BuiltWith
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WhatRuns
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What CMS
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CloudSponge is a Contact Picker for all major address books. It allows your users to share their address books without ever needing to remember, type, or upload emails manually.
CloudSponge has been around since 2009 perfecting a product that will help companies get the most out of their existing word-of-mouth sharing feature.
Weโve come a long way from the copy and paste game. We know that once a customer has to leave a site to gather that information, they could leave forever. With the Contact Picker, users have straight access to their entire address books. Sharing contacts becomes a simple click. With straight access to their address books, users are going to share more. That means more site visitors, more referrals, more sales, better open rates, and lower customer acquisition costs.
BuiltWith CloudSpongeA 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.
ReachEdge - ReachLocal offers comprehensive digital marketing services to help businesses reach their customers. Start enhancing your local online marketing today.
WhatRuns - Extension that helps you identify technologies used on any website at the click of a button.
PersistIQ - It takes multiple touch points before a lead engages. PersistIQ automates the tedious parts while preserving the key human elements of sales
Elucify - A completely free software tool that uses crowdsourced data to find business email addresses
Dux Soup - Dux-Soup is a lead generation tool for LinkedIn.