HubSpot Brings Back Co-Founder Brian Halligan as CEO in an AI "Refounding"

HubSpot said on Thursday, November 12, that co-founder Brian Halligan will return as chief executive, replacing Yamini Rangan, who is stepping down as CEO and from the board effective the same day. Halligan, who led HubSpot for 16 years through its IPO, says he will "re-found" the company around AI agents, while Adobe executive Karen Burgess will become chief financial officer in February 2027.

Nahid Joy

Nov 13, 2026 - 09:39

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HubSpot co-founder Brian Halligan smiles at the camera, wearing glasses, a dark suit jacket and a light blue striped shirt, against a dark gray background.

HubSpot Brings Back Co-Founder Brian Halligan as CEO in an AI "Refounding"

HubSpot is bringing back its co-founder. The customer software company said on Thursday, November 12, that Brian Halligan will return as chief executive officer, replacing Yamini Rangan, who is stepping down as CEO and from the board effective the same day. Rangan will remain with the company through December 1 to help with the handover. In the same announcement, HubSpot said chief financial officer Kate Bueker will retire on February 11, 2027, and that Adobe executive Karen Burgess will succeed her.

Halligan is not framing the move as a simple change of chief executive. He says he plans to "re-found" the company from the ground up — product, go-to-market and culture — around AI agents, and to build what he calls "the customer relationship harness that will enable millions to grow better." In a post on X on Thursday, he put it more bluntly: "I'm back as CEO of @HubSpot today. @dharmesh and I are completely re-founding the company. Its day 1. We're now the Customer Harness Company."

A refounding around AI

Halligan co-founded HubSpot in 2005 with technology chief Dharmesh Shah, who still holds that role, and served as CEO for 16 years, leading the company from its founding through its 2014 initial public offering to a market capitalisation of more than $30 billion in 2021. He handed the job to Rangan in September 2021, after a snowmobile accident earlier that year, and moved to executive chairman.

The return comes as HubSpot tries to reposition itself around AI agents, the autonomous software that can carry out sales and marketing work with less human direction. The company describes itself as an "agentic customer platform," and Halligan's argument is that the category is being remade and HubSpot needs a founder's rebuild, not a steady hand, to keep up. Board chair Lorrie Norrington said the board is unanimous in backing Halligan's plan. HubSpot also reaffirmed the fourth-quarter and full-year 2026 financial guidance it issued with its third-quarter results on November 4.

Investors liked the news, at least at first. HubSpot's shares climbed 6.1% in premarket trading on Thursday after the announcement, according to market reports.

Rangan's five years

Rangan joined HubSpot in 2020 as its first chief customer officer and became CEO the following September. Under her leadership, the company grew from 135,000 customers to more than 311,000 and from $1.3 billion in revenue in 2021 to an expected $3.7 billion in 2026. The company has not given a reason for her departure.

Her exit comes after a difficult year. HubSpot's shares are down about 47% year over year, according to CMSWire, and the company cut about 660 jobs roughly a month ago. The leadership change is the latest in a run of founder returns across the technology industry, where boards have turned back to the people who built their companies when a strategic reset is needed.

A new CFO too

The second change is at the top of the finance team. Bueker, who has been chief financial officer for eight years, will retire on February 11, 2027, in what the company described as a long-planned retirement, and will remain as an adviser until December 31, 2027. Burgess, currently senior vice president and chief financial officer of Adobe's Creativity & Productivity business unit, will join HubSpot on November 30 as executive vice president of finance and take over as CFO on February 11.

Why it matters

HubSpot is a test case for a question facing much of the software industry: what happens to a company built on selling tools for human sales and marketing teams when AI agents start doing that work themselves? Halligan's answer is to rebuild the company around the agent era, and his return gives that rebuild a founder's authority. Whether the "refounding" amounts to a new product strategy or mostly a new story for investors will become clear in the months ahead, when Halligan has promised to explain in detail why he came back and what he plans to change.