Predax
IPQualityScore
ipinfo.io
MaxMind
ZeroBounce
Sift
Abstract APIs
Bounceless
LayerCall
IPQualityScore
ipinfo.io
MaxMind
ZeroBounce
Abstract APIs
Bounceless
DeBounce
Predax is a real-time IP intelligence platform that detects VPN, proxy, Tor, and datacenter traffic with risk scoring from 0-100. Every lookup returns a full threat profile โ classification flags, geolocation, ASN data, network info, and a transparent provenance breakdown showing exactly why an IP was flagged.
Built for developers and site owners who need control over their traffic. Integrate via REST API with a single header, or install our free WordPress and WooCommerce plugins for one-click protection with no code required.
What you get with every lookup: - VPN, proxy, Tor, and datacenter detection across multiple data sources - Risk score 0-100 with full scoring provenance - Geolocation (country, city, region) and ASN/network identification - Community Threat Network reputation โ crowd-sourced intelligence from all Predax users - Web Application Firewall detecting SQLi, XSS, path traversal, and scanner patterns
Why site owners choose Predax: - Bad traffic kills ad RPM. Predax lets you see and control exactly what's hitting your site - WordPress plugin installs in one click with a guided setup wizard and protection presets - WooCommerce plugin blocks fraudulent orders at checkout before they cost you money - Community-powered: every block reported by any user strengthens protection for everyone
Built for scale: - Sub-second API response times - Tor nodes refresh hourly, proxy lists every 15 minutes, VPN feeds daily - Bulk analysis: 100 IPs per sync request, unlimited async jobs - Free tier: 1,000 lookups/month, no credit card required. Paid plans from $9/month
GDPR compliant. DPA available. No contracts, no minimums.
LayerCall scores a whole signup in one API call.
Most fraud tools answer one question at a time: is this IP a VPN, is this email disposable, is this phone real. LayerCall returns all of them together โ IP, email, phone, domain and device โ plus the relationships between them, which is where most fake signups actually show up. A brand-new domain paired with a datacenter IP and a throwaway mailbox is obvious in combination and unremarkable one field at a time.
Every response carries a 0โ100 risk score, an allow / review / block verdict, and the individual signals behind it, so a decision can be explained rather than just made. Strictness is tunable per request without re-scoring, and when a data source is unavailable the response says so rather than quietly scoring lower.
It also authorizes AI agents. Web Bot Auth signature verification tells you which agent is calling and whether it can prove it, and a policy engine decides what it may do โ a question classical fraud signals cannot answer, because an agent arrives with a real browser, a real fingerprint and a real mailbox.
Built for developers. REST, an MCP server for AI tooling, official Node and Python SDKs, a live demo that needs no signup, and a free tier that needs no card.
Predax
LayerCallPredax's answer
LayerCall's answer:
Because of what comes back in the response, not what it costs.
Every result carries a 0โ100 risk score, an allow / review / block verdict, and the individual signals behind it โ so a decision can be explained to a customer, a colleague or an auditor rather than only made. Strictness is tunable per request without re-scoring, which means the same integration can be strict at signup and forgiving at login.
Two smaller things tend to matter more in production than they sound. When a data source is unavailable, the response says so instead of quietly scoring lower, so an incomplete answer stays distinguishable from a clean one. And test keys return fixed, fictional data that never bills and never touches live reputation data, so a test suite can assert on exact values without polluting anything.
Beyond that, it is worth comparing directly rather than taking our word for it: the live demo runs the real scoring engine with no signup, and the free tier needs no card.
Predax's answer
LayerCall's answer:
Developers and small product teams who need a trust decision at signup, login or checkout, and who would rather call one endpoint than integrate several vendors and reconcile their answers by hand.
In practice that means SaaS signups, marketplaces, fintech onboarding, and anyone whose free tier is being farmed by throwaway accounts.
A newer part of the audience is teams who suddenly have to decide what an AI agent may do on their site. That is a different question from classical fraud โ an agent can be entirely legitimate and still need a policy โ which is why agent verification sits in the same API rather than in a separate product.
