# SiteVitals - Full Reference > SiteVitals is a UK-based SaaS platform providing continuous website health monitoring across uptime, SEO & AI visibility, security, page performance, integrity & assets, and content change intelligence. Built by Lisa and Tom - a husband-and-wife team with over 25 years of web development experience - for businesses that don't have a full-time developer watching their site. SiteVitals monitors websites from the outside, the same way visitors and search engines do. Nothing is installed on the monitored site. No code changes are required. All monitoring data is stored strictly within the UK and EU. Every detection across all monitors is logged to a shared, annotatable timeline so that when something goes wrong, users know exactly what changed and when. --- ## Product Overview SiteVitals is designed for marketers, agencies, freelancers, sole traders, in-house developers, and growing businesses that need professional-grade site monitoring without enterprise pricing or a dedicated technical team. It covers six monitoring disciplines - all on one shared dashboard and timeline. Key differentiators: - **Change Intelligence**: every alert and detection is timestamped to a shared timeline. Users can also log their own events (deployments, plugin updates, content edits) so regressions can always be traced to a cause. - **No per-seat pricing**: all plans include unlimited team members and client access. - **No installation required**: SiteVitals works entirely from the outside. - **UK & EU data residency**: all data stored within the UK and EU. - **Free tier available**: uptime monitoring is free forever, no credit card required. --- ## Features - Detailed ### Uptime & Availability Available on all plans including Free. Continuously monitors page availability and alerts users immediately when a site goes offline. Uses smart double-verification to eliminate false positives. Checks run every 1 minute (Marketer and Agency plans), every 5 minutes (Starter), or every 10 minutes (Free). Capabilities: - Instant alerts via email or webhook the moment a site goes down - Keyword presence checks - verify specific text exists on the page (e.g. to confirm a database is healthy) - Incident history log with start time, end time, and duration for every downtime event - Smart verification - every failure is double-checked before an alert is sent - 24/7 monitoring, including bank holidays - UK and EU based infrastructure for privacy compliance - Uptime history: 30 days (Free), 90 days (Starter), 180 days (Marketer), 365 days (Agency) --- ### SEO & AI Visibility Available on Starter plan and above. Monitors the technical SEO fundamentals that determine whether search engines and AI tools can properly find, understand, and recommend a site's content. Includes specific checks for AI discoverability - an increasingly important signal as AI-powered search grows. Capabilities: - **Metadata & Canonical Audit**: monitors title tag lengths (optimal 30–60 characters), meta description quality, duplicate detection, and canonical tag accuracy - **Schema Validation**: block-level JSON-LD validation against schema.org rules - required and recommended properties checked per @type, structural errors and warnings separated - **AI Readiness Scoring**: assesses schema blocks for entity clarity, sameAs authority links, speakable signals, and FAQ markup - the signals AI search tools use to understand and recommend content - **AI Crawler & llms.txt Audit**: confirms AI crawlers (GPTBot, ClaudeBot, PerplexityBot, and others) are permitted by robots.txt; checks whether llms.txt is present, well-formed, and useful to AI tools - **Indexing & Robots Integrity**: dual-layer verification across meta robots directives and robots.txt for noindex instructions that could silently remove pages from search - **Advanced Link Health**: automated crawler detects broken internal and external links - **Security & Mixed Content**: scans for insecure HTTP resources on HTTPS pages - **Smart Redirect Monitoring**: verifies HTTP requests redirect correctly to HTTPS - **Heading Structure Analysis**: analyses H1 usage and hierarchy - **Social Tag Completeness**: validates Open Graph and Twitter Card tags - History: 90 days (Starter), 180 days (Marketer), 365 days (Agency) --- ### Security Monitoring Available on Starter plan and above. Continuous checks on a site's security posture, covering headers, cookies, scripts, forms, and third-party dependencies. Flags vulnerabilities and configuration weaknesses before they can be exploited. Capabilities: - **Secure Infrastructure Audit**: identifies exposed server signatures and software version disclosures - **Hardened Header Validation**: monitors HSTS, Content Security Policy (CSP), X-Frame-Options, X-Content-Type-Options, Referrer-Policy, and Permissions-Policy - **Cookie & Session Security**: audits cookies for HttpOnly, Secure, and SameSite flags - **Form Injection Defence**: scans forms for missing CSRF protection and insecure submission methods - **Mixed Content & Resource Integrity**: validates Subresource Integrity (SRI) for external scripts - **Automated Software Forensics**: cross-references CMS and server versions against known vulnerability patterns (NVD database, updated daily) - **Browser-Side Risk Profiling**: detects configurations prone to clickjacking or DOM-based exploits - **JavaScript Issue Scanning**: detects inline event handlers, javascript: URLs, and URL-encoded JavaScript - Security score out of 100; failed and warning checks tracked over time - History: 90 days (Starter), 180 days (Marketer), 365 days (Agency) --- ### Integrity & Assets Available on Starter plan and above. Monitors the external dependencies a site relies on - SSL certificates, domain registration, third-party scripts, images, and fonts. These are often the hidden single points of failure that take a site offline or degrade it without any server-side error. Capabilities: - **SSL Chain Verification**: validates the full certificate chain is trusted by all major browsers; alerts when expiry is approaching - **Domain Expiry Guard**: monitors domain