1
Use Sentry for post-error debugging
When a JS error reaches users, Sentry's stack traces, breadcrumbs, and session replay help engineers diagnose the cause fast.
Comparison
NorthDuty vs Sentry
Sentry is a developer-focused error and performance monitoring platform. NorthDuty is a website monitoring tool focused on proactive detection of page health issues, visual regressions, and broken user journeys — without requiring code instrumentation.
Error monitoring vs. proactive website monitoring
Sentry excels at capturing JavaScript exceptions, stack traces, release comparisons, and session replay — after errors occur in your instrumented application code.
Proactive website monitoring checks whether pages work from the outside, independently of your codebase. It catches blank pages, failed loads, missing UI, and broken flows before users encounter them — and without SDK integration.
Why outside-in monitoring catches different problems
NorthDuty checks website health from a browser context on a schedule: HTTP, SSL, DNS, blank pages, failed resources, JavaScript errors, and API call results — all without touching your source code or needing a Sentry SDK.
Visual diffs catch design and layout regressions that error monitoring misses entirely. User journeys verify that login, signup, checkout, and form submission still complete end to end on a schedule, surfacing failures before customers do.
NorthDuty vs Sentry
Choose based on whether you need reactive error capture or proactive page-health monitoring.
| Criteria | NorthDuty | Sentry |
|---|---|---|
| Approach | Proactive outside-in monitoring on a schedule | Reactive error capture from instrumented code |
| Setup | Add a base URL — no SDK or code changes needed | SDK integration in your application code |
| Visual change detection | Screenshot sets and pixel-diff results | Not a core use case |
| User journey monitoring | AI-suggested or plain-text flows, no code | Session replay and performance tracing |
| Best for | Detecting page failures before users report them | Diagnosing errors after they occur in instrumented apps |
| Business teams | Readable by marketing, product, and agency teams | Primarily engineering-focused |
How NorthDuty complements Sentry
Many teams use both: Sentry for error debugging, NorthDuty for proactive page health.
2
Use NorthDuty for scheduled page checks
NorthDuty catches blank pages, missing CTAs, broken flows, and visual regressions before users encounter them — from outside your codebase.
3
Add visual diffs after every deploy
Screenshot comparisons surface unexpected layout changes that errors alone do not catch.
4
Run critical user journeys on a schedule
Automatically verify login, signup, checkout, and form submission regularly — without writing or maintaining Playwright scripts.
Explore Related NorthDuty Pages
Review the product pages and supporting content that explain the monitoring depth behind the comparison.
Feature
Website Monitoring
Learn how NorthDuty combines default 5-minute website health checks, screenshot-based UI diffs, and editable user journey monitoring in one project.
Explore Website MonitoringFeature
Uptime Monitoring
Monitor uptime every 5 minutes by default with HTTP, SSL, DNS, blank-page detection, broken resources, JavaScript errors, and API call tracking.
Explore Uptime MonitoringFeature
UI Changes Monitoring
Get screenshot-based pixel diffs for key website pages so unexpected design, content, and layout changes are easier to review.
Explore UI Changes MonitoringFeature
User Journey Monitoring
NorthDuty AI suggests 2-5 website journeys. Enable them in one click or describe a custom multi-step flow in plain text.
Explore User Journey MonitoringArticle
How to Monitor JavaScript Errors on a Website
Learn how to monitor JavaScript errors on important website pages so front-end failures do not break forms, checkout, signup, or page rendering.
Read How to Monitor JavaScript Errors on a WebsiteArticle
Why Websites Break Without Going Offline
Learn why websites can break without going fully offline and how website health monitoring helps detect silent failures.
Read Why Websites Break Without Going OfflinePricing
Pricing
Explore NorthDuty pricing for website monitoring covering uptime checks, UI change detection, and user journey monitoring.
Compare pricing plansFrequently Asked Questions
Answers to common buying questions for teams comparing monitoring options.
Is NorthDuty a Sentry alternative?
For proactive website health monitoring, visual diffs, and user journey verification, yes. For post-error debugging with stack traces, they serve complementary purposes.
Does NorthDuty require SDK integration?
No. NorthDuty monitors websites from the outside using a base URL. No code changes or SDK installation required.
Can I use NorthDuty and Sentry together?
Yes. NorthDuty is best for proactive scheduled monitoring; Sentry is best for reactive error debugging. They complement each other well.
Call To Action
Start monitoring your website with NorthDuty today.
Use NorthDuty to proactively monitor website health, visual changes, and user journeys — no SDK or code changes required.