--- title: "Uptime Monitoring Without False Alerts — Free Plan | FourSight" description: "Multi-region uptime monitoring with 4-region consensus, 8 check types & status pages. Alerts via email, Slack, webhook & SMS. Free plan — commercial use OK." lang: en json-ld: | [ { "@context": "https://schema.org", "@type": "Organization", "name": "FourSight", "url": "https://foursight.cloud", "logo": "https://foursight.cloud/logo-512.png", "description": "Multi-region website monitoring with HTTP, DNS, SSL, port & keyword checks." }, { "@context": "https://schema.org", "@type": "WebSite", "name": "FourSight", "url": "https://foursight.cloud", "description": "Multi-region website monitoring with HTTP, DNS, SSL, port & keyword checks." }, { "@context": "https://schema.org", "@type": "SoftwareApplication", "@id": "https://foursight.cloud/#software", "name": "FourSight", "applicationCategory": "BusinessApplication", "operatingSystem": "Web", "url": "https://foursight.cloud", "description": "Multi-region uptime monitoring for SaaS founders. 8 check types, 4-region consensus, alerts via email, Slack, webhooks & SMS. Free plan allows commercial use.", "publisher": { "@type": "Organization", "@id": "https://tetracorehq.com/#organization", "name": "TetraCore", "url": "https://tetracorehq.com/" }, "offers": [ { "@type": "Offer", "price": "0", "priceCurrency": "USD", "name": "Free", "description": "10 monitors — For side projects and personal sites." }, { "@type": "Offer", "price": "16", "priceCurrency": "USD", "name": "Starter", "description": "50 monitors — For indie devs & small SaaS teams.", "priceSpecification": { "@type": "UnitPriceSpecification", "price": "16", "priceCurrency": "USD", "billingDuration": "P1M" } }, { "@type": "Offer", "price": "40", "priceCurrency": "USD", "name": "Growth", "description": "100 monitors — For teams that need comprehensive monitoring.", "priceSpecification": { "@type": "UnitPriceSpecification", "price": "40", "priceCurrency": "USD", "billingDuration": "P1M" } }, { "@type": "Offer", "price": "80", "priceCurrency": "USD", "name": "Pro", "description": "250 monitors — For funded startups and agencies.", "priceSpecification": { "@type": "UnitPriceSpecification", "price": "80", "priceCurrency": "USD", "billingDuration": "P1M" } }, { "@type": "Offer", "price": "160", "priceCurrency": "USD", "name": "Scale", "description": "500+ monitors — For agencies and serious SaaS teams.", "priceSpecification": { "@type": "UnitPriceSpecification", "price": "160", "priceCurrency": "USD", "billingDuration": "P1M" } } ] }, { "@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [ { "@type": "Question", "name": "How often do you check my sites?", "acceptedAnswer": { "@type": "Answer", "text": "Free plans check every 5 minutes, Starter every 60 seconds, Growth and Pro every 30 seconds, and Scale every 15 seconds — all from 4 global regions." } }, { "@type": "Question", "name": "What happens when downtime is detected?", "acceptedAnswer": { "@type": "Answer", "text": "We confirm across multiple regions, create an incident with severity levels, send alerts to all your configured channels, and log everything on a timeline." } }, { "@type": "Question", "name": "Do I need a credit card to start?", "acceptedAnswer": { "@type": "Answer", "text": "No. The Free plan is completely free — no card, no trial expiration. Get up to 10 monitors with HTTP & Ping checks." } } ], "speakable": { "@type": "SpeakableSpecification", "cssSelector": [ ".faq-answer" ] } } ] --- [FourSight ](/) [Features](/#features)[Pricing](/pricing)[Guides](/guides)[Glossary](/glossary)[FAQ](/faq) [Login](/auth)[Start free](/auth?signup=true) [Start free](/auth?signup=true) Built for teams who pay for uptime # Your uptime monitor cried wolf. Again. Multi-region **uptime monitoring** that confirms downtime from 4 global regions before paging you — so every notification means a real outage. [Start monitoring free — 10 monitors, no card](/auth?signup=true&plan=free) Free plan includes commercial use — monitor client and production sites. [See a live status page — we monitor FourSight with FourSight](/status/demo) 4-region consensus monitoring Alert in <60s of real outage 8 check types, one flat price Incident detected api.example.com Confirming across all probe regions before paging you… US United States DOWN EU Europe DOWN CA Canada DOWN APAC Asia-Pacific DOWN Real