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Cassian™ vs uptime monitors

Your monitor said the site was up. Nobody could check out.

Uptime monitors do one job well: they tell you when a URL stops responding. The failure that costs a store the most does not stop the URL responding. A broken payment gateway, a shipping rule that returns no rates, an app script erroring on the cart — every one of those returns a healthy 200 OK all the way to zero orders. This is what an uptime monitor sees, what it cannot see, and where the line sits.

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The dashboard was green all weekend. The orders were not.

Side by side

Every row says which tool it favours, including the 3 that favour uptime monitors. If something here is out of date, tell us and we'll correct it.

Store returns a page

Comparable
Cassian™
HTTP health check every 5 minutes, with a 30-second confirming retry before an incident opens.
Protector and above
uptime monitors
HTTP health check, typically every 1–5 minutes, often from several regions.

Number of check regions

uptime monitors
Cassian™
One region today.
uptime monitors
Several regions on most tools, so a country-specific outage is visible.

Public status page

uptime monitors
Cassian™
Not offered.
uptime monitors
Standard on most uptime monitors, often on the free tier.

Detects a broken checkout

Cassian™
Cassian™
Yes — order volume is compared against a weighted historical baseline, and a period that should have orders but has none raises a critical alert.
Every plan, including free
uptime monitors
No. A failing checkout returns a successful HTTP response, so the check passes.

Detects a pricing error

Cassian™
Cassian™
Yes — the full catalog is snapshotted daily and diffed variant by variant, with $0 and inverted sale prices treated as critical.
Every plan with a connected store
uptime monitors
No. Prices are not read.

Detects a sold-out bestseller

Cassian™
Cassian™
Yes, on the platforms that expose inventory tracking, with days-to-stockout projected from a 14-day sales velocity.
WooCommerce and BigCommerce only
uptime monitors
No. Stock levels are not read, so a sold-out product page returns the same healthy response as any other.

SSL and domain expiry

Comparable
Cassian™
Both checked daily and alerted as a countdown.
Protector and above
uptime monitors
SSL expiry is common. Domain registration expiry is less common.

SEO, content and link health

Cassian™
Cassian™
Every scan runs deterministic page checks plus link and image validation.
Every plan
uptime monitors
Not in scope.

Entry price for availability checks

uptime monitors
Cassian™
$129/month on Protector, where uptime begins.
uptime monitors
Free to roughly $10/month for comparable check intervals.

Choose uptime monitors if…

  • You want availability checking and nothing else — a dedicated uptime monitor does it well and costs very little.
  • You need checks from several countries, because your customers are spread across regions and you have had a country-specific outage before.
  • You want a public status page to point customers at during an incident.
  • You need on-call rotation and escalation policies for a team that runs a rota.

Choose Cassian™ if…

  • You have had, or fear, the incident where the site was up and the store was not selling.
  • You would rather one alert stream for orders, prices, stock, availability, links, speed and SEO than five tools that each watch a slice.
  • You want the check that reads your store's own data, not just its front door.
  • You want to start free and add availability monitoring when the store grows into it.

FAQ

Common questions

Can I use an uptime monitor and Cassian™ together?
Yes, and plenty of stores do. An uptime monitor gives you multi-region checks and a status page; Cassian™ gives you the checks that need to see inside the store. They overlap on availability and nowhere else, so running both costs a little duplication and covers more ground.
Why can't an uptime monitor detect a broken checkout?
Because a broken checkout is not an HTTP failure. The cart page loads, the checkout page loads, the payment step fails — and every request in that sequence returns a success status. The only reliable signal is that orders stopped arriving, which requires reading order data from the platform rather than requesting a URL.
Does Cassian™ check from multiple regions?
Not today — availability checks run from a single region. If multi-region checking matters to you, a dedicated uptime monitor does it better, and running one alongside Cassian™ is a sensible setup.

Keep comparing

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