Maskbreak vs IPQS
IPQualityScore (IPQS) is one of the most widely-used IP reputation APIs, built around a large database of known bad IPs. It works well for blocking datacenter proxies and known VPN exit nodes — but modern fraud has moved on. In 2026, the majority of fraud originates from residential IPs and fake browsers that IP-reputation lookups alone were never designed to catch.
Comparing several vendors at once? See our guide to the best IPQS alternatives in 2026.
Maskbreak vs IPQualityScore (IPQS) — Side by Side
| Feature | Maskbreak | IPQS |
|---|---|---|
| Response Latency | Under 150 ms | No published figure |
| VPN & proxy detection, service named | ✓ Yes, when known | Partial |
| Residential Proxy Detection | ✓ Full | Partial |
| Antidetect Browser Detection | ✓ Full | Partial |
| Agentic AI Bot Detection | ✓ Full | Partial |
| No CAPTCHA Required | ✓ Yes | ✓ Yes |
| Client-Side SDK Token | ✓ Yes | Enterprise add-on |
| Free Tier | ✓ 1,000 req/hr unlimited | ✓ 1,000 req/mo |
| Transparent Pricing | ✓ Yes | Partial |
| MCP Server for AI Agents | Hosted, free | Not documented |
| IP Reputation Database | ✓ Yes | ✓ Large database |
| Email Validation | — | ✓ Yes |
What is IPQualityScore (IPQS)?
IPQualityScore is a fraud prevention service offering IP reputation scoring, email validation, phone verification, and device fingerprinting. Founded in 2011, it has a large IP blacklist database and is popular for its low barrier to entry.
- Large IP blacklist database
- Email & phone validation
- Low-cost entry plans
- Fast API response for basic lookups
- Established track record
- Residential proxy detection is IP-reputation driven per the public docs — no documented device-layer cross-check
- No documented coverage of antidetect browsers (Kameleo, GoLogin, AdsPower)
- No documented coverage of agentic AI bots
- No published latency figures
- Device fingerprinting & client-side SDK are Enterprise add-ons, not in standard plans
- No documented hardening of fingerprinting against modern antidetect tooling
Free: 1,000 requests/hour, every signal, no card and no expiry. There is no paid tier.
Free tier: 1,000 requests/month (35/day cap). Paid plans from $99/month.
When to use IPQS, when to use Maskbreak
- Basic IP reputation checks where datacenter proxy blocking is sufficient.
- Your attackers use residential proxies or antidetect browsers
- You need detection in under 150ms server-side without slowing down your product
- You want to start free with no credit card
- You need CAPTCHA-free bot detection
- Your fraud arrives over residential proxies, fake browsers or AI-driven bots — IPQS's public documentation shows little coverage of vectors built to look clean to an IP reputation database
Don’t take our word for it
Run your own connection through the live scanner on our homepage — it returns a verdict from the same pipeline the API uses, no signup needed. On a VPN or proxy right now? Turn it on first and see if we catch it. You can also check whether any address sits on Tor or a cloud server with the free IP lookup tool — VPN and proxy verdicts, with the service named when known, come from a live visit like the scanner's.
Get started with Maskbreak — free
Free tier: 1,000 requests/hour. No card, no expiry. No CAPTCHA. Detects what IPQS misses.
Frequently Asked Questions
Is Maskbreak better than IPQS?
Maskbreak detects residential proxies, antidetect browsers (Kameleo, GoLogin), and AI bots — areas where IPQS’s public documentation shows limited or no coverage. IPQS is strong for IP reputation and email validation. If your threat model includes modern evasion techniques, Maskbreak is the better choice.
What does IPQS miss that Maskbreak catches?
Based on public documentation, IPQS does not advertise coverage of antidetect browsers, agentic AI bots, or IoT device hijacking, and its proxy detection is IP-reputation driven rather than device-layer. These are the fastest-growing fraud vectors in 2026. IPQS was designed for an era when fraud came from known datacenter IPs — that era is over.
Is there a free alternative to IPQS?
Yes. Maskbreak offers a free tier with 1,000 API requests per hour, no credit card required, and no expiry. IPQS free tier is limited to 1,000 requests per month and does not include device intelligence or antidetect browser detection.
Does Maskbreak detect residential proxies?
Yes. Maskbreak identifies residential proxy networks such as Bright Data and IPRoyal by name when the operator is known, using live network intelligence that tracks proxy operators rather than static IP blocklists, and corroborates with the device layer so a rotated address does not help.