Used in 100+ countries worldwide

The internet's outage radar —
available everywhere

WebsiteDown™ is a real-time outage detection and uptime monitoring platform operated by Vantlir LLC, an Illinois-based company.

WebsiteDown™ tells you in seconds whether a service is offline for everyone or just you. We combine direct server probes with AI-powered web intelligence to surface outage signals from social media, status pages, and community reports — instantly.

100+
Countries covered
50M+
Checks per month
<3s
Average result time
99.9%
Monitor uptime

Our mission

Every minute a service is offline, real people are affected — customers who can't buy, workers who can't collaborate, and developers scrambling to diagnose the problem. WebsiteDown™ exists to give anyone instant, reliable clarity: is the service down, and who else is seeing it?

We built the platform we always wanted when something went wrong online. No ads, no bloated dashboards — just a fast, honest answer backed by real data from multiple global vantage points.

How it works

1
Direct HTTP probe
The moment you enter a domain, we fire an HTTP request from global infrastructure, measuring status code, response time, and reachability. Results arrive in under 3 seconds.
2
AI web intelligence
Vantlir Intelligence scans the live web — Twitter/X, Reddit, news sites, official status pages — for outage signals. It grades confidence and surfaces social quotes in real time.
3
Community pulse
Users can report issues they're experiencing. Aggregated reports help distinguish a personal network problem from a widespread global outage affecting thousands of people.
4
Outage history & trends
We track incident timelines and 24-hour anomaly charts so you can see if a site has been flaky all day or if the problem just started — useful context that ping tools never give you.

Global coverage — used in 100+ countries

WebsiteDown is used by people across 100 countries to check whether their favourite services are up. Whether you're in the US asking “is Netflix down?” or in India asking “is WhatsApp down?” — we deliver the same sub-3-second answer.

AfghanistanAlbaniaAlgeriaArgentinaArmeniaAustraliaAustriaAzerbaijanBangladeshBelarusBelgiumBoliviaBosnia & HerzegovinaBrazilBulgariaCambodiaCanadaChileChinaColombiaCosta RicaCroatiaCzech RepublicDenmarkEcuadorEgyptEstoniaEthiopiaFinlandFranceGeorgiaGermanyGhanaGreeceGuatemalaHondurasHong KongHungaryIndiaIndonesiaIranIraqIrelandIsraelItalyJapanJordanKazakhstanKenyaLatviaLithuaniaLuxembourgMalaysiaMexicoMoldovaMoroccoMyanmarNetherlandsNew ZealandNigeriaNorth MacedoniaNorwayPakistanPanamaPeruPhilippinesPolandPortugalRomaniaRussiaSaudi ArabiaSerbiaSingaporeSlovakiaSloveniaSouth AfricaSouth KoreaSpainSri LankaSwedenSwitzerlandTaiwanTanzaniaThailandTunisiaTurkeyUgandaUkraineUnited Arab EmiratesUnited KingdomUnited StatesUruguayUzbekistanVenezuelaVietnamYemenZambiaZimbabweBosniaCyprus

Frequently asked questions

How does WebsiteDown check if a website is down?
We send real HTTP probes to the target domain from global infrastructure, measuring response time, status code, and reachability. This is layered with AI intelligence that scans social media, official status pages, and news — delivering a verdict in under 3 seconds.
Is it free to use?
Yes. Manual checks with full AI analysis are free forever. Pro users unlock automated uptime monitoring with alerts via email, Telegram, and Discord.
Why does the check say a site is up when it feels slow?
Our direct probe checks reachability and HTTP response. A site can respond with a 200 OK while serving a degraded experience. Use the Speed Test tool to measure DNS resolution time, time to first byte (TTFB), and overall load performance.
Do you monitor from multiple locations?
Yes. We probe from several global vantage points so we can detect regional outages, CDN failures, and routing issues that only affect users in certain geographic areas.
How is this different from Downdetector?
Downdetector primarily aggregates user reports to detect outages. WebsiteDown combines user reports with direct server probes and real-time AI web intelligence — giving you a multi-signal answer rather than relying on a single data source.

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About WebsiteDown — Real-Time Outage Detection in 100+ Countries