What does Lemwatch monitor?

Lemwatch runs 20+ automated checks per site: uptime, response time, SSL/TLS expiry, domain expiry, DNS changes, sitemap health, broken links, content changes, SEO audits, mobile usability, security headers, and more.

Yes. The free tier monitors up to 5 sites. Pro is $19/month for 50 sites and Agency is $59/month for 100 sites, both with full feature access.

How is Lemwatch different from UptimeRobot or Pingdom?

Lemwatch bundles uptime, change detection, SEO audits, security scans, and a public API in one platform — features competitors charge separately for. It also includes team workspaces, white-labelled status pages, and a webhook system out of the box.

Does Lemwatch send alerts?

Yes. Lemwatch supports email, browser push, webhooks, and per-site notification routing so the right person hears about the right incident.

Is there a public API?

Yes. Pro and Agency plans get a public REST API with webhooks for sites, checks, incidents, and reports.

Visual diff thresholds explained

Tune how sensitive visual monitoring is — from tiny pixel shifts to major layout changes.

Quick answer

Sensitivity is a 0–100 slider. Lower = more sensitive (any pixel change alerts). Higher = only large layout changes alert. Default is 5% — good for most marketing pages.

What it controls

The percentage of pixels that must differ before an alert fires
Whether antialiasing and minor color shifts count as changes
How text-diff scoring is weighted against pixel-diff scoring

Where to find it in Lemwatch

Visual Monitoring → [page] → Settings → Sensitivity slider.

How to tune it

Start at the default (5%).
If you get noisy alerts on rotating banners or ads, raise to 10–15%.
If you're missing small text edits (typos, price changes), lower to 2%.
For legal/pricing pages, combine a low threshold with an ignore zone over dynamic areas.
Save. The next run uses the new threshold.

FAQ

Why did a change below my threshold still alert?

Text diff scores separately. A single character change on a page with words counts even if pixel diff is under threshold.

Can I have different thresholds per page?

Yes — thresholds are per-page, not per-site.

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