AI-Powered Web Monitoring

Never Miss a
Critical Website
Change

AI-powered monitoring for vendor pricing, compliance docs, and competitor moves. Guardian Engine watches your most important pages 24/7 and alerts you instantly when something meaningful changes.

See How It Works
500+ teams monitoring 10,000+ pages
guardianengine.com/dashboard
LIVE MONITORING OVERVIEW
42
Pages Monitored
7
Changes Detected
💲
Stripe Pricing Page
stripe.com/pricing
HIGH
📋
Compliance Update
sec.gov/rules/final
MED
📚
API Documentation
docs.twilio.com/api
LOW
● ALL SYSTEMS OPERATIONAL
10,000+
Pages Monitored
500+
Teams Protected
99.9%
Uptime
<5 min
Setup Time
Guardian Shield
Who It Helps

Built for Teams Who Can't Afford to Miss Changes

Whether you manage vendor relationships, ensure compliance, or stay ahead of competitors — Guardian Engine has you covered.

Customer Success Lead
Customer Success
The Support Lead
When vendor help docs or API references change, your support team is the last to know — until customers start complaining.
Help Center ChangesAPI DocsSOP Sync
Compliance Officer
Compliance & Legal
The Compliance Officer
Regulatory pages, terms of service, and policy documents change quietly. You need a verified audit trail — not a surprise.
Regulatory PagesAudit TrailTerms Changes
Founder
Founder & Executive
The Competitive Founder
Competitors adjust pricing, launch features, and pivot strategy. Catch those signals the moment they happen — not weeks later.
Competitor PricingProduct UpdatesMarket Intel
Operations Manager
Operations & Admin
The Ops Manager
Vendor portals, pricing pages, and process references can shift overnight. Stop reacting to surprises and start preventing them.
Vendor PricingPolicy ChangesProcess Docs
Guardian Shield
How It Works

Up and Running in Under 5 Minutes

No code, no complex setup. Add your URLs, let Guardian Engine do the rest.

1
Laptop with browser
Add URLs to Monitor
Paste any public URL — vendor pricing pages, compliance docs, competitor sites, API references, help centers. Add as many as your plan allows.
2
AI circuit board monitoring
Guardian Checks Automatically
Our AI engine visits each page on your schedule — every 15 minutes to daily. It captures content, compares snapshots, and flags meaningful changes.
3
Email notification alert
Get Instant AI Alerts
When something changes, you get an immediate alert with an AI summary explaining exactly what changed, why it matters, and what to do next.
Analytics dashboard showing monitoring results
Guardian Shield
Before & After

Stop Flying Blind. Start Knowing First.

See the difference Guardian Engine makes for teams who monitor critical pages.

❌  Without Guardian Engine
❌
Manually checking pages every few weeks — or never
❌
Finding out about changes from customer complaints
❌
SOPs and training docs silently going stale for months
❌
Vendor price increases hitting the budget unexpectedly
❌
No audit trail when compliance pages change
❌
Hours wasted manually investigating what actually changed
✅  With Guardian Engine
✅
24/7 automatic monitoring on every critical page
✅
Instant AI-powered alerts the moment anything changes
✅
SOPs stay current with automatic change detection
✅
Vendor changes caught before they impact your budget
✅
Full change history and compliance audit trail built automatically
✅
AI tells you exactly what changed and what to do in seconds
Average time saved: 8+ hours/month per team
Based on user-reported manual checking time
Guardian Shield
Free Risk Assessment

How Exposed Is Your Team to Silent Webpage Changes?

Vendor pricing, API docs, compliance pages, and SOP references change without warning. Most teams only find out after something breaks. Take the free Website Change Risk Assessment — get your personalized AI report with your risk score and exactly which pages to monitor first.

✓ No credit card  ·  ✓ AI report delivered instantly  ·  ✓ Personalized to your role
Guardian Shield
Key Features

Everything You Need to Stay Ahead of Change

Guardian Engine goes beyond simple alerts — it understands context, prioritizes what matters, and keeps your team one step ahead.

AI Change Analysis
Not just a diff — our AI reads the change and tells you what it means. Price increase? New requirement? Removed feature? You'll know instantly.
AI analysis
Smart Notifications
Severity-scored alerts sent to email, Slack, or your webhook. Configure thresholds so you only hear about changes that actually matter.
Smart notifications
Screenshot Comparisons
Visual before-and-after screenshots for every detected change. See exactly how the page looked before, and how it looks now — side by side.
Screenshot comparison
Automated Scheduling
Set custom check frequencies per page. Monitor competitor pricing hourly and compliance docs daily — all from a single dashboard.
Scheduling
Guardian Shield
Use Cases

What Teams Are Monitoring

From Fortune 500 ops teams to fast-growing SaaS startups — here's what Guardian Engine protects.

