UptimeProject

Object Storage Reliability Rankings

All 6 Object Storage providers ranked by 30-day availability. Independent measurement, no provider affiliation. Refreshed on every page load.

Rank Provider Status 7d 30d availability 90d
#1 AWS S3 eu-west-1 Operational 100.00%
100.00%
100.00%
#2 AWS S3 us-east-1 Operational 100.00%
100.00%
100.00%
#3 Backblaze B2 Operational 100.00%
100.00%
100.00%
#4 Cloudflare R2 Operational 100.00%
100.00%
100.00%
#5 Google Cloud Storage us-central1 Operational 100.00%
100.00%
100.00%
#6 Google Cloud Storage europe-west1 Operational 100.00%
100.00%
100.00%

What does this measure?

Independent probes in five locations measure each service at per-check cadences — HTTP every minute, DNS every five minutes, TLS once an hour, storage every five to ten minutes. A minute is "up" only when a strict majority of reporting probes vote up; minutes with fewer than three reporting probes are excluded from the denominator. The 30-day availability above is the share of measured minutes flagged "up". Read the full methodology .