When Klaviyo co-founder Andrew Bialecki hired Elias Torres as a mentor at Performable in 2010, neither could have predicted the trajectory that would lead them back together. Fifteen years later, the e-commerce marketing giant has agreed to acquire Agency, Torres' AI-powered customer success startup, in a deal that unites two founders whose paths have crossed at nearly every milestone of their careers. Main Developments Klaviyo, a publicly traded platform specializing in e-commerce marketing automation, will absorb Agency, a three-year-old startup that has raised $32 million from Sequoia, Menlo Ventures, and Felicis. Financial terms of the acquisition remain undisclosed, though the deal marks a strategic bet on AI agents as Klaviyo's next growth frontier. Torres, who will step in as Klaviyo's chief product officer, brings his 25-person team to accelerate two flagship AI products: Composer, which automates marketing campaign creation, and Customer Agent, which handles post-sale support tasks like returns and order tracking. Klaviyo CEO Andrew Bialecki told TechCrunch that the combined efforts aim to serve the platform's 200,000 existing businesses, with ambitions to reach "millions more" in the coming years. Read also: Google AI leaders exit to launch Discovery Loop startup For Torres, the move is a return to familiar territory. He previously co-founded Performable, which HubSpot acquired in 2011, and later Drift, where he served as CTO for eight years before its $1.2 billion sale to Vista Equity in 2021. His history with Bialecki runs deep: at Performable, Torres hired the then-recent Harvard graduate and mentored him on startup fundamentals. Background The relationship between the two founders dates back to 2010, when Torres brought Bialecki on as one of Performable's first engineers. Bialecki left to co-found Klaviyo, which he initially bootstrapped, and when the company raised its first outside capital in 2015, he invited Torres to participate as an angel investor in the seed round. Klaviyo's journey has been marked by significant highs and market turbulence. The company completed a high-profile IPO in September 2023 at a $9.2 billion valuation, though its stock has since declined alongside other SaaS companies. This acquisition appears to be a strategic response to that pressure, leveraging AI to differentiate in a crowded market. Why It Matters The deal positions Klaviyo to compete directly with AI customer service platforms like Decagon and Sierra, but with a distinct advantage: years of accumulated customer data from its e-commerce clients. Torres and Bialecki argue this data gives their agents a deeper understanding of business needs than rivals can match. For the broader tech industry, this acquisition signals a consolidation trend in the AI agent space, where startups with specialized technology are being absorbed by larger platforms seeking to integrate AI into their core offerings. Klaviyo's move could pressure competitors to pursue similar acquisitions or risk falling behind in the agent race. What's Next Torres will lead the integration of Agency's technology into Klaviyo's existing product suite, with the 25-person team expected to drive immediate development of Composer and Customer Agent. The company's near-term goal is to scale these agents across its 200,000 business customers, with a longer-term vision of expanding to millions. As Klaviyo navigates its post-IPO stock slump, the success of this acquisition will hinge on whether the combined AI capabilities can translate into tangible customer value and renewed investor confidence. The industry will be watching to see if this homecoming can spark the next phase of growth.