---
title: "CDN Uptime & Reliability"
description: "30-day and 90-day uptime rankings for the largest CDN providers. Independent measurement, no provider affiliation."
url: https://uptimeproject.org/category/cdn/
built: 2026-11-06T12:58:15.145Z
---

# CDN Reliability Rankings

All 5 CDN providers ranked by 30-day availability. Independent measurement, no provider affiliation. Refreshed on every page load.

CDN services ranked by 30-day availability
| Rank | Provider | Status | 7d | 30d availability | 30d downtime | 90d |
| --- | --- | --- | --- | --- | --- | --- |
| Tied for 1 | [AWS CloudFront](https://uptimeproject.org/service/aws-cloudfront/) | Operational | 100.00% | 100.00% | 0 min | 100.00% |
| Tied for 1 | [Bunny.net (BunnyCDN)](https://uptimeproject.org/service/bunnycdn/) | Operational | 100.00% | 100.00% | 0 min | 100.00% |
| Tied for 1 | [Cloudflare CDN](https://uptimeproject.org/service/cloudflare-cdn/) | Operational | 100.00% | 100.00% | 0 min | 100.00% |
| Tied for 1 | [Fastly](https://uptimeproject.org/service/fastly/) | Operational | 100.00% | 100.00% | 0 min | 100.00% |
| Tied for 1 | [KeyCDN](https://uptimeproject.org/service/keycdn/) | Operational | 100.00% | 100.00% | 0 min | 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](https://uptimeproject.org/methodology/) .