Cloudflare vs Fastly.

Live

Over the last 30 days CheckUpstream measured both at 100.000% availability (n=2824 and n=2825). Over the last 30 days Cloudflare posted 60 incidents and Fastly posted 28.

Cloudflare

Degraded

30d measured availability

100.000%

Incidents posted (30d)

30 days agotoday

Fastly

Partial Outage

30d measured availability

100.000%

Incidents posted (30d)

30 days agotoday

Disclosure by window

Share of each window with no impact declared, for Cloudflare and Fastly, across five time windows
Window	Cloudflare	Fastly
7d	77.703%	98.201%
30d	76.008%	94.530%
90d	75.393%	97.847%
180d	75.591%	92.432%
1y	87.963%	96.268%

Share of each window in which the vendor declared no customer impact, from their own status posts. A higher figure means fewer or shorter declared incidents — it is not a measurement of availability, and it does not make one vendor more reliable than the other. The measured availability figures are in the cards above, and only where we run a probe.

Time to resolve, from each vendor's own incident posts (30 days)

Median and 90th-percentile time to resolve for Cloudflare and Fastly, from their own published incidents in the last 30 days
Measure	Cloudflare	Fastly
Median	4h 8m	36m
Slowest 10%	1d	5h 8m
Incidents measured	58	26

Time from each vendor's own incident start to their own resolution, over the last 30 days. It describes how long each takes to close an incident they have acknowledged. The incident counts are the sample size, not a score — vendors publish at very different granularities, and one that files a notice per affected region will always show more.

Cloudflare: recent incidents (30d)

Full scorecard →

Cloudflare Access one-time PIN emails blocked by certain email security gateways, including Proofpoint
Minor
Aug 31, 20:16 UTC · resolved in 1h 53m · Resolved
HTTP/3 issue affecting R2 custom domains
Minor
Aug 31, 18:47 UTC · in progress · Investigating
Cloudflare Access bypass IP service experiencing availability issues
Minor
Aug 31, 11:40 UTC · resolved in 3h 20m · Resolved
Cloudflare Access bypass IP service experiencing availability issues
Major
Aug 31, 11:40 UTC · resolved in 9m · Resolved
Workers KV experiencing elevated error rates in Western Europe Region
Minor
Aug 31, 11:01 UTC · resolved in 4h 8m · Resolved

Show 55 older incidents ↓

Fastly: recent incidents (30d)

Full scorecard →

Elevated Errors for Manila (MNL)
Major
Sep 1, 06:13 UTC · in progress · Investigating
Elevated Errors for Manila (MNL)
Major
Sep 1, 06:13 UTC · in progress · Investigating
McAllen (MFE) Rerouted Traffic
Major
Aug 29, 03:45 UTC · resolved in 1h 5m · Resolved
McAllen (MFE) Rerouted Traffic
Minor
Aug 29, 03:45 UTC · resolved in 20m · Resolved
Portland (PDX) Rerouted Traffic
Major
Aug 26, 07:00 UTC · resolved in 1h 55m · Resolved

Show 23 older incidents ↓

Portland (PDX) Rerouted Traffic
Minor
Aug 26, 07:00 UTC · resolved in 1h 50m · Resolved
Performance Issues with Dashboard Data
Major
Aug 24, 15:20 UTC · resolved in 1d 9h · Resolved
Performance Issues with Dashboard Data
Minor
Aug 24, 15:20 UTC · resolved in 20m · Resolved
Elevated Errors for Chicago (CHI)
Minor
Aug 22, 04:06 UTC · resolved in 9m · Resolved
Elevated Errors for Chicago (CHI)
Major
Aug 22, 04:04 UTC · resolved in 24m · Resolved
Elevated Errors for Chicago (CHI)
Minor
Aug 22, 04:04 UTC · resolved in 11m · Resolved
Impacted performance to our Content Delivery (CDN)
Minor
Aug 22, 03:15 UTC · resolved in 20m · Resolved
Impacted performance to our Content Delivery (CDN)
Minor
Aug 21, 00:33 UTC · resolved in 28m · Resolved
Impacted performance to our Content Delivery (CDN)
Major
Aug 20, 23:32 UTC · resolved in 29m · Resolved
Impacted performance to our Content Delivery (CDN)
Minor
Aug 20, 22:33 UTC · resolved in 37m · Resolved
Impacted performance to our Content Delivery (CDN)
Major
Aug 20, 22:33 UTC · resolved in 36m · Investigating
Honolulu (HNL) Rerouted Traffic
Minor
Aug 20, 21:24 UTC · resolved in 46m · Resolved
Honolulu (HNL) Rerouted Traffic
Major
Aug 20, 21:24 UTC · resolved in 46m · Resolved
Reduced cache performance for Compute services
Major
Aug 20, 06:21 UTC · resolved in 1h 50m · Investigating
CDN Global Performance Impact
Major
Aug 19, 22:09 UTC · resolved in 1m · Resolved
Ambala (QAA) Rerouted Traffic
Major
Aug 19, 18:48 UTC · resolved in 1h 52m · Resolved
Ambala (QAA) Rerouted Traffic
Minor
Aug 19, 18:48 UTC · resolved in 32m · Resolved
CDN Global Performance Impact
Major
Aug 19, 17:02 UTC · resolved in 6h 48m · Resolved
CDN Global Performance Impact
Minor
Aug 19, 17:02 UTC · resolved in 5h 8m · Resolved
Retrospective: Impacted Performance for Next-Gen WAF (NGWAF) Request Logs and Telemetry Data
Major
Aug 13, 06:01 UTC · resolved in 0m · Resolved
Elevated Errors for API & Configuration Management
Major
Aug 11, 06:20 UTC · resolved in 3h 40m · Resolved
Elevated Errors for API & Configuration Management
Major
Aug 11, 06:20 UTC · resolved in 2h 10m · Resolved
Retrospective: Impacted Performance in Frankfurt (FRA), Ashburn (IAD), Object Storage
Major
Aug 10, 19:50 UTC · resolved in 19m · Resolved

