Graphon Labs, a San Francisco startup that builds memory for AI agents, has raised $35m. RRE Ventures led the Series A. HP, Energy Impact Partners, Hitachi Ventures and Gaia VC also invested, Graphon said on Tuesday. The round brings its total funding to $43.3m, less than six months after it left stealth with an $8.3m seed round.
The 20-person company will spend the money mainly on engineers and researchers, plus some sales staff. Chief executive Arbaaz Khan gave those details to Shubhangi Goel of Business Insider, which reported the round first.
Khan compares common AI search to tearing the pages out of a book and digging through the scraps for an answer.
“You've basically lost all that information because each piece is living on its own,” he told Business Insider.
A map instead of a torn-up book
AI agents can write code and carry out tasks. But they can lose track of past conversations and changing company data. Graphon says common methods can lose context, relationships and timing as data grows. One example is retrieval-augmented generation (RAG), which feeds a model snippets of stored text.
Graphon's system is built on graphons, a mathematical framework for very large graphs. Khan and co-founder Clark Zhang built graph-based memory for robots during their PhDs, Khan wrote in a blog post. The software maps the links between a company's documents, videos and images, including where information came from and when it changed.
“You can basically point your Claude or GPT or whatever to Graphon,” Khan told Business Insider.
Graphon says it scored 93.9% on LoCoMo, a test of memory over long conversations. It used 58% fewer tokens than loading the whole conversation into the model. On ATM-Bench, a University of Cambridge benchmark across video, audio, images and text, it scored 81.7%. That is 5 points ahead of the next system on the public leaderboard.
Customers and what comes next
Graphon says the San Francisco 49ers, Hitachi and other large companies use its software. HP also uses it, Business Insider reported. Costa Kladianos, the 49ers' executive vice president of technology, said the team is exploring how to use it. One example is finding new sponsorship deals. Hitachi Rail said its evaluation “shows promise” in its industrial setting.
The company has three products: Graphon Enterprise, a developer platform, and on-device memory for phones, laptops, cameras and wearables. Khan told Business Insider that Graphon will stay focused on enterprise customers before moving further into devices and consumer products.
The biggest AI companies are also adding memory to their assistants. In August, Anthropic merged Claude's memory across chat and Cowork. In October, Apple's iOS 27.2 gave Siri memory.