Poojan
Kumar

Backup was boring.
Until he broke everything.

Cloud backup is not a headline category. It doesn't get the breathless press of AI tools or consumer apps. It is the part of enterprise infrastructure that every CIO prays they never have to think about - until the ransomware hits, and suddenly it is the only thing that matters. Poojan Kumar saw that asymmetry early and spent seven years building the company that would exploit it.

Clumio launched in August 2019 and raised $135 million three months later. Not three years later. Three months. By the time most startups have figured out their pitch deck, Clumio had already become one of the fastest-funded enterprise SaaS companies in cloud data protection history. The round closed at a moment when the market had just started waking up to what "moving to AWS" actually meant for backup, compliance, and ransomware exposure.

Kumar had been watching this shift for over a decade - first at Oracle, where he was a founding engineer on Exadata, then at VMware leading data products, then at PernixData where he co-founded a company that virtualized server-side flash and RAM. When Nutanix acquired PernixData in 2016, Kumar joined as VP of Engineering and Products. He stayed two years. Then, staring down his 40th birthday, he left.

That self-imposed deadline is one of the most candid things any Silicon Valley founder has ever said out loud. In a culture that mythologizes founders as fearless visionaries, Kumar simply admitted he was running a clock on himself - and acted on it.

When everyone moves to the cloud,
who backs up the cloud?

The insight behind Clumio is deceptively simple. When enterprises migrate to AWS, they shed their on-premise infrastructure - the servers, storage arrays, the tape libraries, and the backup software that ran on all of it. What they don't shed is the need to protect the data that now lives in S3, EC2, RDS, DynamoDB, and a dozen other services. They just lost the tools they used to do it.

Traditional backup vendors tried to follow the data to the cloud. They packaged their existing software into AMIs, spun up EC2 instances, and called it "cloud backup." Customers still had to manage software, patch it, size it, and pay for the infrastructure running underneath it. Kumar saw this as a category mistake - treating cloud infrastructure as if it were a data center with different wallpaper.

Clumio's answer was to deliver backup as a true SaaS service - no infrastructure to deploy, no software to manage, billed by usage, accessible via API. Air-gapped by default. Ransomware-resilient by architecture, not by checkbox. The platform supported Amazon S3, EC2, EBS, RDS, Aurora, DynamoDB, DocumentDB, and more - with a single pane of glass across all of it.

Kumar's vision extended even further: the data being backed up is also valuable data. Long-term, the opportunity wasn't just storage and recovery - it was analytics, compliance, and governance over data that enterprises had been hoarding in backup vaults for years without being able to use it.

From IIT Bombay to
two startup exits

Kumar's path runs from one of the world's most selective engineering programs through two decades of work on the most load-bearing problems in enterprise computing. The IIT Bombay computer science program admits roughly 150 students from a pool of 100,000 applicants. Kumar was one of them. He then went to Stanford for his master's, joined Oracle, and became a founding engineer on Exadata - Oracle's flagship database hardware platform and one of the company's most strategically significant products.

From Oracle he moved to VMware, where he led data products at a moment when the virtualization giant was expanding beyond its hypervisor roots into storage and data management. When he and two colleagues - Woon Ho Jung and Kaustubh Patil - left VMware to found PernixData in 2012, they were solving a specific problem: server-side flash and RAM could be virtualized just like compute had been, delivering massive I/O performance gains without rearchitecting applications. Nutanix agreed. They acquired PernixData in August 2016.

Two years at Nutanix as VP of Engineering and Products, then the itch to build again - and a birthday coming up. The three co-founders who had built PernixData together reconvened to build Clumio. Sutter Hill Ventures backed them before they had a product. That pre-product $11M Series A, in 2017, is itself a signal: investors were betting on the team and the market, not a demo.

Commvault buys the
company it couldn't build.

The acquisition story is worth reading slowly. Commvault is one of the oldest names in enterprise backup - founded in 1988, publicly traded, with decades of relationships with Fortune 500 IT teams. Clumio was everything Commvault was not: cloud-native, API-first, serverless, with no infrastructure for customers to manage. When Commvault wanted to accelerate its AWS cloud capabilities, they did not try to rebuild from scratch. They bought Clumio.

The $47 million acquisition price drew some attention given the $261 million raised, but the deal's logic was strategic acceleration rather than a pure financial exit. Commvault gained Clumio's AWS-native platform, its 1,000+ customer base, and critically, Poojan Kumar himself - installed as Chief Product Innovation Officer with a mandate to drive cloud-native product strategy at scale.

The pattern is familiar for anyone who has watched enterprise infrastructure acquisitions. The incumbent has the distribution, the relationships, the sales force. The startup has the architecture, the engineering, and the market proof. Neither can easily build what the other has. The deal makes both stronger in ways neither could achieve independently.

Kumar's investors include a notably strategic list: Mark Leslie, founder of Veritas Technologies - the company that essentially invented enterprise backup software in the 1980s - backed Clumio. So did John Thompson, former Microsoft Board Chairman. These aren't passive checks. They are architectural endorsements from people who spent decades building the category Clumio was disrupting.

Direct lines from
Poojan Kumar

Cloud-native backup,
without the hardware.

Clumio's architecture choices were deliberate rejections of every assumption the legacy backup industry had made. No EC2 instances to manage. No software to patch. No storage infrastructure to size. The platform ran entirely as a SaaS service, isolating customer backups in Clumio's own managed environment - making ransomware attacks that encrypted a customer's AWS environment unable to reach the backup copies.

Poojan Kumar
on video