Dropbox agrees to buy AI object-storage start-up Tigris Data for about $350M in cash, which it calls its largest deal

TLDR

• Dropbox agreed to buy Tigris Data, an AI-focused object storage start-up, for about $350M in cash.¹²
• The deal is pending: closing is expected in the fourth quarter of 2026, subject to customary conditions.²³
• Tigris had raised about $31.9M, per Crunchbase data; investors' proceeds from the sale are undisclosed.⁴

Dropbox announced on 5 November that it plans to acquire Tigris Data Inc., which it describes as "a globally distributed object storage platform built for AI workloads".¹ The press release gives no price. Dropbox's filing with the US Securities and Exchange Commission says it entered into a definitive agreement on 3 November to acquire all of the outstanding equity of Tigris "for cash consideration of approximately $350 million, subject to customary purchase price adjustments", with closing expected in the fourth quarter of 2026 and subject to customary closing conditions.² The deal is therefore agreed but not completed, and TechCrunch's "acquires" headline overstates it.³ Dropbox told Crunchbase News it would be the company's largest acquisition since its founding in 2007, while TechCrunch hedges that it "appears" to be the largest.⁴³ The earlier large purchases Crunchbase News lists are HelloSign at $230M in 2019 and DocSend at $165M in 2021.⁴

Dropbox says the purchase will accelerate its entry into AI infrastructure, building on nearly two decades of operating storage systems at scale, and launched DBX Agent Cloud alongside it, a standalone S3-compatible object storage service that companies can buy independently.¹ Eric Webster, Dropbox's chief business officer, told Crunchbase News that Tigris brings "a product already running in production, an experienced team, and established relationships with AI developers".⁴ The New Stack's headline frames the deal against Dropbox's earlier move off AWS S3 to its own storage system.⁵ Tigris tells its customers that nothing changes: the same product, S3-compatible API, pricing with zero egress fees, and team.⁶ Dropbox told TechCrunch that no headcount reduction is planned in the acquisition.³

Tigris was founded in 2021 and had raised about $31.9M in total, according to Crunchbase data, so the price is roughly 11 times the funding raised; that ratio is arithmetic, not a disclosed return, and ownership and proceeds by investor are not disclosed.⁴ Its $25M Series A in October 2025 was led by Spark Capital with participation from Andreessen Horowitz and others, and its founders previously built Uber's global storage platform.⁷ TechCrunch reported more than 4,000 customers at that point, which is a company claim.⁸ Crunchbase News also names Basis Set Ventures and General Catalyst among the backers, which the Tigris post does not; who led the seed round is reported inconsistently, so it is not stated here.⁴

On the investors' track record in the same field, Martin Casado of Andreessen Horowitz published an investment note on Tigris in February 2024, and Basis Set lists Tigris as a 2021 seed investment in scalable infrastructure.⁹¹⁰ Spark Capital's own site lists other infrastructure holdings including Baseten (machine learning infrastructure), Crusoe (AI infrastructure and cloud services) and Enfabrica (AI networking silicon); no other object-storage investment by Spark was found.¹¹

Why it matters: a listed software company paying about $350M in cash for a start-up that had raised about $32M gives Spark, Andreessen Horowitz and the other backers a sizeable exit in AI infrastructure, though the deal has not closed and the split of proceeds is undisclosed.²⁴