The internet’s reliability, ranked.
Independent reliability scores, outage history, and incident records for 355 services across 21 categories — from AWS to Zelle. Not another down-checker: this is the leaderboard.
Ranked by estimated reliability
Among the 25 services with scoring signal · estimated · 30d
Recent observed incidents
The most recently observed outages, with how each was sourced.
By category
Drill into the services people use most in a category.
ChatGPT, Claude, and other AI assistants.
View chart →AWS, Azure, GCP, and edge networks.
View chart →Retail banks, mobile banking apps.
View chart →Online play, storefronts, multiplayer.
View chart →Video and audio platforms.
View chart →Marketplaces and online retail.
View chart →Hosts, CI, source forges, VPNs.
View chart →Feeds, messaging, communities.
View chart →Not another down-checker
Ranked, not just checked
Down-checkers answer one question: is it down right now? WebsiteCharts answers the one that matters over time — how reliable is it, compared to everything else?
Browse the charts →Methodology-first
Every number is labeled — estimated, observed, or user-reported — and the scoring inputs are documented in the open. No black-box uptime claims.
Read the methodology →Need a live check right now?
For an instant, in-the-moment check of any site — with live probes and community reports — use our sister tool WebsiteDown.
Check any site on WebsiteDown →From probes to a public ranking
Three steps from raw signal to the numbers on this site.
WebsiteDown runs HTTP probes against 350+ services every 5 minutes from global infrastructure, and real users file outage reports when things break. WebsiteCharts aggregates both — we don't run our own probes.
Consecutive high-report windows are clustered into a single outage event. A gap of 30+ minutes between spikes starts a new event so isolated noise doesn't inflate the count.
Probe and report data become an estimated reliability score, and services with little recent signal are clearly labeled — we never invent uptime numbers to fill a gap.
WebsiteCharts uses aggregated probe, report, and status-page signals. Reliability scores are estimates unless otherwise labeled.
WebsiteDown probes your URLs from global infrastructure and alerts you the moment something breaks — the same signals behind this index.