Predax's answer
LayerCall's answer:
TypeScript on Next.js, running on Vercel's Fluid Compute, with Postgres (Supabase) behind accounts, keys and usage.
The scoring path is deliberately boring. No third-party SDK sits in the request path; every external feed is fetched under its own timeout inside a request-wide deadline, so one slow source cannot hold up a response. A feed that fails degrades the result rather than failing the call, and the response names any signal that was unavailable so the caller can tell the difference between a clean answer and an incomplete one.
On the client side: official Node/TypeScript and Python SDKs, Express and Next.js middleware, a published OpenAPI spec, and an MCP server so AI tools can call the API directly.
Predax's answer
IPSentry is used by WordPress site owners, WooCommerce stores, and developers across multiple countries. As a privacy-focused company, we don't publicly disclose customer names without their permission.
Predax's answer
IPSentry started from a personal frustration. I was running content sites monetised with Google AdSense, and kept getting hammered by waves of VPN and proxy traffic. This non-genuine traffic was dragging down my overall RPM โ advertisers don't pay premium rates when their ads are being served to masked, unverifiable visitors. My revenue was suffering and I had no visibility into what was hitting my sites.
I wanted control over my traffic. I wanted to see exactly who was visiting, filter out the junk, and make informed decisions about what to allow and what to block. I looked for a WordPress plugin that could do this โ detect VPN and proxy visitors, flag them, let me decide what to do โ and found nothing that actually worked. The few options that existed were either broken, absurdly expensive, or required wiring up an external API with custom code.
So I built my own. It started as a simple IP lookup tool, then grew into a full detection API with VPN, proxy, Tor, and datacenter identification. I added a WordPress plugin so any site owner could install it in one click and immediately see and control their traffic, then a WooCommerce plugin for fraud prevention at checkout.
The Community Threat Network came next โ the idea that when one site blocks a bad actor, every other IPSentry user benefits from that intelligence. Today IPSentry protects sites across multiple countries with millions of IP lookups per month.
LayerCall's answer:
It started from a specific frustration: the signal that actually catches a fake signup is usually a relationship between fields, and the tools available answered one field at a time.
Blocking disposable email domains stops very little on its own. The signups that matter use real mailboxes, often on domains registered days earlier, arriving from addresses that look entirely ordinary. What gives them away is the domain's age set against the IP's provider set against whether the phone is a VoIP line โ and assembling that meant several vendors, several response shapes, several bills, and writing the correlation by hand anyway.
LayerCall is that correlation as a product: one call, every signal, and the reasoning returned next to the score.
The AI-agent side came later, from the same observation in a new place. An agent has a real browser, a real fingerprint and a real mailbox, so nothing in a classical fraud stack has an opinion about it. What you need to know is which agent it is and whether it can prove it โ a signature problem, not a fraud-signal problem.
Predax's answer
IPSentry combines real-time IP intelligence with community-powered threat detection โ something no other provider offers at this price point.
LayerCall's answer:
Most fraud APIs answer one question per call โ is this IP a VPN, is this email disposable, is this phone real. LayerCall returns IP, email, phone, domain and device together, and scores the relationships between them. A brand-new domain paired with a datacenter IP and a throwaway mailbox is obvious in combination and unremarkable one field at a time.
Every response also carries the reasoning: a 0โ100 risk score, an allow / review / block verdict, and the individual signals behind it, so a decision can be explained rather than only made.
It treats AI agents as a first-class case as well. Web Bot Auth signature verification establishes which agent is calling and whether it can prove it, and a policy engine decides what it is allowed to do โ a question classical fraud signals cannot settle, because an agent arrives with a real browser, a real fingerprint and a real mailbox.
IPQualityScore - IPQualityScore (IPQS) proactively prevents fraud without disrupting the user experience. Access leading fraud prevention tools to detect bots, emulators, VPNs, proxies, stolen user data, and fake users.
ipinfo.io - Simple IP address information.
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ZeroBounce - Removes invalid emails from your list to prevent email bounces from ruining your deliverability.
Sift - Digital Trust & Safety enables your business to grow, innovate, introduce new products, features, and business models โ without increased risk.
Abstract APIs - Simple, powerful APIs for everyday dev tasks