registration renewal dates and alerts well in advance - **Broken Asset Engine**: detects 404 errors on critical CSS, JS, and image dependencies - **Mixed Content Alerts**: identifies insecure HTTP resources loaded on HTTPS pages - **DNSSEC & Record Audit**: verifies DNS records are correctly configured and tamper-proof - Integrity score out of 100 - History: 90 days (Starter), 180 days (Marketer), 365 days (Agency) --- ### Change Intelligence (Content Monitoring) Available on Starter plan and above. Tracks content changes over time using computational similarity measures, and lets users log their own site changes (deployments, edits, plugin updates) alongside automated detections. When something shifts in performance or rankings, users have a dated timeline to investigate rather than a mystery to solve. Capabilities: - **Weighted Change Index**: quantifies shifts in content substance using Jaccard Similarity and Levenshtein distance; produces a change score between 0 and 1 - **External Dependency Fingerprinting**: maps and monitors every third-party domain loaded by the page to detect unauthorised resource injection - **Keyword Drift & Density**: tracks top semantic terms to ensure content remains aligned with target keywords over time - **Intelligent Content Noise Reduction**: strips navigation, headers, and footers to analyse only core body copy - **Visual & Asset Auditing**: monitors image counts and page weight to detect performance regressions caused by content changes - **Historical Structural Mapping**: alerts when H1 tags or title tags change - catches accidental or unauthorised structural changes - **Content Similarity Baseline**: compares current snapshots against historical data for semantic similarity scores - User-annotatable timeline: log your own events (deployments, edits, plugin updates) to create a full causal record - History: 90 days (Starter), 180 days (Marketer), 365 days (Agency) --- ### Page Performance Available on Starter plan and above. Deep monitoring of Core Web Vitals and PageSpeed metrics using the Google Lighthouse engine. Stores historical results so users can see exactly when performance changed and investigate what caused it. Capabilities: - **Core Web Vitals Engine**: real-time monitoring of LCP (Largest Contentful Paint), CLS (Cumulative Layout Shift), and INP (Interaction to Next Paint) with threshold validation - **Lighthouse Issue Extraction**: identifies specific CSS/JS filenames and DOM elements causing performance bottlenecks - **Automated Regression Logic**: detects and alerts on significant performance dips (>5 points) between crawls - **Resource Payload Audits**: categorised monitoring of total transfer size, render-blocking impact, and TTFB - **Visual Stability Forensics**: identifies specific unsized images causing layout shifts (CLS) - **Third-Party Script Analysis**: isolates and identifies the slowest external origins (e.g. GTM, Facebook SDK, chat widgets) - Scores tracked: Performance, Accessibility, Best Practices, SEO (Lighthouse categories) - Metrics tracked: LCP, FCP, CLS, SI (Speed Index), TBT (Total Blocking Time), INP, TTFB, JS execution time - History: 90 days (Starter), 180 days (Marketer), 365 days (Agency) --- ## Pricing All prices in GBP, excluding VAT where applicable. Annual billing available at 20% discount on all paid plans. ### Free - £0/month - 1 page monitored - 10-minute uptime check interval - Uptime & Availability module only - 30 days uptime history - Unlimited team seats - No credit card required ### Starter - £19/month (or £15.20/month billed annually) - 5 pages monitored - 5-minute uptime check interval - All 6 modules: Uptime, SEO & AI Visibility, Security, Integrity & Assets, Change Intelligence, Page Performance - 90 days history across all modules - Unlimited team seats - Instant alerts via email and webhook ### Marketer - £45/month (or £36/month billed annually) - 10 pages monitored - 1-minute uptime check interval - All 6 modules - 180 days history across all modules - Unlimited team seats ### Agency - £99/month (or £79.20/month billed annually) - 30 pages monitored - 1-minute uptime check interval - All 6 modules - 365 days history across all modules - Unlimited team seats - Designed for agencies monitoring client portfolios ### Enterprise - Custom pricing - 30+ pages - Custom data retention periods - Dedicated support - Tailored onboarding - Contact: support@sitevitals.co.uk or https://www.sitevitals.co.uk/about --- ## Company Information - **Product name**: SiteVitals - **Company**: 18a Productions Limited - **Company number**: 06735859 (Registered in England and Wales) - **Established**: 2007 - **Headquarters**: United Kingdom - **Support email**: support@sitevitals.co.uk - **Website**: https://www.sitevitals.co.uk - **Founders**: Lisa Freeman (CEO, product vision, client feedback) and Tom Freeman (Lead Developer) - **Team background**: 25+ years building and supporting websites for clients ranging from sole traders to NHS, BBC Two, Aardman, and national charities - **Data residency**: UK and EU only --- ## Key URLs - Homepage: https://www.sitevitals.co.uk - Features overview: https://www.sitevitals.co.uk/features - Uptime monitoring: https://www.sitevitals.co.uk/features/uptime - SEO & AI Visibility: https://www.sitevitals.co.uk/features/seo-essentials - Security monitoring: https://www.sitevitals.co.uk/features/security - Integrity & Assets: https://www.sitevitals.co.uk/features/integrity - Change Intelligence: https://www.sitevitals.co.uk/features/change-intelligence - Page Performance: https://www.sitevitals.co.uk/features/performance - Pricing: https://www.sitevitals.co.uk/pricing - Agency plans: https://www.sitevitals.co.uk/agencies - About Us: https://www.sitevitals.co.uk/about - Blog: https://www.sitevitals.co.uk/blog - API Documentation: https://www.sitevitals.co.uk/docs/api - Bot & Crawler Information: https://www.sitevitals.co.uk/bot-info - Support: support@sitevitals.co.uk - Sign up (free): https://www.sitevitals.co.uk/signup - Terms of Service: https://www.sitevitals.co.uk/terms-of-service - Privacy Policy: https://www.sitevitals.co.uk/privacy-policy