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Uptime leaderboards

Uptime by our checks, ranked by category

Every leaderboard below ranks a category of services by uptime by our checks over a trailing 90-day window, never by a survey or a vendor's own claim. These figures come from our own checks of one public endpoint per service. They are not the service's real uptime. A category ranks only once at least three of its services have a full quarter of coverage; until then it says exactly when that changes.

Categories

How these are built

Same readings as every other page on this site: a probe event only, never a user report, a public post, or the vendor's own status page. A service's uptime by our checks is the share of the window with no probe event open for it; ties break on time failing, then probe event count, then name. An event opens only when our checks fail from two or more distant regions, and events that fail our rules are retracted and listed on the corrections page. See the methodology page for the full rules, or the research section for the write-ups and quarterly reports built from the same league tables.