--- title: "FourSight - Multi-Region Uptime Monitoring - TetraCore" description: "Monitor websites, APIs, and infrastructure from 4 global regions. HTTP, DNS, SSL, and port checks with instant alerts. Free forever." lang: en json-ld: | [ { "@context": "https://schema.org", "@type": "SoftwareApplication", "name": "FourSight", "applicationCategory": "BusinessApplication", "operatingSystem": "Web", "url": "https://foursight.cloud", "sameAs": "https://foursight.cloud", "publisher": { "@type": "Organization", "@id": "https://tetracorehq.com/#organization", "name": "TetraCore" }, "description": "Multi-region uptime monitoring platform with HTTP, DNS, SSL, and port checks from 4 global regions every 30 seconds.", "offers": [ { "@type": "Offer", "name": "Free", "price": "0", "priceCurrency": "USD" }, { "@type": "Offer", "name": "Starter", "price": "16", "priceCurrency": "USD", "priceSpecification": { "@type": "UnitPriceSpecification", "price": "16", "priceCurrency": "USD", "billingDuration": "P1M" } }, { "@type": "Offer", "name": "Growth", "price": "40", "priceCurrency": "USD", "priceSpecification": { "@type": "UnitPriceSpecification", "price": "40", "priceCurrency": "USD", "billingDuration": "P1M" } }, { "@type": "Offer", "name": "Pro", "price": "80", "priceCurrency": "USD", "priceSpecification": { "@type": "UnitPriceSpecification", "price": "80", "priceCurrency": "USD", "billingDuration": "P1M" } }, { "@type": "Offer", "name": "Scale", "price": "160", "priceCurrency": "USD", "priceSpecification": { "@type": "UnitPriceSpecification", "price": "160", "priceCurrency": "USD", "billingDuration": "P1M" } } ] }, { "@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [ { "@type": "Question", "name": "How does multi-region monitoring work?", "acceptedAnswer": { "@type": "Answer", "text": "FourSight checks your services from 4 geographically distributed regions simultaneously. An incident is only triggered when multiple regions confirm the issue, dramatically reducing false positives caused by localized network problems." } }, { "@type": "Question", "name": "What happens when downtime is detected?", "acceptedAnswer": { "@type": "Answer", "text": "When multiple regions confirm an outage, FourSight automatically creates an incident, sends alerts through your configured channels (email, Slack, webhooks, SMS), and updates your public status page — all within seconds." } }, { "@type": "Question", "name": "Can I monitor internal or private services?", "acceptedAnswer": { "@type": "Answer", "text": "FourSight monitors publicly accessible endpoints. For internal services, you can monitor any port or endpoint that is reachable from the internet, including APIs behind authentication using custom headers." } }, { "@type": "Question", "name": "How do status pages work?", "acceptedAnswer": { "@type": "Answer", "text": "You get branded, public-facing status pages that automatically reflect the real-time state of your monitors. You can customize the appearance, group monitors, and post manual updates during incidents." } }, { "@type": "Question", "name": "Is there a long-term contract?", "acceptedAnswer": { "@type": "Answer", "text": "No. All plans are month-to-month with no long-term commitment. You can upgrade, downgrade, or cancel at any time. The Free tier is free forever with no credit card required." } }, { "@type": "Question", "name": "What monitor types are supported?", "acceptedAnswer": { "@type": "Answer", "text": "FourSight supports HTTP(s), keyword, SSL certificate, DNS, domain expiry, ping (ICMP), and TCP port monitoring — covering virtually every aspect of your infrastructure." } } ] } ] --- [![TetraCore Logo](/lovable-uploads/f8ea3e1f-4668-4dc0-aedd-6bfcdfc60d00.png)TetraCore ](/) [Home](/) [Products](/products) [Services](/services)[About](/about)[Insights](/insights)[Support](/support)[Start a Project](/contact) Uptime Monitoring Platform # Monitor. Detect. Resolve. FourSight monitors your websites, APIs, and infrastructure from 4 global regions every 30 seconds. Get instant alerts via email, Slack, webhooks, or SMS — and keep your users informed with branded status pages. [Start Monitoring Free](https://foursight.cloud/auth?signup=true)[View Pricing](https://foursight.cloud/pricing) No credit card required · 10 free monitors forever ## 7 Monitor Types, 4 Global Regions Comprehensive monitoring for every layer of your stack — validated from multiple continents simultaneously. ### HTTP(s) Monitoring Monitor any URL with configurable methods, headers, and expected status codes. Validate response times from 4 global regions. ### Keyword Monitoring Verify specific content exists (or doesn't) on your pages. Catch defacements, missing content, or unexpected changes. ### SSL Certificate Monitoring Track certificate expiration, issuer changes, and validity. Get alerts before your certs expire. ### DNS Monitoring Verify DNS records resolve correctly across regions. Catch propagation issues and unauthorized changes. ### Domain Expiry Monitoring Never lose a domain. Get notified well before your domain registrations expire. ### Ping Monitoring ICMP-based monitoring to verify host reachability from multiple global vantage points. ### Port Monitoring Check that specific TCP ports are open and responding. Monitor databases, mail servers, and custom services. ## Up and Running in Minutes Three simple steps to global uptime monitoring. 