Free monitoring — 1 URL, no credit card

Know when any website changes

Enter a URL. We'll screenshot it daily, compare it to yesterday, and email you when something changes. Visual diff + plain-English summary.

You're on the list!

We'll email you when your monitor is live. Usually within 24 hours.

What people monitor

💰

Competitor pricing pages

Know the moment a competitor changes their pricing, adds a new tier, or adjusts feature gates. 72% of B2B SaaS companies changed pricing in 2025.

📋

Terms of service & legal

Compliance teams monitor terms, privacy policies, and regulatory pages. Get alerted to changes before they affect your agreements.

🛍️

Product & feature pages

Track when competitors launch features, update product descriptions, or change positioning. Stay ahead without checking manually.

📊

Job boards & org charts

Monitor competitor hiring pages to understand where they're investing. New "AI Engineer" listings tell you more than any press release.

How it works

Give us a URL

Any public webpage. Pricing page, product page, legal terms, job board — anything you'd normally check by hand.

We screenshot it daily

Every 24 hours, we capture a full-page screenshot and compare it to the previous version using pixel-level visual diffing.

You get an email when it changes

Visual diff highlighting exactly what changed, plus a plain-English AI summary: "Pricing for Pro tier increased from $49 to $59/mo."

Frequently asked questions

Is there really a free tier?

Yes. Monitor 1 URL with daily checks and email alerts. No credit card, no trial period, no catch. We want you to see the value before you pay for more URLs.

How is this different from Visualping or ChangeTower?

DiffGoblin focuses on visual diffs (screenshot-based), not HTML diffs. This means we catch changes that text-based monitors miss: layout shifts, image swaps, design changes, and dynamic content. We also include AI-powered change summaries so you don't have to squint at a diff image.

What kind of pages can I monitor?

Any publicly accessible webpage. Pricing pages, product pages, terms of service, job boards, landing pages, regulatory filings — if it has a URL and loads in a browser, we can monitor it.

How quickly will I get alerts?

We check monitored URLs once every 24 hours. When a change is detected, you'll receive an email within minutes. Paid plans include more frequent checks (every 6 hours or hourly).

Can I monitor pages behind a login?

Not yet. We're working on authenticated monitoring for paid plans. For now, we support any publicly accessible URL.