CDN Provider Comparison

There's no single "best" CDN — only the best fit. Global and China-facing businesses follow completely different rules: China requires ICP filing, bills by bandwidth or traffic, and has denser node coverage; overseas providers bill per traffic, and vendors like Cloudflare throw in a free tier plus built-in security. This comparison breaks the major providers down by global, China-focused, and feature dimensions, then ends with scenario-based recommendations. Prices here are order-of-magnitude references; check vendor sites for current quotes.

Global CDN Providers

China-Focused CDN Providers

Feature Comparison

Filing and Billing Details for China CDNs

The two biggest differences between China CDNs and global ones are filing and billing. On filing: to accelerate mainland access with a China vendor, your domain must first complete ICP registration with MIIT — typically 1-3 weeks, so plan ahead for new sites. On billing: domestic vendors usually bill either by bandwidth peak or by traffic. Bandwidth billing suits sites with spiky, peaky traffic; traffic billing suits predictable, steady volumes. Many vendors also offer flexible options like monthly 95th-percentile billing; small sites are usually better off with per-traffic plans.

Cache Hit Rate Decides the Real Cost

The unit price is only the surface; what actually drives cost is the cache hit rate. Take 100GB of monthly traffic: at a 95% hit rate only 5GB goes back to origin; at 50% it's 50GB, doubling origin bandwidth and database pressure. To raise the hit rate, do three things: set long cache lifetimes for static assets (e.g., Cache-Control: max-age=31536000); keep dynamic endpoints out of the cache so you don't serve stale or wrong content; and use the vendor's cache-warming feature to push hot assets to edge nodes before a promotion.

Pricing Comparison Example

For a site with 100GB/month traffic:

Recommendation by Use Case

Dual-Line Strategy

For sites serving both China and global users:

                 ┌──────────────────┐
User DNS Query →│  Smart DNS (NS1/  │
                 │  Alibaba DNS)    │
                 └────────┬─────────┘
                          │
              ┌───────────┴───────────┐
              │                       │
     China User                Global User
              │                       │
     ┌────────▼────────┐   ┌─────────▼────────┐
     │ Alibaba Cloud   │   │  Cloudflare /    │
     │ CDN             │   │  Bunny CDN       │
     └─────────────────┘   └──────────────────┘

A Real Scenario: Serving Both China and Global Visitors

Say you publish a global website template on 16IDC and get visitors from both China and overseas. Overseas visitors go through Cloudflare's free plan; visitors in mainland China face a different constraint — without ICP filing, your domain can't use a China CDN for acceleration on its own domain. You have two options: file for ICP on a separate domain, or hand domestic traffic to a China cloud CDN. Plenty of people skip the filing step, then blame the CDN when domestic load times stay slow. Decide up front whether you need mainland users — that one question makes the rest of the choice much clearer.

How to Verify the CDN Is Actually Faster

Don't just eyeball "looks fast" after launch — measure it. Use curl -w to compare time-to-first-byte between the CDN hostname and a direct origin hit; use online speed tests to compare nodes in different regions; then check the CDN dashboard for cache hit rate and origin-fetch stats. A quick command-line check:

curl -s -o /dev/null -w "DNS: %{time_namelookup}s | Connect: %{time_connect}s | First byte: %{time_starttransfer}s\n" https://your-domain/static/app.css

If time-to-first-byte is clearly lower than a direct origin hit, the CDN is working; if it's about the same, you likely have a low hit rate, or traffic isn't actually reaching an edge node.

Common Mistakes

• ICP filing is a hard gate: accelerating a mainland-facing domain with a China CDN requires ICP filing first — it's a prerequisite, not an option;
• Read the free-tier limits: Cloudflare's free plan doesn't meter traffic but has limits on optimization; image-heavy sites may outgrow it;
• Don't compare unit price alone: pay-as-you-go vendors may have minimum spends or per-request billing, so low traffic can end up more expensive.

References: Cloudflare plans https://www.cloudflare.com/plans/ , Bunny pricing https://bunny.net/pricing/ , Alibaba Cloud CDN docs https://www.alibabacloud.com/help/en/cdn/