BuiltWith
Wappalyzer
WhatRuns
Elucify
What CMS
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KiteDesk
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Sourcebot
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grep.app
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Sourcegraph for GitHub
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Sourcebot helps humans and agents understand large fragmented codebases. Deploy on-prem with a single docker command, and index all of your repos across any code host platform.
For humans, Sourcebot provides a web interface to allow anyone to search and ask questions across the entire codebase. For agents, Sourcebot provides a powerful MCP server that allows all your agents to fetch the context they need across all your companies repos.
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A great tool to help you discover the technology being used by a variety of websites. I was impressed that upon signing up that I had full access to a free list of leads.
Based on our record, BuiltWith seems to be more popular. It has been mentiond 162 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Evan You, creator of Vue.js, is a prime example. Vivek Nair, Co-Founder of BotGauge, notes that You โcreated something that addresses real developer needs with clean logic and thoughtful design.โ Vue.js powers over 1.5 million websites in 2025, a testament to its scalability and developer trust, as reported by BuiltWith. Youโs ability to build a framework independently, without corporate backing, underscores his... - Source: dev.to / about 1 year ago
There exist websites like https://builtwith.com so answer to your question is yes. - Source: Hacker News / over 1 year ago
BuiltWith says the web client is NextJS which is interesting as ChatGPT made a big switch away to Remix IIRC. https://builtwith.com/?https%3a%2f%2fclaude.ai%2fnew. - Source: Hacker News / almost 2 years ago
Also, wow that is an obsene amount of libraries they use: https://builtwith.com/?https%3a%2f%2fspectrum.ieee.org%2fdisney-robot-2668135204. - Source: Hacker News / about 2 years ago
I would say run both sites through https://builtwith.com/ to get what all they used in the building process. Source: over 2 years ago
Wappalyzer - Wappalyzer is a technology profilers and leads data provider. Create lists of websites and contacts that use certain technologies.
Sourcegraph - Sourcegraph is a free, self-hosted code search and intelligence server that helps developers find, review, understand, and debug code. Use it with any Git code host for teams from 1 to 10,000+.
WhatRuns - Extension that helps you identify technologies used on any website at the click of a button.
grep.app - grep.app searches code from over a half million public repositories on GitHub.
Elucify - A completely free software tool that uses crowdsourced data to find business email addresses
OpenGrok - OpenGrok is a fast and usable source code search and cross reference engine.
