How we rate & score websites

Every reliability score on TheSiteStatus is built from data we measure ourselves, blended with reports from real visitors. Here is exactly how it works — no black boxes.

1. What we measure

Automated probes record uptime, HTTP status, and response time around the clock. This is the objective half of every score.

2. What you report

Visitors rate reliability and flag problems. These crowd-sourced signals surface outages our probes might not see from a single vantage point.

The reliability score (0–100)

The headline score combines three measured signals over the trailing 12 months. Each contributes a maximum number of points:

Signal	Max points	How it's earned
Uptime	60	Scaled non-linearly across 90–100%, so each extra "nine" (99.9 vs 99.0) is worth far more.
Response time	20	Faster average server response earns more points (see table below).
Stability	20	Full marks with zero incidents, decaying gradually as outages accumulate.

If a signal has no data yet (common for a freshly-added site), it is simply dropped and the remaining weights are re-normalised — so a new site is never unfairly penalised. Instead, the score carries a confidence level:

High — uptime + response + stability Medium — uptime + response Low — only one signal None — not enough data

Letter grades

The 0–100 score maps to an at-a-glance letter grade:

A+ 97–100

A 93–96

A- 90–92

B+ 85–89

B 80–84

B- 75–79

C+ 70–74

C 60–69

D 50–59

F below 50

Response-time scale

Average server response (lower is better) is scored on this scale:

Average response	Rating	Points
Under 200 ms	Excellent	20
200–399 ms	Fast	18
400–699 ms	Good	15
700–1199 ms	Average	11
1.2–2 s	Slow	7
2–3.5 s	Slow	4
Over 3.5 s	Very slow	2

Community star ratings & problem reports

Anyone can rate a site from 1 to 5 stars. We store every rating and display the running average alongside the total number of ratings, so you can judge how much weight to give it. A site's star rating is independent of its measured reliability score — it captures lived experience that raw probes can miss.

Visitors can also flag a specific problem from a fixed set:

Not Loading Login Issues Very Slow Error Messages Other

When enough independent reports arrive in a short window, we raise a crowd-sourced outage signal — even if our automated probe still sees the site as up. This is how regional or account-specific outages get caught.

Spotted something off?

Rate a site or report a problem directly on its status page — your input updates the score in real time.

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