About us
Built for Sales & Marketing Teams
At Ful.io, we help sales and marketing teams stop guessing — and start targeting with precision.
We're not just another tech profiler. We provide real-time technographic intelligence that helps you discover what technologies websites are using — from your hottest leads to your fiercest competitors. Whether you're chasing faster outreach, smarter prospecting, or sharper insights, we make sure you know who’s using what — and when.
Founded in 2021, Ful.io is trusted by sales and marketing teams who want to go beyond basic data. Our engine scans and tracks hundreds of millions of websites, revealing key signals across tech stacks like LMS, CRMs, email platforms, eCommerce, CMSs, analytics, hosting providers, and more.
Need to find leads running a specific tool? Want to enrich existing data with emails?
Ful.io gives you the visibility to prioritize and personalize at scale.
We're a lean, fast-moving team headquartered in Delaware, USA, committed to building tools that are intuitive, powerful, and always improving.
If you're ready to grow smarter, we'd love to talk.
Get in touch to book a free demo or explore how Ful.io can fit into your sales strategy.
Trusted by Businesses of All Types Worldwide
Here’s what our customers have to say about us
Ful.io has been a game-changer for our market research. The ability to instantly analyze what technologies our competitors are using has helped us make informed decisions about our own tech stack. Highly recommended for any growing startup.
Todd Dunsmore
Doja Marketing/Defi Founder
Ful.io's apps and tools have completely changed the way we look at traffic and identify prospects. Before, our R&D team tried BuiltWith, then worked to develop our own technology. But with Ful.io, we can save both time and money.
Robert Kaene
The Wednesday Club
We're always looking for new ways to boost our advertising efforts and analyze websites to improve our processes. Ful.io has been a perfect partner throughout. We've been able to discover more valuable data on prospects than we ever did on our own.
Mad Singers
SEO Mastery Summit
Any ecommerce platform not using Ful.io's technologies is seriously missing out. The crawling tool at Ful.io is the best we've used so far. We love that you can pull it up right in the Chrome browser too. Technologies, contact info, the speed we can draw in new clients now... Ful.io is amazing!
Yana L
SEO Consultant
Companies need an edge, and Ful.io provided that edge for us. We'd previously used BuiltWith, but the data and analytics capabilities of Ful.io were a better fit for us.
Nicholas Altimore
Sirlinksalot
Being able to quickly identify the software and security tools a website is using helps us assess risks and provide better recommendations. Ful.io’s technology profiling is both powerful and incredibly easy to use, which is exactly what we needed. Ful.io just works for us. Their technology is incredible.
Chris Richards
Utterly Digital
