1
Keep uptime and SSL
Every check confirms the site responds and that certificates and DNS are healthy.
NorthDuty vs HetrixTools
HetrixTools is known for affordable uptime monitoring and blacklist monitoring. If you are comparing alternatives, the question is whether you also need rendered page-health checks, visual change detection, and user journeys alongside availability.
More than uptime and blacklist checks — rendered page health, visual diffs, and journeys.
Where uptime-and-blacklist monitoring focuses
HetrixTools does a useful job of uptime monitoring and blacklist monitoring at a low price, which is valuable for teams that care about availability and about whether their domain or IP has landed on a blacklist.
The gap appears when the concern is the rendered customer experience: a page that loads blank after a deploy, a button that disappears, or a checkout that stops completing. Uptime and blacklist checks confirm reachability and reputation, not whether the page actually works for a visitor.
Why rendered page health and journeys matter
Many costly failures happen while a site is reachable and its reputation is clean: a blank page, a JavaScript error that disables a button, a layout shift that hides a call-to-action, or a broken checkout flow.
NorthDuty renders each page on every health check to catch those failures, tracks SSL and DNS, diffs stabilized screenshots for visual regressions, and runs plain-text or AI-suggested user journeys — with alerts to email, Slack, and more, and a free plan to start.
NorthDuty vs HetrixTools
Both cover uptime affordably; the difference is depth into rendered page health and journeys.
| Criteria | NorthDuty | HetrixTools |
|---|---|---|
| Core focus | Rendered website health, visual change, and journeys with uptime, SSL, and DNS | Uptime monitoring and blacklist monitoring |
| Catches 'up but broken' | Yes — blank pages, JS errors, broken resources, and failed journeys | Focused on availability and blacklist reputation |
| Visual change detection | Scheduled screenshot diffs against a baseline | Not a focus |
| User journeys | Plain-text or AI-suggested multi-step journeys | Not a focus |
| Best for | Teams needing to know pages and flows actually work | Teams wanting affordable uptime and blacklist checks |
How NorthDuty adds depth past uptime and blacklist checks
NorthDuty focuses on the rendered visitor experience.
2
Render the page
Each check loads the page in a real browser to catch blank pages and script errors.
3
Detect visual change
Screenshots are diffed against a baseline so layout and UI shifts are flagged.
4
Run key journeys
Confirm signup, login, and checkout complete with plain-text or AI-suggested journeys.
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
Website Monitoring
Learn how NorthDuty combines health checks, screenshot diffs, and editable user journeys in one website monitoring project.
Explore Website MonitoringFeature
Visual Regression Monitoring
Screenshot-based visual regression testing and website change detection for key pages — get pixel diffs on design, content, and layout changes, no code required.
Explore Visual Regression 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 Uptime Monitoring Tools
How to choose the best uptime monitoring tool: what to look for beyond a simple ping, the main categories of tools, and where deeper website health monitoring fits.
Read Best Uptime 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 HetrixTools alternative?
If you want rendered page-health checks, visual diffs, and user journeys in addition to uptime, NorthDuty is a strong alternative that still covers uptime, SSL, and DNS — and starts free.
Does NorthDuty do blacklist monitoring?
NorthDuty focuses on rendered website health, visual change, and user journeys rather than blacklist monitoring. Its strength is catching customer-facing failures that availability and reputation checks miss.
What does NorthDuty add over uptime-only 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 more than uptime and blacklist checks — rendered page health, visual diffs, and user journeys that catch customer-facing breakage.
Free forever plan, no credit card required — add your base URL and monitoring starts in minutes.