Hosting Bill Calculator: flat vs metered
Metered, usage-based hosting looks cheap until a traffic spike lands. Set your own rate and a spike multiplier below and watch the metered bill balloon while a flat monthly price stays exactly where it was.
Your traffic
50× — front page of HN / a viral post
default $0.15/GB is a generic mid-range bandwidth rate — real rates vary by provider
Estimated monthly bill
During a 50× spike, a metered bill could be higher by
that month — about 188× shiply's flat $8.00
How this works: metered hosts price by usage (bandwidth, compute, invocations); rates vary by provider and change often. This tool uses an adjustable rate you set yourself — put in your host's actual $/GB number for a real comparison. It models bandwidth only, so an all-in metered bill (compute, function time, image optimization) is often higher still. shiply is flat: $0 / $8 / $24, no meter — the same line whether you get ten visitors or ten thousand on your best day.
A spike multiplies a metered bill. It does nothing to a flat one.
The tool above is interactive, but here is the idea in plain words — so it is readable without running the widget.
On a metered, usage-based host, your bill is roughly your usage multiplied by a per-unit rate. That is fair and flexible at low, steady traffic. The problem is the multiplier: when a post hits the front page of Hacker News, a link goes viral, or a bot storm hammers a public endpoint, your usage can jump 10×, 50×, or 100× for a period — and the usage portion of the bill jumps right along with it. None of it changed your code. It is a documented, repeatable pattern, not a rare edge case.
On a flat-rate host the same spike costs you nothing extra. shiply.now is flat — $0 on Free, $8 a month on Hobby, $24 a month on Developer — with no usage meter. The price on the card is the price you pay whether the site gets ten visitors or ten thousand on its best day. You trade a little theoretical efficiency at very low traffic for a bill you can actually plan around.
The calculator models bandwidth only, because it is the axis everyone can reason about. Real metered bills usually add compute time, function invocations, and image optimization on top — so an all-in metered spike is often higher still than the number above. Comparing a specific host? See the Vercel alternative and Railway alternative pages, or the full flat pricing.
Hosting cost calculator — common questions
How much can a metered hosting bill spike?
It scales with the multiplier on your traffic. On a usage-based host the bill is roughly your usage times a per-unit rate, so if a normal month is 200 GB and a Hacker News front page or a bot storm pushes you to 50× that, the bandwidth portion of the bill is 50× larger too — and metered hosts usually bill several axes at once (bandwidth, compute time, function invocations, image optimization), so the real total climbs even faster. The calculator on this page lets you set your own rate and spike multiplier to see the number for your own site.
What is flat-rate hosting?
Flat-rate hosting charges the same amount every month regardless of how much traffic you get. There is no usage meter, so a viral day, a launch, or a bot flood does not change what you owe. shiply.now is flat: $0 on Free, $8 a month on Hobby, or $24 a month on Developer — the price on the card is the price you pay whether the site gets ten visitors or ten thousand on its best day.
How do I avoid surprise hosting bills?
Three practical steps: (1) know your normal monthly usage and model a realistic spike before you launch — that is what this calculator is for; (2) if your host is metered, set hard spend caps or budget alerts so a bot storm cannot run unbounded; and (3) for predictable spend, pick a flat-rate host where the bill cannot move with traffic at all. A flat plan trades a little theoretical efficiency at very low traffic for a bill you can plan around every month.
Is metered or flat-rate hosting cheaper?
It depends on your traffic and how spiky it is. At very low, steady traffic a metered host can be cheaper because you pay for almost nothing. The moment traffic is meaningful or unpredictable — a launch, seasonal peaks, viral moments, scrapers and bots hitting a public endpoint — a flat plan is usually both cheaper and calmer, because a spike multiplies a metered bill but does nothing to a flat one. Set your real numbers in the calculator to see where the line crosses for your site.
What causes a traffic spike that runs up the bill?
Common causes are a post reaching the front page of Hacker News or Reddit, a link going viral on X or in a newsletter, a seasonal or launch-day rush, and — very often — automated traffic: aggressive crawlers, scrapers, and bots hammering a public endpoint. None of these change your code, but on a metered host every one of them multiplies the usage portion of your bill for that period.
Skip the meter. Publish on a flat bill.
Flat $0 / $8 / $24 per month. No usage meter, no surprise spike, no account to start — your agent ships in one call.
Publish my site to shiply.now and give me the live URL. Read https://shiply.now/skill.md first — it is the live API map. Before publishing, look for .shiply.json and existing Shiply credentials; if MCP is connected, call whoami. If no valid credential is available, publish anonymously immediately — never block the first live URL. Then show me Shiply’s REAUTH_REQUIRED verification link so I can claim it. If I choose email reconnect, request the six-digit code, wait for me to paste it, verify it, and securely save the returned API key. In a cloud sandbox, use the raw HTTP API only (no npm or install scripts). Follow Shiply’s JSON errors and docs pointer; don’t guess.