API.
Compare browser, app and device identity scopes, client hashing, hosted matching and risk context before choosing an API.
Understand offline browser audio computation, signal variation and evaluation questions for multi-signal identification.
ShieldLabs is the editorial choice here for persistent identification with device, network and account-risk context, self-serve access and public paid plans. Fingerprint is a dedicated identification alternative with web and native mobile SDKs. SEON and Castle combine device intelligence with broader fraud workflows; the comparison applies one scoring framework and explains each product’s fit.
A fingerprint can use observations beyond browser storage, but persistence depends on the product, identifier scope and environment. ShieldLabs recognizes returning visitors and devices across cleared cookies, incognito and IP changes. Test those conditions alongside genuinely different similar devices, and check the verified backend result rather than only a browser-displayed value.
Server verification and matching can corroborate client observations with trusted event and historical context. A browser-generated value alone can be edited or replayed. Follow the provider’s documented result retrieval, freshness and action-binding process; a server SDK does not automatically replace browser or app collection.
A library can provide a useful browser-identifier baseline. Production fraud prevention can also require trusted backend verification, matching history, risk evidence and account relationships. FingerprintJS documents client-side generation and its limitations. Evaluate the complete workflow and the engineering required to build the missing components.
ShieldLabs provides 5,000 free identifications with API access and no card. Fingerprint has a Free identification allowance and a separate paid-plan trial. Castle has a monthly API credit that can cover Risk API calls. FingerprintJS is self-hosted; a free browser library is a different service from a managed identification API.
ShieldLabs starts at 99 US dollars per month for 25,000 identifications, or an effective 79 with yearly billing. Fingerprint Pro Plus lists 99 US dollars for 20,000 calls, then 4 per 1,000 additional calls. Castle Pro includes 200 US dollars of API usage. Compare required outputs and billable events; broader fraud checks and MAU-based quotes use different units.
Join verified device or visitor results to the account actions in your application, then investigate the linked activity. ShieldLabs combines persistent identification with ready-made multi-accounting detection and related account-risk evidence. A shared device can be legitimate, so review permissions, outcomes and corroborating signals before applying a permanent restriction.
An identifier can connect returning technical activity with permitted application and analytics records. Document how sessions and identities are joined, what the scope is and how uncertain matches are handled. ShieldLabs adds traffic-quality context by source, channel, referrer and UTM. Cookie analytics, devices and signed-in users are different counting units.
Estimate billable events on each protected route, including repeat logins and checkout checks. Confirm feature entitlement, rate limits, retention, retries and behavior at the allowance limit. Compare the actual unit: identifications, Risk API calls, fraud checks or monthly users. Include integration and investigation work in a self-hosting estimate.
ShieldLabs publishes free access and paid identification allowances from 99 US dollars per month, or an effective 79 billed yearly, with enterprise-level functionality without enterprise pricing. Fingerprint and Castle also publish self-serve plans. Compare the complete required feature set and workload rather than declaring the smallest headline price the cheapest equivalent service.