How we compare proxy detection tools
The complete 39-criterion, seven-category framework separates network ownership, observed proxy use, live session evidence and account context.
Scope and exclusions
Included products provide maintained proxy/anonymizer intelligence through an API, local database, supported browser/session product or a broader risk platform. Plain geolocation, abandoned lists and header-only checks are excluded. Every review names the evidence layer and required integration.
Scoring rubric: 39 criteria in seven categories
Each criterion receives a 0–10 editorial assessment. The relative weights total 98. To compare their contribution, divide each weight by 98; for example, coverage contributes about 28.57 percent of the framework. The published score expresses the editorial assessment on a 0–10 scale.
| Category | Weight | Criteria | Questions applied |
|---|---|---|---|
| Taxonomy coverage and residential recall | 28 | 10 | datacenter and hosting classification; residential proxy recall (a proxy versus an ordinary home user); mobile and carrier proxy recall; static ISP proxies; SOCKS4 and SOCKS5, including compromised and IoT hosts; VPN, Tor, and public proxies; privacy relays such as iCloud Private Relay; typed sub-types in one verdict; IPv4 plus IPv6; and geographic reach, including heavy-SOCKS regions. |
| Detection method and corroboration | 18 | 6 | observed proxying over ASN, hostname, rDNS, or WHOIS inference; evidence from the connection itself rather than list membership; independence from HTTP headers; client-side checks of the WebRTC address, timezone, locale, and latency; TCP/IP-stack versus claimed OS; and device plus behavioral velocity across rotating exits. |
| False-positive discipline | 14 | 6 | iCloud Private Relay users; CGNAT and carrier NAT; corporate VPN, university, hotel, and public Wi-Fi egress; cloud-hosted users and monitoring services kept out of the proxy label; confidence-graded action with adjustable strictness; and separating anonymization from abuse. |
| Integration and developer experience | 8 | 4 | a production API with a documented JSON schema; latency and reliability at signup, login, and checkout; deployment shape (hosted API, local database, or JS agent) with client and server SDKs; and webhooks, bulk lookup, and burst rate limits. |
| Pricing and commercial access | 6 | 3 | self-serve public pricing; a free tier that returns the anonymizer verdict, and its quota shape; and unit economics plus commercial-use licensing. |
| Freshness and rotation resilience | 12 | 4 | live evidence over periodic list refreshes; last-seen and share-of-days-seen fields with decay once an address stops proxying; hours, not days, to catch a rotated exit; and proprietary observation over resold or community blocklists. |
| Verdict depth and explainability | 12 | 6 | a graded score or confidence instead of a boolean; named reasons; anonymizer and connection type; provider attribution plus ASN, ISP, and location; fraud, bot, and account-abuse context; and documented methodology with false-positive guidance. |
Editor’s Choice is a separate recommendation and adds no points. Scores are editorial product-fit assessments and are not customer-review averages.
Evidence rules
Product scope comes from current vendor pages and documentation. Pricing must match the named product, unit, period and entitlement. A checker or free geolocation response does not establish access to a paid security field. Vendor percentages without a comparable corpus are treated as claims, not cross-vendor measurements.
Evaluation protocol
- Define authorized direct, datacenter, residential, mobile, SOCKS5, VPN, Tor and privacy-relay cases.
- Include legitimate shared homes, carrier NAT, corporate egress and missing-evidence cases.
- Use the exact plan and integration being considered.
- Record returned fields, reasons, observation time, latency and billing units.
- Measure classification error and legitimate-user impact separately.
- Connect network evidence to the protected account action.
How to read a figure
| Marking | Meaning |
|---|---|
| Plain product fact | Published on a vendor product page or documentation. |
| Editorial score | Our 0–10 assessment under this rubric, never a user-review aggregate. |
| Undisclosed | The vendor does not publish the term; we do not invent it. |
| Checked date | The date the linked source was read, not a benchmark date. |
Editorial standards
Zero paid placements. Scores, ranking positions and Editor’s Choice are not sold. Factual corrections are assessed from current evidence separately from commercial inquiries. Vendor links do not by themselves establish an affiliate arrangement.
Pages are maintained by the Relay Signal Review editorial team and carry Gregory Hulse’s byline. We show the framework and sources so readers can inspect product facts directly.
Corrections
Pricing and product entitlements change. Send the page URL, exact passage, current primary source and date to editor@bestproxydetectiontools.com.