How to monitor competitor website changes (5 ways)
Five ways to notice when a competitor changes its website, from a weekly manual check to a daily tracker, and the time each one costs you.
By DanPublished 4 min read
A competitor's website is the most honest thing it publishes. The pricing page shows what it charges today. The home page headline shows who it wants as a customer. The changelog shows what the team shipped last week. When one of those changes, the company has made a decision, and you can read it for free.
The hard part is noticing. Nobody announces that they rewrote their headline or moved a feature to a cheaper plan. This guide covers five ways to catch those edits, starting with the one that costs nothing.
Which pages are worth watching
Watching a whole website gives you hundreds of alerts about blog typos. Pick the few pages where a change means something:
- The pricing page. Prices, plan names, limits and which features sit in which plan.
- The home page. The headline and the first screen tell you who they sell to now.
- The changelog or release notes. What they shipped, in their own words.
- The main feature pages. New ones appear when they enter your territory.
- The comparison pages. A new "them vs you" page means your name comes up in their sales calls.
- The careers page. Five open sales roles in Germany is a plan you can read.
Five or six pages per competitor is enough. The sitemap shows you pages you didn't know existed.
Way 1: check by hand once a week
Bookmark the pages in one browser folder per competitor. Every Monday, open the folder and look. Save a PDF or a full-page screenshot of anything that matters, named with the date, so next week you have something to compare against.
It costs no money and it works for one or two competitors. It fails when you go on holiday, and it fails for small edits. Nobody spots that a seat limit went from 10 to 5 by looking at a page they saw seven days ago.
Way 2: compare saved copies
If you keep last week's copy as text, a diff tool finds the edits for you. Copy the page text into a file each week, then compare the two files in any text editor that has a compare view. Lines that changed light up.
This catches the small edits that Way 1 misses. It also takes longer, because you copy and compare every page every week whether it changed or not.
Way 3: follow what they publish
Many changelogs and blogs have an RSS feed. Add them to a feed reader and new entries come to you. Subscribe to the competitor's newsletter with a work address too. Launch emails often explain a change in more detail than the page does.
Feeds only cover what the company chose to announce. A quiet price rise never shows up in one.
Way 4: use a general page-change monitor
A page-change monitor visits a URL on a schedule and emails you when the page differs from the last visit. Most have a free tier for a handful of pages.
They do the visiting for you, which removes the Monday routine. The cost moves to your inbox. A general monitor doesn't know a cookie banner from a price, so you get an email for a rotated testimonial and another for a new footer link. After two weeks of that, most people stop opening the emails.
Way 5: use a competitor tracker
A competitor tracker does the same visits and then adds two steps. It filters out edits that carry no meaning, and it says what each remaining change means for you.
That is what Plainrival's website change tracking does. It checks each watched page once a day, keeps a text diff and a screenshot of every change, and writes a sentence or two on why the change matters and what you could do about it. It reads public pages only, respects robots.txt and sends at most one request per second to any site.
Change history
Acme CRM · 14 changes since June
Homepage headline now targets small teams
Why it matters: They are moving into your segment. A sharper line on your homepage keeps you apart.
Homepage · before and after
New page: “Acme CRM vs Fieldnote”
Why it matters: Buyers comparing you will find their version first. Check its claims and answer them on your own page.
Sitemap · new URL
What each way costs in time
Here is a worked example for a team that watches 5 competitors with 6 pages each, so 30 pages. It assumes 2 minutes to open and read a page, 4 minutes to copy and compare one, and that 3 of the 30 pages change in a normal week.
- Compare saved copies (30 pages × 4 minutes)120 minutes a week
- Check by hand (30 pages × 2 minutes)60 minutes a week
- General monitor (about 15 alerts × 2 minutes)30 minutes a week
- Competitor tracker (3 real changes × 2 minutes)6 minutes a week
A worked example from the assumptions above, not a measurement. Feeds are left out because they cover only some pages.
The general monitor's 15 alerts are a guess. The real number depends on how noisy the pages are. The pattern holds either way. Manual methods cost time for every page, and automated ones cost time only for pages that changed.
Write down what you find
Whichever way you pick, a change is only useful once someone has recorded it and decided what to do. Use one line per change with the same fields every time:
- The date you saw it
- The competitor and the page
- What it said before and what it says now
- What you will do about it, even if the answer is "nothing"
Most weeks, most changes need no action. One or two a month deserve a reply, such as a price cut you have to answer or a new comparison page with your name on it. The log is how you tell those apart later.
Which way to pick
- One or two competitors and a free hour. Check by hand and keep dated copies.
- Three or more competitors. Automate the visits. The Monday routine won't survive a busy month.
- You want fewer emails, not more. Pick a tracker that filters and explains, and read one weekly brief instead of daily alerts.
Questions
Questions about monitoring competitor websites
Is it legal to monitor a competitor's website?
Reading public pages that anyone can open in a browser is ordinary research. Stay away from pages behind a login, respect each site's robots.txt, and keep your visits slow and infrequent. This is general guidance, not legal advice.
How often should I check a competitor's website?
Once a day is plenty for pricing, home and feature pages. Most of them change a few times a year. A weekly check is fine if you do it by hand.
Can I see what a competitor's page looked like before I started watching?
Sometimes. Public web archives keep past copies of popular pages, with gaps for smaller companies. Your own dated copies are the only record you can count on.