Dropbox is buying Tigris Data for $350 million in cash, and the Dropbox Tigris acquisition is the biggest deal in the company’s 19-year history. The agreement was signed November 3 and announced Thursday, November 5, alongside a new business called DBX Agent Cloud that will sell storage to companies building AI applications.

For a company that made its name syncing files between your laptop and your phone, this is a sharp turn. Dropbox isn’t buying a consumer app. It’s buying pipes — the kind of storage infrastructure that AI agents and models need to hold the images, videos, and documents they work with.

And the timing isn’t an accident. Dropbox’s core business is barely growing, and the AI infrastructure boom is the biggest spending wave in tech right now.

What Tigris brings to Dropbox

Tigris Data is a Sunnyvale startup founded in 2021 by former Uber engineers who helped build the ride-hailing company’s storage systems. Its product is globally distributed object storage that works with tools built for Amazon S3, the cloud storage standard. Two details set it apart: it charges no egress fees — the charges cloud providers levy when data leaves their systems — and it keeps its metadata in FoundationDB, the transactional database Apple open-sourced in 2018.

Tigris is small. It has raised about $31.9 million since its founding, including a $25 million Series A in October 2025 led by Spark Capital, with Andreessen Horowitz and Basis Set Ventures also taking part. Dropbox is paying roughly 11 times that total funding for the company.

That math tells you what Dropbox is really buying. It’s not Tigris’s revenue. It’s a team that knows how to run storage across multiple clouds, and a product that slots straight into the S3-shaped world most AI developers already live in.

What the Dropbox Tigris acquisition includes

DBX Agent Cloud is the new business Dropbox is building around the deal. It starts as standalone object storage that developers can buy on their own and use with the S3 tools they already know. Later phases add a file system and content-processing features for documents, images, audio, and video.

Dropbox hasn’t said when the standalone storage goes on sale, what it will cost, or what service guarantees come with it. The company also hasn’t given a launch date for the file system and content layers.

One thing is settled: the purchase hasn’t closed. Dropbox told TechCrunch the deal is expected to close in the fourth quarter of 2026, subject to customary closing conditions. Until then, Tigris is still an independent company.

The numbers behind the deal

Dropbox announced the acquisition alongside its third-quarter results, and those numbers explain the urgency. Revenue was $637.3 million, up just 0.5% from a year earlier. Paying users totaled 18.20 million, up 20,000 from the previous quarter. Total annual recurring revenue stood at $2.555 billion.

Cash, cash equivalents, and short-term investments ended the quarter at $1.142 billion. That puts the $350 million price tag in perspective: Dropbox is spending about 30% of its cash on this one deal.

Wall Street wasn’t thrilled. Dropbox shares fell about 3% after the announcement, according to The Motley Fool. Investors have heard plenty of AI pivots from companies with flat core businesses, and they’re waiting to see revenue before they cheer.

Why this matters

Here’s the case for the deal: nobody in the industry has run storage at Dropbox’s scale for as long. The company stores exabytes of customer data, spent years moving most of it off Amazon S3 onto its own systems, and now wants to rent that know-how to AI developers instead of keeping it in-house.

“We’re putting the infrastructure we’ve built over nearly two decades to work for companies building AI applications, opening a new avenue for growth,” co-chief executive Ashraf Alkarmi said in the company’s earnings release.

The bet is that AI agents need a different kind of storage than chatbots did. Agents hold onto files for weeks, pull records from all over, and rack up egress fees moving data between clouds. A storage service with no egress fees and S3 compatibility is built for exactly that pattern.

Dropbox isn’t alone in chasing it. Amazon, Cloudflare, and a wave of startups are all selling storage to AI builders, and Tigris itself was a small player in that fight. Dropbox’s edge is its installed base — more than 700 million registered users — and the chance to bundle Agent Cloud storage with the file tools those users already have.

None of that is guaranteed. Dropbox also rolled out a redesigned app and new AI productivity features for Standard and Advanced customers in the U.S., U.K., and Australia on the same day, a reminder that the company is still trying to grow its core product too. The Tigris deal is the bigger swing. We’ll know within a year whether Agent Cloud is a real business or another line in an earnings release.

Frequently asked questions

What is Tigris Data?

Tigris Data is a Sunnyvale startup founded in 2021 by former Uber engineers. It sells globally distributed, S3-compatible object storage with no egress fees, aimed at developers building AI applications.

What is DBX Agent Cloud?

DBX Agent Cloud is Dropbox’s new infrastructure business for companies and developers building AI applications. It starts as standalone S3-compatible object storage, with filesystem and content-processing features planned later.

When will the Dropbox Tigris acquisition close?

Dropbox expects the deal to close in the fourth quarter of 2026, subject to customary closing conditions. The agreement was signed November 3 and announced November 5.

How much is Dropbox paying for Tigris?

About $350 million in cash, subject to customary purchase price adjustments. It would be Dropbox’s largest acquisition since the company was founded in 2007.

Sources: TechCrunch, Unite.AI, SiliconANGLE, Business Wire, The Motley Fool.