Klaviyo (NYSE: KVYO) has agreed to acquire Agency, a three-year-old startup that builds AI-powered tools for customer success teams. The startup's founder, serial entrepreneur Elias Torres, will join Klaviyo as chief product officer, and Agency's 25-person team will help speed up development of Klaviyo's AI agents, called Composer and Customer Agent. Deal terms were not disclosed (TechCrunch).

The acquisition reunites Torres with Klaviyo co-founder and CEO Andrew Bialecki, whose working relationship goes back to 2010. At a startup called Performable, Torres hired Bialecki — then a recent Harvard graduate — as one of the company's first engineers. HubSpot acquired Performable in 2011. Torres later co-founded Drift, serving as CTO for eight years until its $1.2 billion sale to Vista Equity Partners in 2021. When Bialecki bootstrapped Klaviyo and raised its first outside funding in 2015, he invited Torres to invest in the seed round as an angel investor (TechCrunch).

Agency, founded in 2023, built an AI agent for customer success teams — software that automates tasks normally handled by customer success managers, such as checking in with clients and spotting accounts that need attention (TechCrunch). The startup raised $32 million from investors including Sequoia, Menlo Ventures, and Felicis before the acquisition. That total includes a $20 million Series A announced in November 2025 to build out its AI agent technology for customer success (Yahoo Finance).

Klaviyo completed its IPO in September 2023 at a $9.2 billion valuation. The company is betting that years of accumulated customer data give its AI agents an edge over competitors like Decagon and Sierra. Bialecki said Klaviyo would combine Agency's product with its existing agent products and bring them to 200,000 businesses, with the aim of reaching millions more over the next couple of years (TechCrunch).

Klaviyo has also announced a strategic partnership with Google to power autonomous customer experiences, according to the company's official newsroom (Klaviyo Newsroom).

The competitive logic here is straightforward. Klaviyo's core advantage in marketing automation has always been first-party customer data — purchase histories, browsing behavior, email and SMS engagement, and predictive analytics built into audience segmentation. If AI agents for customer support and success are only as good as the context they can draw on, a platform sitting on years of structured e-commerce interaction data has a meaningful head start over a standalone agent startup that has to build integrations from scratch. Torres and Bialecki are explicitly making that claim, and the argument carries real weight in a market where Decagon and Sierra are competing on agent quality without owning the underlying customer data layer.

Torres's track record is worth weighing. He has now built and sold two companies in the marketing and customer engagement space, both acquired by larger platforms that integrated his technology rather than running it as a standalone product. Performable's marketing analytics folded into HubSpot. Drift's conversational marketing platform was absorbed into Vista's portfolio strategy. Agency following the same arc into Klaviyo suggests Torres is optimizing for distribution and data access over independent scale, which is a reasonable calculus for an AI agent startup in a market consolidating rapidly around platforms with existing customer relationships.

The 25-person Agency team is small relative to the ambition Bialecki described. Scaling agent products to 200,000 businesses, let alone millions, will require integration work, model tuning for diverse e-commerce verticals, and reliability at a level that customer success automation demands. Getting customer-success-replacement agents wrong carries a different cost profile than getting a product recommendation wrong. Klaviyo is also layering in the Google partnership for autonomous customer experiences, which suggests the agent stack will rely on external model and infrastructure partners rather than fully proprietary infrastructure.

Torres is Nicaraguan-born and previously built teams at Drift and HubSpot before founding Agency (Agency Press). His move to chief product officer at a public company, rather than an entrepreneurial role within it, is a structural choice that gives him product roadmap control across the entire Klaviyo platform, not just the Agency technology.

For Klaviyo, the acquisition is a bet that the next phase of marketing automation converging with customer support and success will be won by platforms that own the data, own the distribution, and can deploy agents that operate on both. The deal is modest in headcount but strategic in positioning, and it puts a proven builder in the product seat at a moment when the AI agent layer of the software-as-a-service stack is taking shape.