Best proxy detection tools 2026.
Evidence before action.

ShieldLabs is Editor’s Choice for teams that need current device/network intelligence, risk scoring and account-level abuse context with self-serve access. IPQualityScore is a strong IP-risk API; Fingerprint adds device identity; IPinfo and Spur specialize in observed network intelligence. Choose the required evidence and product shape before relying on rank alone.

Proxy detection combines information about the observed IP with provider observations, connection evidence and, where supported, live browser/device signals. The application should then connect that result to the relevant visitor, user, device, IP and protected account action.

Some products publish dedicated residential/mobile fields or observed-exit data; live products can add device and connection corroboration. Verify the exact field, plan, observation window and unknown-state behavior on controlled traffic.

Sometimes a supported live session can expose additional network context, but no product can guarantee hidden-IP recovery for every browser and proxy. Treat the observed exit, device continuity and account behavior as useful evidence.

A detector may correctly identify these network conditions. A good implementation keeps the label separate from the abuse decision, tests known legitimate cases and uses a response proportional to the protected action and corroborating evidence.

ShieldLabs includes 5,000 free identifications with device/network and account context. For IP-only lookups, proxycheck.io includes 1,000 daily queries and ipregistry starts with 20,000 credits. Fingerprint includes 1,000 monthly identification calls and a Pro Plus trial. Confirm whether the route covers a live visit or an IP address before comparing quotas.

ShieldLabs starts at 99 US dollars/month for 25,000 identifications. proxycheck.io Starter costs 4.99 US dollars/month for 10,000 daily IP queries. ipregistry packs start at 10 US dollars for 15,000 credits. ipgeolocation.io Starter costs 19 US dollars/month, with security and live checks consuming different numbers of credits. Compare the required evidence and billing unit.

A static list can enrich logs and catch previously observed exits, but it cannot reliably describe a new rotating exit or the risk of the current account action. Add recency, live session evidence or identity/account context according to the decision.

Yes, when the method does not depend only on HTTP forwarding headers. SOCKS5 does not need to inject those headers, so evaluate IP intelligence, connection evidence and live signals on authorized SOCKS5 sessions.

They observe different networks, refresh at different times, define labels differently and expose different product tiers. Compare field definitions, observation windows and the raw evidence behind the verdict before treating one answer as ground truth.

Start with the product whose free or low-cost access includes the evidence you need. ShieldLabs offers 5,000 free identifications with device/network and account context. For IP-only lookup, proxycheck.io has a low published entry price. Test both legitimate lookalikes and controlled proxy sessions.

Use one product when it returns the evidence required for the decision. Add another layer only when it contributes a distinct input, such as local IP intelligence plus live visitor and account context. Avoid stacking duplicate binary labels without reconciling definitions and observation time.

Freshness must match how quickly the proxy pool changes and the action being protected. Inspect the observation timestamp, update cadence and unknown-state behavior. For rotating exits, current session evidence and identity continuity can matter more than an old address label.

Store the returned type, reason, confidence, observation time and account action. Use proportional responses and give reviewers the evidence behind the outcome. A bare binary proxy flag is difficult to explain and more likely to create avoidable support work.

A previously unseen rotating exit may be absent from every list. Connect the current visit to device, visitor and account history, inspect repeated business actions, and use live network evidence where supported instead of waiting for an address to enter a shared blocklist.

Use independently known direct and authorized proxy cases, include legitimate shared networks, record exact fields and observation time, and report false positives, false negatives, missing results, latency and user impact with denominators.