Looking at both for protecting a live video stream. My main thing is keeping latency super low.
Everyone says Cloudflare's free tier is generous. But I've heard Fastly's edge compute can be faster for video. Is that still true with Cloudflare's recent updates?
Need the WAF to stop basic attacks without adding milliseconds. Hate the idea of paying for a ton of features I won't use. What's the real price to get low-latency WAF on each? Any hidden costs with either?
I'm an integration architect at a mid-market OTT streaming platform, managing the API and CDN layer for our live event broadcasts. We currently run Fastly's WAF and Compute@Edge in production, handling several major live streams concurrently.
* **Latency Impact & Request Path:** Fastly's main advantage is that its WAF runs on the same edge servers as its cache. For a cacheable live stream (e.g., segment files), the WAF check occurs *before* the cache lookup. A clean request hits the cache directly, adding typically 1-3ms for TLS and WAF inspection on a cache hit. Cloudflare's WAF, in my testing last year, runs in a separate layer; even on a cache hit, traffic routes through their WAF fleet, adding a consistent but small network hop. For us, Fastly's integrated path shaved a consistent 8-12ms off the 95th percentile latency compared to our Cloudflare PoC.
* **Real Pricing & The "Free" Trap:** Cloudflare's free WAF is compelling for basic rulesets. However, for low-latency streaming, you need their "Pro" tier ($20/month) at minimum to customize rules and thresholds, otherwise you risk false positives blocking legitimate viewer requests. Fastly has no free tier; its WAF is bundled with its overall service. You pay for usage (requests/GB). For our scale, Fastly costs about $3,500/month, but a comparable Cloudflare Enterprise setup (necessary for advanced rate limiting and real-time logs) was quoted at roughly $2,800/month. The hidden cost with Cloudflare is that true low-latency tuning often requires an Enterprise agreement.
* **Configuration & False Positive Management:** Both can stop basic attacks. Fastly's WAF rules are applied via VCL snippets or their Compute@Edge code, giving you precise control over the request pipeline - you can conditionally apply complex rules only to certain origins or paths. Cloudflare's dashboard is more unified, but tailoring rules without impacting performance sometimes requires using their Transform Rules or Page Rules, which are separate config layers. In my experience, Cloudflare's managed rulesets required more fine-tuning to avoid blocking legitimate video player clients.
* **Observability & Debugging:** When latency spikes, you need instant visibility. Fastly's real-time log streaming to an endpoint (like S3 or Datadog) is built-in and fast. You can see WAF actions per request with minimal delay. Cloudflare's equivalent, Logpush, is an Enterprise-only feature. Without it, you're relying on sampled logs in the dashboard, which isn't sufficient for diagnosing issues during a major live event.
My pick is Fastly, specifically if your live stream uses cacheable HTTP segments (HLS/DASH) and you require the absolute lowest, most consistent latency where the WAF is always on. If your budget is severely constrained and your stream can tolerate a slightly higher, more variable latency baseline, Cloudflare Pro is a valid starting point. To make a clean call, tell us your expected peak concurrent viewer count and whether your video engineers are comfortable writing VCL/JavaScript for the edge or insist on a GUI-only configuration.
Single source of truth is a myth.
The "free trap" is real, but you're underselling it. Cloudflare Pro at $20 is still a rounding error compared to Fastly's bandwidth markup. Their free tier blocks the same OWASP top ten, and for a basic stream that's often enough.
Your latency point about the separate WAF layer is fair, but only matters if you're already pushing single-digit millisecond budgets. Most streams aren't. That 8-12ms you saved wouldn't even register on our dashboards for 95% of events.
The hidden cost with Fastly isn't the WAF bundle, it's getting locked into their ecosystem. Try pulling your config out sometime.
CRM is a necessary evil
You're right to focus on the real price for low latency. Fastly's pricing is bandwidth-based plus a WAF add-on, so if your stream volume is high, it gets expensive fast.
Cloudflare's Pro tier at $20/month is definitely the simpler, cheaper path for "basic attacks without adding milliseconds." Their recent updates did improve things, but that separate WAF layer user60 mentioned is still a tiny hop.
Honestly, unless you're serving esports or financial data streams, that difference won't matter. The hidden cost is over-engineering. Start with Cloudflare Pro, see if you ever even notice the latency on your dashboard. If not, you've saved a ton of complexity and cash.
Totally get the worry about paying for features you won't use, that's where I get overwhelmed too. The Cloudflare Pro tier at $20 feels like the obvious starting point just to see if you even notice any latency hit. You can literally test it while your stream is live.
But I'm curious, when you say "super low" latency, what's your actual threshold? Is it like under 100ms? Because if it is, I wonder if even trying Fastly is worth the headache unless you're already hitting that limit with Cloudflare.