💲
Track Vendor Pricing Changes
Know the moment a supplier, SaaS tool, or vendor adjusts their pricing — before it hits your budget.
📘
Monitor API Documentation Updates
When a third-party API changes endpoints or deprecates features, your team knows before integration breaks.
⚖️
Stay Compliant with Regulation Changes
Watch regulatory pages, terms of service, and compliance documents with a full audit trail.
🔭
Competitor Intelligence, Automated
Track competitor pricing pages, feature announcements, and positioning changes as they happen.
  View Pricing →
Team working together
Guardian Shield
Social Proof

Teams Who Stopped Flying Blind

Monitoring 10,000+ pages for teams at SaaS companies, ops firms, compliance teams, and beyond.

FinTech Ops
HealthTech SaaS
B2B Analytics
Legal Services
E-commerce
Developer Tools
FinTech Ops
HealthTech SaaS
B2B Analytics
Legal Services
E-commerce
Developer Tools
★★★★★
"We caught a vendor price increase 3 weeks before it went live. That gave us time to renegotiate and saved us $40K in annual budget planning. Worth every penny."
Sarah M.
Sarah M.
Director of Operations, SaaS Company
★★★★★
"Our compliance team used to spend 8 hours a week manually checking regulatory pages and terms documents. With Guardian Engine, that's zero. The audit trail alone justified the cost."
James K.
James K.
Chief Compliance Officer, Financial Services
★★★★★
"Guardian flagged a competitor pricing change 2 hours after it went live. We updated our sales deck before our next call and closed 2 deals because we knew what they didn't."
Alex R.
Alex R.
Founder & CEO, B2B SaaS Startup
Guardian Shield
Pricing

Simple, Transparent Pricing

Start free, scale as you grow. No surprise charges, no hidden fees.

Free
$0 /month
Perfect for individuals and small teams getting started with monitoring.
  • 5 monitored pages
  • Daily checks
  • Email alerts
  • 7-day change history
  • Basic AI summaries
Get Started Free →
⭐ Most Popular
Pro
$29 /month
For growing teams who need reliable monitoring across all critical pages.
  • 50 monitored pages
  • Hourly checks
  • Email + Slack alerts
  • 30-day change history
  • Full AI change analysis
  • Screenshot comparisons
  • Custom alert thresholds
Team
$99 /month
For organizations that depend on comprehensive monitoring and full auditability.
  • 500 monitored pages
  • 15-minute checks
  • All alert channels + webhooks
  • Unlimited change history
  • Priority AI analysis
  • Full REST API access
  • Compliance audit reports
  • Priority support
  • NexusSOP integration
Request Access →
Guardian Shield
FAQ

Frequently Asked Questions

Everything you need to know about Guardian Engine.

It depends on your plan. Free plans check daily. Pro plans check hourly. Team plans check every 15 minutes. You can also set custom schedules per page — monitor competitor pricing hourly while checking compliance docs daily.

Guardian Engine detects text changes, price updates, removed content, new sections, structural changes, and more. Our AI filters out cosmetic noise (ads, dates, cookie banners) and focuses on meaningful content changes relevant to your use case.

Yes. You can set significance scores (minor / major / critical), configure keyword triggers, and choose which types of changes warrant an immediate alert vs. a daily digest. Pro and Team plans have full threshold control.

Yes. Guardian Engine was built as the AI monitoring layer for NexusSOP. When a page changes, Guardian can automatically flag the linked SOPs that may need updating. Team plan includes full NexusSOP integration.

All data is encrypted in transit (TLS 1.3) and at rest (AES-256). We only store the text content we compare — not login credentials or sensitive form data. We never sell your monitoring data.

Yes. Pro and Team plans include full REST API access — add URLs programmatically, retrieve change history, trigger manual checks, and receive webhooks on detected changes. Full OpenAPI documentation available.

Guardian Shield
Integrations

Works With Your Existing Workflow

Connect Guardian Engine to the tools your team already uses.

NexusSOP integration
Works with NexusSOP
Guardian Engine is the AI monitoring backbone of NexusSOP. When a vendor page or reference URL changes, the linked SOP is flagged automatically for review.
Included in Team plan →
API access for developers
API Access for Developers
Full REST API to add URLs, retrieve snapshots, trigger checks, and receive webhook alerts. Build Guardian Engine into your internal tools, CI/CD pipelines, and compliance workflows.
View API Docs →
Guardian Shield

Start Monitoring in Under 5 Minutes

Join 500+ teams who never miss a critical website change. Free plan available — no credit card required.

Get Started Free →

🎯 Website Change Risk Assessment

Step 1 of 11

🔊
🤖 Guardian AI Assistant
Hi! I'm your Guardian Engine assistant. Ask me anything about your SOPs or monitoring results.