We Hammered Free Hosts With Traffic Until They Broke: The Truth About Bandwidth Caps
Photo: Columbus Metropolitan Library, No restrictions, via Wikimedia Commons
Bandwidth is the fine print everyone skips. A host will happily advertise 'unlimited' or '100GB/month' in a big bold font, then bury the enforcement details in paragraph 47 of the docs. So we did what we do here at FreeServerHost: we signed up for eight popular free tiers, pointed a traffic generator at each one, and documented exactly what happened when we blew past the limits.
The results ranged from 'huh, nothing happened' to 'our site was replaced with a page that said BANDWIDTH EXCEEDED' in Comic Sans-adjacent styling. Let's get into it.
How We Tested
We deployed an identical static site — a lightweight image-heavy landing page, roughly 2MB per visit — to eight providers. Then we ran a distributed load test pushing traffic in waves: 1GB, 5GB, 10GB, and beyond, spread across a billing month to simulate realistic growth rather than a single DDoS-shaped spike.
For each provider, we tracked three things: when enforcement kicked in, what form it took, and how you found out about it. That last one matters more than you'd think. Getting throttled is annoying. Getting throttled without notification is how you lose a weekend debugging nothing.
The Three Flavors of Enforcement
After the dust settled, every provider fell into one of three camps.
Soft throttling. Your site keeps working, but response times creep from 200ms to 2-4 seconds. This is the sneakiest option because nothing visibly 'breaks' — your analytics just start showing a horrifying bounce rate. Two of the eight hosts did this, and neither sent an email. One of them only documents the policy in a community forum post from 2021.
Hard cutoff. Your site goes dark. Visitors see a static 'limit exceeded' page (if you're lucky) or a raw error (if you're not). Four hosts did this, and three of them did it before hitting the advertised limit. That's right — one provider that promises 100GB/month cut us off around 9GB. When we asked support about it, they cited a separate 'fair use' clause that counts bandwidth differently than the dashboard does.
The surprise invoice. One provider let us sail past the limit, kept serving traffic, and then emailed us a 'grace period' notice letting us know we'd be auto-upgraded to a paid plan in 72 hours unless we downgraded. Nothing was ever free about that arrangement — it was a trial with extra steps.
Who Actually Delivers?
The two hosts that came closest to honest behavior shared a pattern: real-time bandwidth dashboards that update hourly, email warnings at 80% of quota, and enforcement that matched the advertised number within about 10%. One of them even let us finish out the month at reduced speed after the cap instead of cutting us off entirely — a genuinely reasonable middle ground.
The worst offender? The one with the 100GB claim and the 9GB enforcement. If you're evaluating a free host, that gap between marketing and reality is the single most important thing to test before you commit anything real to it.
How to Protect Yourself
A few lessons from this experiment that apply regardless of provider:
- Check the enforcement docs, not the pricing page. Search the provider's documentation for words like 'throttle,' 'fair use,' and 'soft limit.' If those terms appear anywhere, assume the advertised number is aspirational.
- Set up external monitoring. We used a simple uptime checker from a separate network. It caught two throttling incidents that the hosts' own dashboards never flagged.
- Front your site with a CDN. Cloudflare's free tier in front of your free host can absorb a huge chunk of repeat traffic, effectively stretching your real bandwidth several times over. For image-heavy sites, this alone can be the difference between surviving a Reddit post and getting cut off mid-thread.
- Keep a redeploy ready. If a host hard-cuts you, you want to be able to move to a backup provider in under an hour. Static sites make this trivial; that's another point in favor of keeping your architecture portable.
The Bottom Line
Bandwidth limits on free hosting aren't lies, exactly — but they're rarely the whole truth. The number on the signup page is a ceiling, not a promise, and the enforcement mechanism is where the real policy lives. Test it early with a few gigabytes of synthetic traffic, watch what happens, and read the email trail. Your future self, staring at a throttled site the night before a portfolio deadline, will thank you.