Published SLA terms

Cloudflare publishes 1 product-level uptime commitment with service-credit tiers. When a commitment is missed, credits are owed, but only if you file inside the window.

Cloudflare SLA terms →

Vercel vs Cloudflare

Cloudflare vs Fastly.

Disclosure by window

Time to resolve, from each vendor's own incident posts (30 days)

Cloudflare: recent incidents (30d)

Cloudflare Access one-time PIN emails blocked by certain email security gateways, including Proofpoint

HTTP/3 issue affecting R2 custom domains

Cloudflare Access bypass IP service experiencing availability issues

Cloudflare Access bypass IP service experiencing availability issues

Workers KV experiencing elevated error rates in Western Europe Region

Increased HTTP 5xx Errors in Singapore

Workers Builds are Degraded

Incorrect geo location for some Cloudflare WARP users

Turnstile Challenge Issues

Turnstile Challenge Issues

Durable Objects and Downstream Service Errors

Cloudflare MCP Portal tool invocation logging instability

Increased Latency

Increased HTTP 5xx Errors in Chicago

DO and D1 are degraded in Hong Kong and Singapore

Elevated R2 errors in Dubai (DXB)

Zero Trust Client Posture Failures

Increased Errors for Durable Objects in the Hong Kong region

Network performance issue in Mumbai

Cloudflare Access Browser-based RDP Issue

Elevated Errors R2 and Durable Objects

Durable Objects and Downstream Service Errors

Increased Errors for Durable Objects and Downstream Services in Indonesia

Network Performance Issues in India

Network performance issue in Singapore

Elevated error rates in Chicago (ORD) region.

Workers AI GLM 5.2 is unavailable

Increased Errors for Durable Objects in the Hong Kong region

Lists Service Degraded

Network Performance Issues in Phoenix, Los Angeles

Cloudflare Dashboard Issues

Cloudflare Lists Bulk Actions failing

Increased Errors for Durable Objects

Durable Objects and Cloudflare Workflows availability drop

Increased network congestion in the Eastern US

Increased HTTP 5xx Errors in Kuwait, Bangkok, Jakarta and Dammam

Network Performance Issues in Querétaro, Mexico

Increased 503s when making changes to Cloudflare dash and API for Magic Transit and Cloudflare WAN and CF1 Appliance

Increased errors for Workers KV requests

MCP Server Portal experiencing intermittent issues with user authentication

Cloudflare Workers AI errors with Specific models

Email Security delivery impacted by Spamhaus listing

Cloudflare Analytics Delays

Elevated Errors in Fuzhou and Foshan

Issues with 1.1.1.1 public resolver in Tel Aviv (TLV)

Connectivity issues affecting access to some website from certain networks in Egypt

Network Performance Issues in Istanbul

R2 Availability Issues

Worker's Observarbility Issues

Network Performance Issues in Chicago (ORD)

Web Analytics Configuration issues

Cloudflare Gateway Email List policy issues

Cloudflare Workers and Pages Assets Uploads issues

Managed Challenge Issues for China Network

Elevated R2 error rates and latency

502 errors observed around Singapore, Jakarta and Bangkok

Cloudflare Workers deployment Issues

Cloudflare Workers Runtime API issues

Cloudflare Workers build failures

Cloudflare Dedicated Egress in London

Fastly: recent incidents (30d)

Elevated Errors for Manila (MNL)

Elevated Errors for Manila (MNL)

McAllen (MFE) Rerouted Traffic

McAllen (MFE) Rerouted Traffic

Portland (PDX) Rerouted Traffic

Portland (PDX) Rerouted Traffic

Performance Issues with Dashboard Data

Performance Issues with Dashboard Data

Elevated Errors for Chicago (CHI)

Elevated Errors for Chicago (CHI)

Elevated Errors for Chicago (CHI)

Impacted performance to our Content Delivery (CDN)

Impacted performance to our Content Delivery (CDN)

Impacted performance to our Content Delivery (CDN)

Impacted performance to our Content Delivery (CDN)