1
Keep uptime, SSL, and DNS
Every check still confirms the site responds and that certificates and resolution are healthy.
NorthDuty vs Oh Dear
Oh Dear is a polished monitoring tool for uptime, certificate health, broken links, and scheduled tasks. If you are comparing alternatives, the question is whether you also need rendered page-health checks, visual change detection, and user journeys in the same place.
Keep clean uptime and certificate checks — and add rendered page health, visual diffs, and journeys.
Where uptime-and-certificate monitoring focuses
Oh Dear does a clean job of the essentials many sites need: uptime checks, certificate monitoring (including the full chain of trust), broken-link crawling, scheduled-task (cron) monitoring, DNS, and performance timing. For a lot of teams that is a well-rounded package.
The gap appears when the concern is less 'is the site up and are the links and certificates healthy' and more 'did this deploy blank a page, move a button, or break the checkout journey'. Catching those needs the page rendered and key flows exercised, not just requested.
Why rendered page health and journeys matter
Many costly failures happen while a site is technically up and its links and certificate are fine: a blank page after a release, a script error that disables a button, a layout shift that hides a call-to-action, or a checkout that stops completing.
NorthDuty renders every page in a real browser on each health check — catching blank pages, JavaScript errors, broken resources, and failed API calls — and adds screenshot-based visual diffs and AI-suggested or plain-text user journeys, alongside the SSL and DNS checks you would expect.
NorthDuty vs Oh Dear
Both cover uptime and certificates well; the difference is depth into rendered page health and user journeys.
| Criteria | NorthDuty | Oh Dear |
|---|---|---|
| Core focus | Rendered website health, visual changes, and user journeys with uptime and SSL/DNS | Uptime, certificate health, broken links, scheduled tasks, and performance |
| Catches 'up but broken' | Yes — blank pages, JS errors, broken resources, and failed journeys are core | Focused on availability, certificates, and link health rather than rendered UI failures |
| Visual change detection | Scheduled, stabilized screenshots diffed pixel-by-pixel against a baseline | Not a primary focus |
| User journeys | AI-suggested or plain-text multi-step journeys run on a schedule | Not a primary focus |
| Best for | Teams that need to know important pages and flows actually work | Teams wanting clean uptime, certificate, broken-link, and cron monitoring |
How NorthDuty adds depth past uptime and certificates
NorthDuty keeps the essentials and adds the rendered-experience layer.
2
Render the page
Each check loads the page in a real browser to catch blank pages, script errors, and broken resources.
3
Watch for visual change
Screenshots are diffed against a baseline so layout shifts and missing UI are flagged.
4
Exercise key journeys
Plain-text or AI-suggested journeys confirm signup, login, and checkout still complete.
Explore Related NorthDuty Pages
Review the product pages and supporting content that explain the monitoring depth behind the comparison.
Feature
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
SSL Certificate Monitoring
Monitor SSL certificates with NorthDuty website health checks so validity, trust, and expiry issues are visible before visitors are blocked.
Explore SSL Certificate 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
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 OfflineArticle
Best Website Monitoring Tools
Compare website monitoring tools and learn how to choose the right option for uptime, page health, user journeys, and business-critical reliability.
Read Best Website Monitoring ToolsPricing
Pricing
NorthDuty pricing for website monitoring: Free, $29 Starter, $79 Pro, $199 Business, and $499 Enterprise plans.
Compare pricing plansFrequently Asked Questions
Answers to common buying questions for teams comparing monitoring options.
What is a good Oh Dear alternative?
It depends on whether you need uptime and certificate monitoring alone or also want rendered page-health checks, visual diffs, and user journeys. NorthDuty covers the essentials and adds that rendered-experience depth.
Does NorthDuty monitor certificates like Oh Dear?
Yes. NorthDuty checks SSL certificate validity and expiry as part of every health check, alongside DNS resolution and uptime.
What does NorthDuty add over uptime-and-certificate tools?
Rendered page-health checks that catch blank pages and JavaScript errors, pixel-based visual change detection, and scheduled user journeys for flows like checkout and login.
Call To Action
Start monitoring your website with NorthDuty today.
Choose NorthDuty when you want clean uptime and certificate monitoring plus rendered page health, visual diffs, and user journeys in one place.
Free forever plan, no credit card required — add your base URL and monitoring starts in minutes.