CDN (Content Delivery Network) costs are confusing because the pricing models differ across providers and the bandwidth math isn't intuitive. A WordPress site that thinks it costs $0/month for CDN might actually be paying for it in slower performance or in surprise overage charges that haven't been triggered yet.

The honest cost picture across the major CDN providers in 2026 reveals where the real costs are, where the free tiers genuinely cover serious use, and where you should expect to pay.

The pricing models

CDNs charge based on some combination of: bandwidth (how much data you serve), requests (how many files you serve), edge locations (where in the world you serve from), features (image optimization, video streaming, WAF, security analytics).

The simplest pricing model is per-GB bandwidth. Cloudflare's paid tiers charge $0 per GB but bundle bandwidth with feature tiers. BunnyCDN charges per GB at $0.005-$0.05 depending on the network and region. KeyCDN is similar to Bunny.

The more complex pricing models stack bandwidth, requests, and feature fees. Akamai, Fastly, AWS CloudFront have multiple cost dimensions that add up to monthly bills.

The free tier reality

Cloudflare's free tier is the most generous free CDN offering. The free tier includes: unlimited bandwidth, global edge network, basic DDoS protection, free SSL certificate, basic page rules.

For most WordPress sites under 1 million monthly visits, Cloudflare's free tier is sufficient. The CDN behavior produces real performance improvement and the cost is genuinely zero.

The free tier's gaps: minimal image optimization (basic Polish on paid tiers), limited WAF (full WAF on paid tiers), no live chat support (community forum only on free).

For sites that want image optimization, advanced security, or paid support, Cloudflare's paid tiers start at $20/month (Pro) or $200/month (Business).

The actual cost for different site sizes

A typical content site serving 100,000 monthly visits with average page weight of 1.5MB serves: 100,000 × 1.5MB = 150GB/month of bandwidth. CDN cost at $0.01/GB averages $1.50/month for the CDN bandwidth.

The same site on Cloudflare's free tier pays $0 because Cloudflare doesn't charge per-GB on the free tier.

The same site on BunnyCDN pays roughly $1.50/month based on the GB consumed.

The same site on Cloudflare Pro pays $20/month for the Pro tier features, regardless of bandwidth.

For most sites at this scale, the math says: use Cloudflare free if the included features cover your needs; use BunnyCDN if you want metered pricing and specific Bunny features; use Cloudflare Pro if you want the Pro features.

The cost at scale

A high-traffic site serving 10 million monthly visits with 1.5MB average page weight serves 15TB/month. At $0.01/GB, that's $150/month in raw bandwidth.

At this scale, Cloudflare's free tier still covers the bandwidth at $0, but the site likely needs paid features (WAF rules, advanced caching, performance analytics) that aren't on free. Cloudflare Pro or Business is appropriate.

BunnyCDN at $0.01/GB = $150/month for the bandwidth. Cloudflare Business is $200/month flat. The cost comparison gets closer at this scale.

For enterprise sites (100+ million monthly visits), the pricing depends on negotiated rates with the CDN provider. The published rates aren't what large customers pay.

The hidden costs to watch for

Egress fees from your origin host to the CDN. Some hosts (AWS especially) charge for outbound bandwidth from their network. The CDN saves end-user bandwidth costs but the origin-to-CDN bandwidth has its own cost.

Most quality WordPress hosts include reasonable bandwidth without egress charges. Verify before assuming.

Per-request charges. Some CDNs charge per HTTP request in addition to per-GB bandwidth. For sites with many small files (typical WordPress sites with many images), the request count can be significant.

Cloudflare doesn't charge per-request on its standard plans. AWS CloudFront does charge per-request, which can add up.

Image transformation charges. Image CDNs (Cloudinary, ImageKit, Imgix) charge for image transformations on top of bandwidth. For sites that use image transformation extensively (responsive resizing, format conversion), the transformation cost can exceed the bandwidth cost.

If you're using a generic CDN with separate image optimization (handled by a WordPress plugin like ShortPixel), the transformation happens at upload time and the CDN just serves the optimized files. This is usually cheaper than a transforming image CDN.

The features worth paying for

Web Application Firewall (WAF): blocks common attacks before they reach your origin. For sites with significant attack traffic, the WAF is worth the paid tier upgrade.

Bot management: distinguishes legitimate bots (search engine crawlers) from malicious bots (scrapers, attack bots). Reduces origin load and blocks attacks.

Analytics: detailed traffic analytics from the CDN's vantage point. Useful for understanding actual visitor patterns.

Workers/Edge functions: ability to run code at the CDN edge. Useful for advanced caching, A/B testing, geographic content variation.

For most WordPress sites, the free tier features are sufficient. The paid features matter for specific use cases.

The honest recommendation

Start with Cloudflare's free tier. The setup takes 30 minutes; the performance improvement is real; the cost is zero.

Upgrade to Cloudflare Pro if you need image optimization, full WAF, or better analytics. The $20/month covers most enhanced needs.

Switch to BunnyCDN if you have specific feature needs Cloudflare doesn't address (specialized geographic routing, specific performance optimizations) and you want metered pricing.

Consider Cloudflare Business or enterprise tier only if your site genuinely needs the enterprise features (high-security WAF, dedicated support, advanced bot management).

For most WordPress sites, the right answer is "Cloudflare free, possibly Pro." The complex multi-CDN architectures and enterprise pricing comparisons aren't relevant.

The honest cost summary

For a typical WordPress site in 2026:

Under 100,000 monthly visits: $0/month (Cloudflare free)
100,000-1M monthly visits: $0-20/month (free or Pro depending on needs)
1M-10M monthly visits: $20-200/month (Pro to Business)
10M+ monthly visits: negotiated enterprise pricing

The marketing claim that CDN saves you money is true at scale. The marketing claim that CDN is essential at all scales is overstated; below a certain traffic level, the difference is small relative to other optimization opportunities.

WordPress And CDN Costs: What You're Actually Paying For