Technology Intelligence
Find companies using any web technology
How it works
Build a targeted technology report in three steps
Pick a technology
Start from any of 75,000+ technologies, like every merchant on Stripe or every store running Shopify.
Filter to your market
Narrow by country, domain ending (.com, .co.uk…) and the social profiles they link to.
Export or sync
Download a clean CSV or push the report straight into your CRM, ready to prospect.
Take it anywhere
Claude
Chrome
HubSpot
Firefox
ChatGPT
Edge- Your WebApp
Who it's for
One dataset, many plays
Sales & research
Find the companies using a competitor or complementary tool and build a targeted report.
Marketers
Size a market by technology and target campaigns to the exact stack you integrate with.
Developers
Check what any site is built with and track adoption trends across frameworks over time.
Recruiters
Source companies by the exact technologies your candidates specialise in.
Security teams
Map the software a vendor or acquisition target runs before you assess them.
Investors & analysts
Track how fast a vendor is gaining or losing customers, quarter over quarter.
Partnerships
Find the companies already running the platform you build on top of.
Data teams
Pull the whole dataset over the API and join it to whatever you already model.
One platform
Turn tech signals into pipeline
Look up a site free, then export the companies that match.
Technology Lookup
Enter any website and instantly see its full stack: CMS, frameworks, analytics, hosting, payments and more. Always free.
Technology Reports
Build a report of every company using a technology. Filter by country, domain ending and social presence, then export or send to your CRM.
Compare Technologies
Put two technologies side by side: market reach, regional footprint, and where each one actually wins. Great for positioning.
Technology Signals
Watch any website and get an email the day it adds or drops a technology, every change logged on a timeline.
Live dataset
Explore the largest live web technology intelligence dataset
Every technology, ranked by how many sites use it and refreshed as we crawl the web. Explore the technology signals behind hundreds of millions of sites, by technology or category.
Testimonials
Here’s what our customers 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.”
“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.”
FAQ
Questions, answered
What is Ful.io?
How does Ful.io work?
Is Ful.io free to use?
Does Ful.io offer API access?
Every company on a tech stack, in one report
Look up any website’s tech stack free, forever · no card needed