Atlassian (NASDAQ: TEAM) is acquiring a US AI-powered browser startup in a deal worth US$610 million (A$935m) in cash.
Atlassian cofounder Mike Cannon-Brookes has been a fan of The Browser Company (TBC), and its product Dia, which he calls “the knowledge worker’s browser”, since it was released in mid-2025 in beta mode, sending bug feedback and requesting features.
Founded in August 2019, the New York’s had initial success with a browser called Arc, but dumped it in May in favour of Dia with CEO and founder Josh Miller saying at the time that its interface and workflow had a high “novelty tax,” users were unwilling to learn and embrace.
The deal, which is expected to close in the final quarter of 2025, adds a little over to 10% to TBC’s valuation since it was worth US$550 million valuation in March 2024 following a US$50m Series B, that followed a US$75.5m Series A in 2023. Altassian was already an investor in the business along with likes of Salesforce Ventures, Figma cofounder Dylan Field, LinkedIn cofounder Reid Hoffman, Medium’s Ev Williams,Notion’s Akshay Kothari, and GitHub’s Jason Warner.
Atlassian’s funding the acquisition from cash on its balance sheet, and it’s not expected to have a material impact on the company’s financials in FY 2026 and 2027.
Cannon-Brookes, Atlassian’s CEO, said current browsers aren’t built for work, the rise of SaaS apps, and now the AI era.
“This deal is a bold step forward in reimagining the browser for knowledge work in the AI era,” he said.
“By combining The Browser Company’s passion for building beloved browsers with our two decades of understanding how knowledge workers operate, we see a huge opportunity to transform the way work gets done.
Together, we’ll create an AI-powered browser optimised for the many SaaS applications living in tabs – one that knowledge workers will love to use every day.”
He wants to put Dia at the centre of his workplace productivity software products, across email, project management tools, and design apps.
TBC will remain a standalone business as part of Atlassian. Miller, the CEO said it deal is all about speed for the company’s ambitions with Dia.
“For laptop workers, your browser is where your job actually happens – where you spend hours working within tabs every day,” he said.
“That context, plus access to your tools, is incredibly valuable for AI. Atlassian gets that. Teaming up means we can move faster, dream bigger, and focus on building an AI browser for work that people genuinely love to use – one that is trusted by companies but feels personal to every individual.”
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