Fibr AI raises $5.7M in Accel-led seed round

Fibr AI raised $5.7 million in a seed funding round led by Accel, as the San Francisco–based startup looks to build what it calls an “agentic web experience layer” that allows websites to dynamically adapt to both human users and artificial intelligence systems.

The round included participation from WillowTree Ventures and MVP Ventures, along with angel investors who are operators at Fortune 100 companies. The latest financing follows a $1.8 million pre-seed round in 2024, also led by Accel, taking the company’s total funding to $7.5 million.

Founded by Ankur Goyal and Pritam Roy, Fibr AI aims to turn each web page into an autonomous system that can tailor content in real time based on signals such as audience, channel and intent. The company says this approach also accounts for the growing role of AI agents and automated systems, which increasingly scan and evaluate websites before users engage with them.

“Marketing has become intelligent everywhere except the website,” Goyal, the company’s chief executive officer and co-founder, said. “Channels adapt. Targeting adapts. Messaging adapts. But the website—the system where intent is supposed to turn into outcomes—has remained static”

“Most teams don’t lack data or intent—they’re constrained by the operating model,” Roy, Fibr’s chief product officer and co-founder, said. “By moving intelligence into the URL itself, Fibr allows websites to learn continuously and adapt in real time, without waiting on people or processes”

Accel said the shift in how users discover information online makes adaptive websites more critical. “CMS-based websites are effective at publishing content, but not at understanding context or adapting in real time,” said Prayank Swaroop, a partner at Accel. “In that world, the website can’t just be a destination; it has to respond immediately and intelligently”

Fibr said it has seen reductions of 35% to 50% in customer acquisition costs and higher engagement across enterprise clients in sectors including financial services, telecom and healthcare. The company plans to use the funding to further develop its platform and expand enterprise adoption.