1 ### Add Your Monitors Enter URLs, domains, or IPs. Configure check types, intervals, and alert preferences. 2 ### We Check Globally FourSight validates from 4 regions every 30 seconds. Multi-region consensus eliminates false positives. 3 ### Get Alerted Instantly When downtime is confirmed, receive alerts via email, Slack, webhooks, or SMS within seconds. Alerting ## Never Miss Downtime Get notified through the channels your team already uses. ### Email Instant email alerts with incident details and recovery notifications. ### Slack Real-time Slack notifications to your team's channels. ### Webhooks Push incident data to any endpoint for custom integrations. ### SMS Critical alerts via text message so you never miss downtime. ## Everything You Need to Stay Online Beyond monitoring — FourSight is a complete incident and status management platform. ### Public Status Pages Branded, customizable status pages to keep your users informed during incidents. ### Maintenance Windows Schedule maintenance periods to suppress alerts and show planned downtime on status pages. ### Incident Management Automatic incident creation, timeline tracking, and resolution workflows. ### Multi-Region Consensus Checks from 4 global regions prevent false positives. Incidents only trigger when multiple regions confirm. ### Organizations & Teams Invite team members, manage roles, and collaborate on monitoring across your organization. ### 30-Second Intervals Check as frequently as every 30 seconds for near-instant downtime detection. ## Simple, Transparent Pricing Start free. Scale when you're ready. No surprises. ### Free $0 forever For side projects and personal sites. - Up to 10 monitors - HTTP & Ping monitor types - 5-minute check intervals - Multi-region validation (4 regions) - Email alerts only - 1 status page - 24-hour history - Incident timeline [Start Free](https://foursight.cloud/auth?signup=true) ### Starter $16 /month For indie devs & small SaaS teams. - Up to 50 monitors (expandable) - HTTP & Ping monitor types - 1-minute check intervals - Multi-region validation (4 regions) - Email, Slack & Webhook alerts - Up to 2 status pages - 14-day history & charts - Incident management - Maintenance windows - Single user [Get Started](https://foursight.cloud/auth?signup=true) Most Popular ### Growth $40 /month For teams that need comprehensive monitoring. - Up to 100 monitors (expandable) - All 8 monitor types - 30-second check intervals - Multi-region validation (4 regions) - Email, Slack & Webhook alerts - Up to 5 status pages - 30-day history & charts - Escalation policies - Maintenance windows (one-time & recurring) - Multi-user orgs with roles [Get Started](https://foursight.cloud/auth?signup=true) ### Pro $80 /month For funded startups and agencies. - Up to 250 monitors (expandable) - All 8 monitor types - 30-second check intervals - Multi-region validation (4 regions) - Email, Slack, Webhook & SMS alerts - Up to 10 status pages with custom CSS - 90-day history & charts - Advanced incident timelines - Unlimited escalation policies - Maintenance windows (one-time & recurring) - Multi-user orgs with role-based access - Priority support [Get Started](https://foursight.cloud/auth?signup=true) ### Scale $160 /month For agencies and serious SaaS teams. - 500+ monitors - All 8 monitor types - 15-second check intervals - Multi-region validation (4 regions) - All alert channels + phone support - Up to 25 status pages with custom domains - 1-year history & charts - SLA guarantee - White-label status pages - Unlimited escalation policies - Multi-user orgs with role-based access - Dedicated support [Contact Sales](https://foursight.cloud/pricing) ## Frequently Asked Questions ### How does multi-region monitoring work? ### What happens when downtime is detected? ### Can I monitor internal or private services? ### How do status pages work? ### Is there a long-term contract? ### What monitor types are supported? ## Ready to Know Before Your Users Do? Start monitoring in minutes. 10 monitors free, forever — no credit card required. 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