Clumio.

The company that decided backup should disappear

Most backup software wants you to notice it. There is hardware to buy, a console to babysit, agents to push, a maintenance window to defend on a Tuesday night. Clumio took the opposite view: the best data protection is the kind you forget exists, right up until the morning you desperately need it.

That contrarian instinct came from people who had seen the old way up close. Clumio was founded in 2017 by Poojan Kumar, a serial entrepreneur whose previous company, PernixData, was acquired by Nutanix. He brought along co-founders Woon Ho Jung and Kaustubh Patil, engineers schooled at VMware and Nutanix - people fluent in the failure modes of enterprise infrastructure. They had a thesis, not a product. Investors wrote a check anyway: roughly $11 million arrived before a single line of Clumio shipped. When you have built and sold a company before, the market lends you a little faith.

The bet: build for the cloud, on the cloud

The insight was almost stubbornly simple. If your customers' data lives in the cloud, your backup platform should too - not as a virtual copy of an old appliance, but as something born serverless. Clumio ran no hardware in the customer's environment and installed no agents. It discovered workloads, applied a policy, and got out of the way. The architecture could stretch to protect the largest and messiest data sets on the planet, because it borrowed the cloud's own elasticity instead of fighting it.

That choice aimed Clumio squarely at Amazon Web Services. Over time the platform learned to protect the whole AWS pantry: S3, DynamoDB, RDS and Aurora, EC2 and EBS, even Apache Iceberg lakehouses. The backups were air-gapped and immutable - encrypted in transit and at rest, isolated so that ransomware could not reach in and quietly delete the safety net. In a world where attackers go for the backups first, "you cannot edit this" turned out to be a feature worth paying for.

The hard part: making giant data feel small

Amazon S3 is where Clumio drew its sharpest line. In 2022 the company shipped breakthrough protection for S3 that could cover up to 30 billion objects in a single bucket, with a recovery point objective measured at 15 minutes and a recovery time objective the company pushed toward zero. Two features made the difference feel almost theatrical. Backtrack used S3 Versioning to roll a bucket back in place, near-instantly, even at enormous scale. Instant Access Restore mounted a read-only copy from backup so an application could limp back to life in minutes while the full restore finished quietly in the background.

This is the part customers actually care about, even if they never say it out loud: not how data is stored, but how fast it comes home. Clumio sold the recovery, not the backup.

Who showed up

The logos arrived. Atlassian, LexisNexis, Warner Bros. Discovery, Cox Automotive, CAVA - companies with serious AWS footprints and very little appetite for losing data. The recognition followed: 2023 InfoWorld Technology of the Year for cloud compliance and governance, a spot on DBTA's list of big-data innovators, and a reputation as a Most Loved Workplace. The money kept pace too, from a $40 million Series B in 2019 to a $135 million Series C later that same year - a raise large enough to make a two-year-old startup a headline - and on to a $75 million Series D in early 2024.

The exit, and the irony

In September 2024, Commvault - a backup company old enough to remember the appliance era Clumio was built to escape - agreed to acquire it. The reported price, around $47 million, was modest by acquisition standards and immaterial to Commvault's balance sheet, but the strategic logic was loud. Commvault had spent years close to Microsoft Azure; Amazon S3 object storage was a gap, and Clumio was the cleanest patch available. The deal was expected to be immediately accretive to recurring revenue. Poojan Kumar stayed on as chief product innovation officer. The startup that set out to make backup disappear had, in a sense, disappeared into the very industry it was needling - taking its serverless DNA with it.

And so we return to that S3 bucket with its 30 billion objects. The policy that protects it has not changed. The dashboard still watches without blinking. The only difference is the name on the door - and the quiet proof that betting on the cloud, early and completely, was the right bet all along.