Guide
How to monitor website changes
Most people start by refreshing a page and hoping they notice. That works until you care about more than one URL, or until the change you needed happened at 2am. Website change monitoring fetches the page on a schedule and tells you when something moved. The useful question is not whether a pixel changed. It is whether something you actually care about changed.
Free plan · 10 monitored pages or sitemaps · Premium AI included · No credit card required
Tell Page Deltas what matters
alert me when the Hubspot pricing changes
🔔 Change detected on https://www.hubspot.com/pricing:
Price of the Professional plan went up from €749/mo to €792/mo.
What you are actually trying to catch
Teams watch public pages for competitor pricing and positioning, new sitemap URLs, careers pages, regulator or ToS rewrites, and tender RFPs. If the signal lives on LinkedIn or X rather than a web page, a website monitor will not see it.
Competitor pricing
Catch plan price, quota, and positioning changes the moment they ship — not after a weekly recap.
Competitor pricing monitoring →New pages via sitemap
Point a monitor at sitemap.xml and get alerted when brand-new URLs appear.
SEO & content monitoring →Hiring & careers pages
See new roles open on a competitor's careers page without checking it by hand.
Hiring intelligence monitoring →Terms of Service & legal
Know when a vendor quietly rewrites their ToS, privacy policy, or legal pages.
Terms of Service monitoring →Government tenders
Watch public RFP and tender pages so a new call for bids does not sit unnoticed.
Government tender monitoring →The three ways people monitor a page
A visual diff is still right if the job is tell me the banner moved. If the job is tell me when the Professional plan changes price, use option 3.
By hand
Refresh the page, squint at it, hope you notice. Fine for one URL you already live in. Falls apart at two URLs, or at 2am.
Any visual or text diff
Tools like Visualping fetch the page and show you what moved. You still read the diff. Cookie banners, rotating testimonials, and timestamps count as changes.
Page Deltas vs Visualping →Describe what matters and let software judge
Paste the URL, write a brief in plain English, and let Page Deltas decide whether the change matches what you asked for. Alerts arrive as a summary, not a wall of diffs.
Page Deltas vs Visualping →How to monitor a website in four steps
Pick the exact URL
Monitor the pricing page, not the homepage. Use sitemap.xml when the job is new URLs. A PDF is fine if that is the pack. Public pages only — no login yet. A sitemap monitor counts as one URL.
Write the description like a brief
Say what the page is, what you want to know, and what to ignore. Good: competitor pricing page — alert on plan price or quota changes; ignore cookie banners. Good: changelog new releases; jobs board new roles. Bad: "tell me when this changes"; a specific stale price; "alert on any change but ignore minor ones."
Send alerts where the team sits
Route them to Slack, Microsoft Teams, Discord, email, or a signed webhook. Send a test so you know the channel actually delivers.
Let the first check run
A new monitor is due immediately. You do not set an interval — an adaptive scheduler picks cadence, and higher plans get priority. Check now exists when you want a run on demand. Identical hash → stop, no LLM. Changed → LLM vs your description. An alert is a summary plus before/after screenshots.
The setup docs
Filters & descriptions
How to write a brief the LLM can actually judge — with examples that work and ones that do not.
Read the filters guide →How monitoring works
Adaptive cadence, hashing, the LLM pass, and what an alert contains.
How it works →Quickstart
Paste a URL, write the description, pick a channel, and see the first check.
Open the quickstart →What a good setup looks like in practice
Watch HubSpot's pricing page with "alert when plan prices change; ignore cookie banners and layout tweaks." The cookie banner never hits the channel. "Professional went from €749/mo to €792/mo" does. Same pattern for a sitemap (new URLs), a careers page (new roles), or tenders (new RFPs). If a carousel is loud, add an ignore clause — or point the monitor at a more specific URL.
What this will not do
Pages behind a login
Not yet. Page Deltas monitors the public web only. Authenticated monitoring is on the roadmap.
Did this pixel move?
We strip nav, footer, and ads, then ask an LLM whether the change matches your description. Wrong tool for visual regression or defacement.
A legal archive
This is not a Wayback Machine. You get alerts when something you care about changes — not a permanent public record of every version.
A user-typed 2-minute poll
Cadence is adaptive; you do not type an interval. Classic diff tools still own that niche.
Frequently asked questions
- How do I start monitoring a website?
- Create a free account, paste the public URL (or a sitemap.xml), write a one-sentence description of what matters, pick a channel, and let the first check run. A new monitor is due immediately.
- Why does the description matter?
- The description is the prompt the LLM uses. Cookie banners and layout tweaks are still diffs; a good brief tells Page Deltas to ignore them and only alert when the change matches what you asked for.
- Which alert channels can I use?
- Slack, Microsoft Teams, Discord, email, and a signed webhook. Send a test after you connect a channel.
- Can I monitor pages behind a login?
- Not yet — public web only. Authenticated monitoring is on the roadmap.
- How often does Page Deltas check a page?
- You do not set an interval. An adaptive scheduler picks cadence; higher plans get priority. Check now exists when you want a run on demand. If the hash is identical, we stop before the LLM.
- Is there a free plan?
- Yes. The free plan covers 10 URLs or sitemaps, unlimited checks, AI filtering and summaries, unlimited teammates, and the same alert channels as paid. No credit card. A sitemap counts as one URL. PDFs are supported.
Author
Julien, Product Manager at Page Deltas
Start with one page
The free plan covers 10 URLs or sitemaps, unlimited checks, AI filtering and summaries, unlimited teammates, and the same alert channels as paid. No credit card. Paste the URL you already refresh by hand, write the sentence you would send a colleague, and stop babysitting the page.