“Can AI just build my website?” is the question every business owner is now asking. The honest answer: AI changes the cost and the timeline dramatically — but not in the way the hype suggests. Here is what building a website with AI really costs, how long it takes, and where it still needs a human.
What AI actually changes
AI doesn't replace the website — it collapses the expensive parts of making one. Discovery, copywriting drafts, layout exploration, image production, and code scaffolding that used to eat weeks of agency hours now happen in hours. What's left is direction, taste, and the parts that require judgment.
- Drafting and translating copy across languages in one pass.
- Generating and refining imagery instead of stock-photo licensing.
- Scaffolding clean, fast, accessible code instead of a heavy template.
- Iterating layouts in real time instead of static mockup rounds.
Cost: what a modern site really runs
A typical corporate site from a traditional agency runs ¥3,000,000–8,000,000. With an AI-native studio you can get the same or higher quality for roughly ¥600,000–1,500,000 — an average 60–80% reduction. The savings aren't from cutting scope; they're from cutting the hours AI now absorbs.
Timeline: 14 days, not 3 months
The agency calendar — kickoff, mockups, revision rounds, dev handoff — is where months disappear. An AI-native build compresses that to a focused two-week sprint: a working, on-brand site you can review live, not a slideshow of static comps.
Where AI doesn't replace humans
Strategy, brand voice, and craft still decide whether a site converts. AI gets you to a strong draft in record time; a human turns that draft into something that actually sounds like you and sells. The studios winning right now pair AI speed with human direction — not one or the other.