Sequen's proprietary Large Event Models and low-latency ranking infrastructure deliver real-time personalization previously only available to the world's largest tech platforms

Sequen today announced a $16 million Series A funding round, bringing total funding to $22 million to bring sub-second in-session personalization and behavior optimization to the enterprise. The round was co-led by White Star Capital and Threshold Ventures, with participation from all existing investors including Greycroft, which led the company’s seed round.

The Sequen Ranking Platform is the first integrated infrastructure and frontier model AI platform designed specifically for in-session personalization and dynamic re-ranking for enterprise consumer applications. Replicating that capability has historically required billions of users, massive datasets, and bespoke infrastructure built over years. Sequen makes it accessible to any consumer enterprise, without the operational burden of building and maintaining low-latency AI infrastructure in-house.

At the core of the platform is Sequen IQ, a suite of ranking models that goes beyond user attributes to train on live user events including clicks, scrolls, hovers, views, and conversions to adapt experiences in real time. Sequen invented Large Event Models (LEMs), which generalize user behavior on sparse data, enabling consumer companies to dynamically re-rank their applications in real-time. Sequen’s purpose-built infrastructure is optimized for sub-20 millisecond decisioning. This combination allows enterprises to create dynamic applications that adapt to each user in real-time, their in-session behavior, and micro-interactions to provide a hyper-relevant experience that drives meaningful business outcomes, while removing the need to build and operate sub-20ms infrastructure in-house.

“Modern consumer technology isn’t just recommending content anymore, it’s shaping behavior over time,” said Zoë Weil, Founder and CEO of Sequen. “What we’ve built is the ability to do this without needing billions of users, solving the data sparsity issue enterprise companies face. We train on behavior, not identity, effectively replacing the cookie and enabling real-time optimization for consumer-scale businesses.”

“Zoë is a once-in-a-generation founder. Her entire career has been spent building and scaling the ranking systems that drive revenue for the world's largest enterprises,” said Eddie Lee, General Partner at White Star Capital. “Our conviction was immediate. When a founder combines that depth of domain expertise with this level of execution, our job as investors is simple: remove every obstacle to global scale.”

Since closing its seed round, Sequen has partnered with some of the world’s largest consumer companies. Fortune 500 customers have seen material lift in conversion and revenue within days of deployment. Sequen recently introduced RankTune, a platform that enables internal teams to build, create features, and rapidly iterate on Sequen’s frontier models without managing the enormous infrastructure required for sub-20ms dynamic re-ranking.

“The consumer internet has fundamentally changed. User expectations have been reset by AI, and every major platform is now scrambling to catch up. Sequen has already proven, repeatedly, with Fortune 500 companies, that their AI drives real revenue,” said Lisa Xu, Partner at Threshold Ventures. “This is not an efficiency play. This is enterprise-ready AI that makes money, and Sequen's platform is going to become foundational infrastructure for every consumer company that wants to compete in the AI era.”

“We're constantly looking for ways to make the Fetch app more rewarding for our users and we have some of the best AI scientists in the industry working on improving conversion every day,” said Ori Schnaps, Chief Technology Officer at Fetch. “Sequen built on that foundation and helped us unlock a substantial lift in conversions, showing us what's possible when a world-class internal team and the right external partner pull in the same direction.”

Sequen has scaled from concept to production in under 18 months, now processing more than 20 billion monthly requests. The company's founding team includes leaders from Google DeepMind, Anthropic, Meta, and Etsy, and recently added Raphael Louca as Chief Product Officer, who joins from Meta. The new funding will accelerate product development and hiring as enterprise demand grows.

About Sequen:

Sequen AI delivers dynamic, in-session personalization for enterprise consumer companies, turning relevance into a revenue engine that drives material business outcomes. Sequen AI is the inventor of Large Event Models (LEMs) and the first company to offer continual learning on dynamic user embeddings at inference. Sequen AI is able to generalize behavior on sparse data to dynamically optimize rankings, recommendations, and discovery experiences with sub-50ms latency, providing hyper-relevant user experiences and unlocking meaningful lift across conversion, revenue, and engagement.

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