outage confirmed 4 of 4 regions agree · Alert sent in 42s Quick Start ## Start monitoring in under 60 seconds Step 1 ### Add URL Enter your app, API, or website URL. Step 2 ### Choose Regions Check uptime from multiple global regions for real-world accuracy. Step 3 ### Get Alerts Receive instant email, Slack, or webhook alerts when something breaks. [Start Monitoring Free](/auth?signup=true) [View Live Demo Status Page](/status/demo) We monitor FourSight with FourSight — [watch the live status page](/status/demo). Built and operated by [TetraCore](https://tetracorehq.com), the Ohio software studio. Monitor Types ## Eight check types. Four global regions. From simple pings to port-level protocol validation — FourSight covers every angle of site and infrastructure reliability. ### HTTP & Uptime Checks Monitor any URL with configurable expected status codes, headers, response body validation, and custom timeouts. ### Keyword / Content Verify pages contain (or don't contain) specific text — catch defacements, broken deploys, and content changes instantly. [ ### SSL Certificate Monitoring Track certificate expiry with 30, 14 & 7-day alerts so you never serve an insecure warning to visitors. Learn more → ](/features/ssl-monitoring)[ ### DNS Drift Detection Monitor DNS record changes and get alerted when records drift from expected values across any record type. Learn more → ](/features/dns-monitoring)[ ### Domain Expiry Tracking Track domain registration expiry via RDAP with alerts at 90, 60, 30 & 10 days before your domain lapses. Learn more → ](/features/domain-expiry-monitoring) ### Ping Monitoring TCP-based latency and packet loss measurement across multiple attempts — ideal for infrastructure health checks. [ ### Port Monitoring TCP/UDP port checks with banner detection, send/expect regex, and presets for SMTP, IMAP, FTP, SSH, DNS & more. Learn more → ](/features/port-monitoring)[ ### Heartbeat Monitoring Monitor recurring signals from background jobs, cron scripts, webhooks, and scheduled tasks using fixed intervals or 5-field cron expressions. Learn more → ](/features/cron-job-monitoring) ### Multi-Region Validation Checks run from US, Canada, Europe & APAC with quorum-based consensus to eliminate false positives from regional outages. Alerting ## Get notified your way Four notification channels so your team never misses a beat — from inbox to Slack to custom webhooks. ### Email Alerts Instant email notifications with rich HTML templates, configurable per-monitor rules, and one-click unsubscribe. ### Slack Integration Real-time alerts to any Slack channel with Block Kit formatting, status emojis, and deep-link buttons to incidents. ### Webhooks JSON payloads with HMAC-SHA256 signing, event-type headers, and exponential backoff retries for reliable delivery. ### SMS Notifications Text message alerts to any phone number with E.164 formatting, carrier-compliant opt-in, and instant delivery. How it works ## Up and running in three steps 01 ### Add a monitor Enter a URL, choose a check type (HTTP, SSL, DNS, Port & more), set the interval. Done in 30 seconds. 02 ### We check globally Probes in 4 regions ping your endpoint on schedule and use quorum consensus to confirm real issues. 03 ### Get alerts + insights If something fails, you're notified via email, Slack, webhook, or SMS. Full history and uptime stats are always available. Platform ## Designed to be dependable #### Public Status Pages Branded, subscriber-ready pages your customers can bookmark. Add custom CSS, display maintenance banners, and let users subscribe to incident updates. #### Maintenance Windows Schedule one-time or recurring maintenance to suppress alerts and incidents. Supports daily, weekly & monthly RRULEs with configurable behavior. #### Incident Management Auto-created incidents with severity levels (critical, major, minor), status updates (investigating → resolved), and a full event timeline. #### Multi-Region Consensus Checks run from 4 regions with quorum-based voting. A single region going offline won't trigger false alerts for your team. #### Multi-Tenant Organizations Invite your team, assign roles (owner, admin, member), and manage monitors, status pages, and billing together. #### Configurable Intervals Free: 5-minute intervals. Starter: 1-minute intervals. Growth/Pro: 30-second intervals. Scale: 15-second intervals. Live Demo ## See