What content change monitoring does
Content change monitoring tells you when the text on a web page changes. Point it at any URL, it snapshots the content, and it alerts you when something differs from the stored baseline.
This is different from uptime monitoring. Uptime monitoring checks whether a page is reachable, it looks at the HTTP status code. Content change monitoring compares the actual text on the page. A page can return 200 OK while its content has been completely rewritten. Uptime monitoring would say everything is fine. Content change monitoring would catch the change.
Two things this is useful for right away:
- Competitive intelligence. Monitor a competitor’s pricing page. When they change their plans or prices, you know within your check interval. No more manually checking every week.
- Defacement detection. Monitor your own pages. If someone edits your marketing site or status page without you knowing, you get an alert.
How it works
Setting up a content change monitor takes about 60 seconds.
Add a URL. Paste the page you want to monitor. Any public web page works.
Set a CSS selector (optional). If you only care about a specific part of the page, like the pricing table or the feature list, add a CSS selector to scope the check. Leave it empty to monitor the whole page.
Save your first snapshot. The first check captures a baseline. Every future check compares against this snapshot. If nothing changed, the monitor stays green.
Get alerted on changes. When content differs beyond your sensitivity threshold, we create an incident and notify you. You get a visual diff showing exactly what was added and removed. Like a git diff, but for web pages.
What you can monitor (and what you cannot)
Content change monitoring fetches static HTML. It works best on public pages with straightforward markup.
Works well on:
- Competitor pricing pages and feature lists
- Public changelogs and release notes
- Marketing pages and landing pages
- Your own site content (for defacement detection)
Does not work on:
- Pages behind login walls (content change monitoring has no session or cookie support)
- JavaScript-rendered content (the probe sees raw HTML, not the final rendered DOM)
- Pages that change on every load (dynamic timestamps, random elements, use a CSS selector to scope around these)
The CSS selector feature handles most of the dynamic content problem. If a competitor’s pricing page has a “last updated” timestamp that changes daily, scope to the pricing table element and ignore the rest of the page.
Pricing and limits
Content change monitors are available on all plans:
| Plan | Content change monitors | Check interval |
|---|---|---|
| Free | 1 | 24 hours |
| Solo ($12/mo) | 5 | 6 hours |
| Team ($29/mo) | 15 | 1 hour |
Free tier is enough to watch one competitor’s pricing page. Solo gives you a full competitive intelligence setup. Team is built for agencies monitoring multiple competitor sites plus your own pages for defacement detection.
Content change monitors count separately from uptime monitors. They do not use your uptime monitor quota. You get these in addition to whatever monitors your plan already includes.
Why nobody else has this
Uptime monitoring tools check whether a server is reachable. That is their entire job. Content change detection is a different class of problem, it needs text extraction, normalization, hashing, and diff rendering. The monitoring tools that do exist for this (VisualPing, Distill, ChangeTower) are standalone products with separate subscriptions.
We built it into PingWatchdog because the use cases overlap. The same team that monitors their uptime also wants to know when a competitor changes pricing. One dashboard, one subscription, one alert pipeline.
Frequently asked questions
What counts as a content change?
Any difference between the current page text and the stored baseline. You can set a sensitivity threshold (for example, “only alert if more than 5% of content changed”) to ignore minor formatting differences. CSS selectors also help, scope to a specific element and ignore everything outside it.
Can I monitor password-protected pages or JavaScript-rendered content?
No. Content change monitoring fetches static HTML. Pages behind a login wall or that render content entirely via JavaScript will not work. We recommend targeting public pages, competitor pricing, public changelogs, marketing pages. Headless browser rendering (for JavaScript pages) is on the roadmap but not in this release.
How is this different from uptime monitoring?
Uptime monitoring tells you if a page is up or down, it checks the HTTP status code. Content change monitoring tells you if the page content changed, it compares the actual text. A page can return 200 OK while its content has been defaced or updated. Content change monitoring catches what uptime checks miss. They are complementary: use uptime monitoring for availability, content change monitoring for content integrity.
Do content change alerts use the same alert channels?
Yes. Content change incidents go through the same alert pipeline as your other monitors. You get notified on Slack, Discord, email, Telegram, PagerDuty, or webhooks, whatever channels you already have configured.
What happens when I mark a change as “expected”?
The current snapshot becomes the new baseline. The incident resolves. Future checks compare against this new baseline. This is useful when you update your own site on purpose, mark the change as expected and monitoring continues with the new content as the reference.
Start monitoring content changes today. Set up your first content change monitor from the PingWatchdog dashboard. View plans and pricing to see what is included on each tier.