AI site builders turn a prompt into a working website in minutes. But what does a search engine see when it arrives at one? We looked at 1,978 websites made with 31 AI builders, from Lovable, Base44 and Manus to v0, Gamma and B12, and compared them with 668 popular websites. Every number below comes from our own scans on 14 October 2026.
The short version:
- Two in three AI-built sites (65%) send a page with almost no text. Their words appear only after the browser runs the site’s scripts. Among popular sites, one in nine (11%) does.
- It depends on the kind of builder. App builders send near-empty pages: Lovable 74%, Manus 85%, v0 83%, Google AI Studio 100%. Website builders send real pages: B12 0%, Landingsite.ai 8%, Gamma 12%.
- Almost none are popular yet. One of the 1,978 is among the million most visited sites in any public ranking we use.
- Few carry warning signs. 8 of 1,978 (0.4%) were blocked by a public security filter or showed signs of phishing.
What we checked
The sites are those whose newest full scan found clear traces of an AI builder, the level our AI Website Detector calls High. Most of them came from public lists of addresses on builders’ own hosting; the rest from our labelled test set and from sites people scanned. Each was scanned once, politely, with robots.txt respected.
For comparison, we took every site in our database that a public ranking (Tranco, the Chrome UX Report or the Majestic Million) places among the top million, and whose scan found no AI traces: 668 sites we could read.
We read the home page as it arrives from the server, before any script runs. We count a page as drawn by scripts when that first answer holds fewer than 200 characters of readable text: the rest of the page exists only once a browser has run its code.
Two in three arrive almost empty
| Builder | Sites we could read | Drawn by scripts |
|---|---|---|
| Lovable | 1,042 | 74% |
| Base44 | 339 | 41% |
| Manus | 154 | 85% |
| v0 | 47 | 83% |
| Rocket | 43 | 63% |
| B12 | 38 | 0% |
| Firebase Studio | 34 | 44% |
| Gamma | 33 | 12% |
| Google AI Studio | 27 | 100% |
| Landingsite.ai | 24 | 8% |
| Atoms | 20 | 100% |
| Emergent | 20 | 100% |
| All 31 | 1,935 | 65% |
| Popular sites | 668 | 11% |
The split follows what each tool is for. App builders such as Lovable, v0 and Google AI Studio write single-page apps: the server sends a shell, and the browser builds everything inside it. Website builders such as B12, Landingsite.ai and Gamma send the finished page. Small samples (fewer than 50 sites) move a lot with a few sites, so read those rows as a direction, not a precise share.
Why it matters for search
Google can read these pages, later. Googlebot fetches a page, then queues it for rendering in a browser before indexing what the scripts produce. Google’s own guide still recommends sending the content in the page itself, because it is faster for users and crawlers “and not all bots can run JavaScript” (JavaScript SEO basics, Google Search Central, updated March 2026).
AI crawlers mostly can’t. A study of crawler traffic by Vercel and MERJ found that the crawlers behind ChatGPT, Claude and Perplexity fetch pages but don’t run their scripts (The rise of the AI crawler, December 2024). That data is from late 2024, and crawlers change; but if it still holds, what an AI assistant learns about most AI-built sites is little more than their title and description.
That makes the title and description count twice. 8% of the Lovable sites we checked still had no title of their own: the builder’s default, or none at all.
Almost none are popular yet
One of the 1,978 AI-built sites is among the top million of the Chrome UX Report, Tranco or the Majestic Million. The Chrome UX Report ranks sites under their own addresses, subdomains included, so a busy .lovable.app site would show up there. AI-built sites are young, often small, and many are prototypes; and a site that grows tends to move to its own domain, where our sample sees fewer of them.
What Lovable sites are built with
Lovable is the largest group, 1,048 sites. Almost all of them use Tailwind CSS (99%) and Vite (86%), and most React (71%): the stack nearly every Lovable project shares. A third (32%) connect a Supabase database. Only 8% load an analytics or tag-manager tool we recognise on their home page. Live numbers, and every example, are on websites made with Lovable.
Few carry warning signs
AI builders are abused for phishing: Proofpoint reported tens of thousands of malicious Lovable addresses in email each month since February 2025 (Cybercriminals abuse AI website creation app for phishing, August 2025). In our sample, 8 of 1,978 sites (0.4%) were blocked by a public security filter, named a brand that isn’t theirs in their address, or sent visitors’ data to a chat bot. Phishing pages live for days and a public index favours pages that stay up, so this says that most AI-built sites people keep online are ordinary, not that abuse is rare.
What this doesn’t tell you
- A sample, not a census. Most sites come from builders’ own hosting, so sites on their own domains are fewer here than in the world.
- The home page only. A site can send its home page as a shell and its other pages in full, or the reverse.
- Recognised tools only. “No analytics” means no tool we recognise on the home page; some load later, or run on the server.
- One day. Builders change their output; we’ll run these numbers again.
Check your own site
If you built a site with an AI builder, the full scan shows whether its page arrives drawn by scripts, what it is built with, and the title and description search engines and AI assistants will read. To see what others build, browse websites made with AI builders.