Serverless Hosting Costs: What the 85% Claim Leaves Out

Will a Serverless CMS Cut Your Site Bill by 85%? What the Claim Covers and What It Omits

By Petro Deruha , Founder & Digital Strategist

6 July 2026 4 min read Editorial policy Updated 1 October 2026

A small night-time shopfront with a glowing green edge-server cube on the window ledge, and a rack of old servers fading transparent behind it, a scale-to-zero cost metaphor

After Cloudflare launched EmDash, write-ups started telling small businesses that moving a WordPress site to a serverless CMS can cut running costs by as much as 85%. One widely shared analysis from the agency Oflight lays out a scenario in which a WordPress site costs roughly ten times what the same site would cost on EmDash. This article does one job: it looks at what that figure measures and what it leaves out. It contains no calculation of our own, because we have not priced a real site both ways. The last section lists the lines you would fill in from your own invoices.

Where serverless genuinely saves money

Traditional WordPress hosting means paying for a server that runs whether anyone visits or not. A serverless setup on Cloudflare Workers bills mostly for actual usage and scales to zero when the site is idle. For a low-traffic brochure site, a local service or a small shop, that difference is real: you stop renting a machine that sits mostly empty. Static Astro pages served from Cloudflare’s edge are also cheap to deliver, and you shed some of the costs that cling to WordPress, such as managed hosting tiers, backup add-ons and security plugins.

So the direction of the claim is plausible. A simple, low-traffic site can run for a very small monthly bill on serverless infrastructure.

What the 85% figure leaves out

The number compares hosting invoices. It does not compare what you will actually spend, and it leaves out at least four things:

It is a chosen scenario. The figures come from one write-up, rest on one traffic level and are quoted in Japanese yen for a particular market. Your bill depends on your traffic shape, your media and your database use, not on someone else’s example.
The move is not free. Migration costs developer time and carries ranking risk; lost traffic can outweigh a year of hosting savings. Where migrations lose rankings is covered in the migration checklist.
Maturity has a price. EmDash is a v0.1.0 preview with a near-empty plugin ecosystem. If you then pay a developer to rebuild the booking form, the newsletter signup or the payment flow that a WordPress plugin gave you, the hosting saving shrinks. The agent features that come with EmDash are a separate subject, treated in what an AI-native CMS changes; they do not reduce the bill.
Your own time is the other WordPress cost. For many small businesses the expensive part was never the hosting but the hours spent on updates, breakages and security worry. Serverless can reduce that. So can running fewer plugins and keeping a maintenance routine on the site you already have.

None of this says the saving is fake. It says the headline counts one line of the budget under one set of assumptions.

Lines for your own comparison

Take the last twelve months of invoices and fill in these lines for the site you run now, then estimate each one for the alternative:

Hosting plan, backups, security and caching plugin licenses.
Monthly visits and the amount of media served, since usage is what serverless bills on.
Developer hours to rebuild forms, newsletter, payments and anything else a plugin handles today.
The one-off cost of migration, including the redirect map and the post-launch crawl.
Hours per month your team spends on updates and fixes, priced at what that time is worth.

If the saving survives once the one-off and rebuild lines are in, the case exists. If hosting turns out to be a small line next to those, the question to answer first is where your customers come from. For that, send us your site address and the link to your Google Business Profile, and our small business promotion work starts from what search and Maps show today.

Sources

Cloudflare, “Introducing EmDash, the spiritual successor to WordPress,” 1 April 2026 (Matt Taylor, Matt Kane): blog.cloudflare.com
Oflight Inc., “EmDash and SMB Web Strategy” (cost-comparison scenario, in JPY): oflight.co.jp
The Register, “Cloudflare previews AI rebuild of WordPress in TypeScript”: theregister.com

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