FourSight in action Browse our live demo status page — real uptime data, latency charts, and incident history, exactly as your users would see it. [ FourSight Demo — Live Status Page All Systems Operational foursight.cloud HTTP 99.98% 87ms Public API HTTP 99.99% 42ms SSL Certificate SSL 100% 120ms DNS Records DNS 100% 18ms ](/status/demo) ![FourSight monitoring dashboard](/demo/dashboard.png) ![FourSight incident timeline](/demo/incident.png) [Create your first monitor in 60 seconds](/auth?signup=true) [View Live Demo](/status/demo) Pricing ## Simple, transparent pricing Start free. Upgrade when you need more monitors, faster checks, or advanced features. ### Free $0 forever - Up to 10 monitors - HTTP & Ping monitor types - 5-minute check intervals - Multi-region validation (4 regions) - Email alerts only [See details](/pricing) ### Starter $16/month - Up to 50 monitors (expandable) - HTTP & Ping monitor types - 1-minute check intervals - Multi-region validation (4 regions) - Email, Slack & Webhook alerts [See details](/pricing) ### Growth $40/month - Up to 100 monitors (expandable) - All 8 monitor types incl. Heartbeat (HTTP, Ping, SSL, DNS, Domain, Keyword, Port, Heartbeat) - 30-second check intervals - Multi-region validation (4 regions) - Email, Slack & Webhook alerts [See details](/pricing) ### Pro $80/month - Up to 250 monitors (expandable) - All 8 monitor types incl. Heartbeat - 30-second check intervals - Multi-region validation (4 regions) - Email, Slack, Webhook & SMS alerts [See details](/pricing) ### Scale $160/month - 500+ monitors - All 8 monitor types incl. Heartbeat - 15-second check intervals - Multi-region validation (4 regions) - All alert channels + phone support [See details](/pricing) FAQ ## Common questions #### How often do you check my sites? Free plans check every 5 minutes, Starter every 60 seconds, Growth and Pro every 30 seconds, and Scale every 15 seconds — all from 4 global regions. #### What happens when downtime is detected? We confirm across multiple regions, create an incident with severity levels, send alerts to all your configured channels, and log everything on a timeline. #### Do I need a credit card to start? No. The Free plan is completely free — no card, no trial expiration. Get up to 10 monitors with HTTP & Ping checks. [View all FAQs](/faq) ## Running monitoring for clients? White-label it. The Scale plan puts status pages on your clients' own domains with your branding, groups monitors per client, and keeps a year of history for monthly uptime reports — one flat price, no per-seat surprises. [FourSight for agencies](/solutions/agencies) ## Start monitoring in minutes No credit card required. 10 free monitors. Alerts via email, Slack, webhooks & SMS. [Sign up free](/auth?signup=true) [Login](/auth) FourSight © 2026 [TetraCore](https://tetracorehq.com/). All rights reserved. FourSight is a TetraCore product — Bowling Green, Ohio. Product [Pricing](/pricing)[Guides](/guides)[Glossary](/glossary)[FAQ](/faq)[About](/about)[For Agencies](/solutions/agencies)[For Startups](/solutions/startups)[Privacy](/privacy)[Terms](/terms) Features [Cron Job & Heartbeat Monitoring](/features/cron-job-monitoring)[SSL Certificate Monitoring](/features/ssl-monitoring)[Status Pages](/features/status-pages)[Domain Expiry Monitoring](/features/domain-expiry-monitoring)[DNS Monitoring](/features/dns-monitoring)[Port Monitoring](/features/port-monitoring) Compare [All comparisons](/compare)[vs UptimeRobot](/compare/uptimerobot-alternative)[vs StatusCake](/compare/statuscake-alternative)[vs Freshping](/compare/freshping-alternative)[vs Pingdom](/compare/pingdom-alternative)[vs Pulsetic](/compare/pulsetic-alternative)[vs Better Stack](/compare/better-stack-alternative)[vs Uptime Kuma](/compare/uptime-kuma-alternative)[vs Cronitor](/compare/cronitor-alternative)[vs Healthchecks.io](/compare/healthchecks-alternative)[vs Hyperping](/compare/hyperping-alternative) Pricing Guides [UptimeRobot Pricing](/compare/uptimerobot-pricing)[StatusCake Pricing](/compare/statuscake-pricing)[Pingdom Pricing](/compare/pingdom-pricing)[Better Stack Pricing](/compare/better-stack-pricing)[Uptime Kuma Pricing](/compare/uptime-kuma-pricing)[Cronitor Pricing](/compare/cronitor-pricing)[Healthchecks.io Pricing](/compare/healthchecks-pricing)[Hyperping Pricing](/compare/hyperping-pricing)[Pulsetic Pricing](/compare/pulsetic-pricing)