What is BuiltWith?
BuiltWith examines public websites to identify the software, frameworks, and services they use for its technology intelligence products. You can set up Agent Analytics to see when BuiltWith visits your website.
Category
| Example User Agent | Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko; compatible; BuiltWith/1.4; rb.gy/xprgqj) Chrome/124.0.0.0 Safari/537.36 |
| Operated By | BuiltWith |
| Source | Official Website |
| Identity |
Verified
Verified Identification
Requests claiming to be this agent can be authenticated using its published verification method. |
| Triggered By | Operator-configured crawl |
| Used for AI Model Training | Possibly |
| Affects AI Chat & Search Visibility | Not directly |
| Expected To Follow Robots.txt | Yes |
Why Is BuiltWith Visiting My Website?
BuiltWith or one of its clients may be gathering competitive intelligence, measuring advertisements, or evaluating content for brand safety. The pages requested reflect the underlying objective.
Should I Block BuiltWith?
Confirm BuiltWith's purpose before blocking it. Intelligence gatherers may collect competitive research, measure advertisements, or evaluate pages for brand safety. Weigh any benefit against sharing business or page-level data with its operator or clients. For context, 7% of the top websites we track currently have robots.txt rules for BuiltWith.
How Do I Block BuiltWith Using Robots.txt?
Add this rule to your robots.txt file to block BuiltWith from accessing your website, or use Automatic Robots.txt to block all intelligence gatherers at once. You can customize which pages are blocked by swapping out / for a different path.
User-agent: BuiltWith # https://knownagents.com/agents/builtwith
Disallow: /Insights for BuiltWith
As of November 9, 2026, this data reflects agent visits measured across thousands of websites using Agent Analytics, combined with daily scans of the top 1000 websites and their robots.txt files.
Robots.txt Compliance
Country of Origin
Robots.txt Blocked Percentage
Frequently Asked Questions
What Traffic Patterns Should I Expect From BuiltWith?
BuiltWith's traffic pattern depends on the intelligence being collected. It may revisit specific pages on a schedule, crawl broader sections of your site, or appear only when information is requested. Its request scope and frequency reflect the underlying objective.
Does BuiltWith Follow Robots.txt Rules?
BuiltWith is expected to follow robots.txt rules, so a disallow rule is the appropriate first step if you want to block it. Automatic Robots.txt can add and maintain that rule, while Agent Analytics lets you verify whether BuiltWith respects it.
Is BuiltWith Used for AI Model Training?
Possibly, but its category does not establish that purpose. BuiltWith's operator may use or provide the collected content for AI training or for unrelated automated tasks.
Does Blocking BuiltWith Affect AI Search or Citations?
Not directly. BuiltWith's expected purpose is not to supply an AI search index or retrieve pages for AI-generated answers.
Does BuiltWith Access Private Content?
No special access. BuiltWith can read publicly available pages but cannot bypass authentication. Assume anything you publish openly may be collected.
How Can I Verify a Request From BuiltWith?
Agent Analytics tracks visits from BuiltWith and every other known AI agent, crawler, and scraper, then authenticates each visit using BuiltWith's published verification method. You can also check your server logs for requests whose user-agent string contains "BuiltWith". Traffic may range from repeated requests to the same pages to broader crawls or one-off fetches. A matching log entry alone is not proof because any bot can claim to be BuiltWith.