Profile / Software Supply Chain
Glenn Weinstein
The Cloudsmith CEO securing the software supply chain in the age of AI - from Belfast, by way of the Navy, Appirio and Twilio.
Glenn Weinstein / Cloudsmith
The Cloudsmith CEO securing the software supply chain in the age of AI - from Belfast, by way of the Navy, Appirio and Twilio.
Glenn Weinstein spends his days on a problem most people never think about until it breaks: everything that flows into modern software. As CEO of Cloudsmith, the cloud-native software supply chain platform headquartered in Belfast, he leads a company that stores, secures and distributes the packages, containers and artifacts that development teams pull into their builds. When a dependency carries a hidden vulnerability or a piece of malicious code, that is the moment Cloudsmith is built for.
The timing has turned his corner of the industry into one of the busiest in tech. AI coding agents now generate software faster than any human review process can keep up with, and enterprises are scrambling for guardrails. In April 2026 Cloudsmith raised a $72 million Series C led by TCV with participation from Insight Partners, bringing total funding to roughly $124 million. "Cloudsmith is the only platform built for the way software is being developed today - by AI agents," Weinstein said at the time.
AI agents generate so much software, so fast, it's nearly impossible for humans to carefully review it all.- Glenn Weinstein, on why Cloudsmith exists
Weinstein learned to program on a Commodore 64, and he still talks about that first thrill of building something from scratch that does something cool. That instinct carried him a long way from home. He is a U.S. Naval Academy graduate and a former naval flight officer, and he later earned a master's in computer science from Rensselaer Polytechnic Institute.
In 2006 he co-founded Appirio, one of the first large-scale consulting partners to the cloud pioneers - Salesforce, Workday and Google. Over more than a decade there he held nearly every senior technical seat: CTO, CIO, SVP of global services. Appirio sold to Wipro for around $500 million, and Weinstein watched firsthand how nimble SaaS companies displaced entrenched on-premise incumbents. It is a pattern he now expects to repeat, with Cloudsmith taking on legacy tools like JFrog's Artifactory and Sonatype's Nexus, which he describes as built for "the pre-cloud generation."
Then came Twilio. As Chief Customer Officer for four years, he led customer success, developer relations and partner programs for a base of nearly 300,000 customers including Allergan, Philips and Toyota. During his tenure Twilio's annual revenue climbed from roughly $800 million to $4.5 billion. Cloudsmith, he has said, is his first job as a CEO - the role he spent 25 years preparing for without holding.
Plenty of executives would have run a Northern Ireland startup by video call from New York. Weinstein packed up instead. He relocated to Belfast in August 2023 to take the job in person, succeeding co-founder Alan Carson and joining co-founders Carson and Lee Skillen in building the company. "Spending time in Belfast, and getting to know and love this city and the whole of Northern Ireland - it's a special place," he has said.
His enthusiasm for the company rests on a few things he keeps coming back to: a "100% dedicated to the cloud" model, strong company values, and the fact that Cloudsmith is "born and bred as a Northern Ireland company" focused on making the lives of software developers easier. He credits two mentors, Twilio's Jeff Lawson and Tercera's Chris Barbin, with teaching him how to do the CEO job right.
"I try to keep everyone motivated and inspired, and be the highest-energy Cloudsmither on the team." In a scaling company, he argues, attitude blossoms into "wild ambition mixed with a small dash of pragmatism."
He frames artifact security through a food analogy: just as food companies keep harmful ingredients out of their supply, teams shouldn't let developers pull in artifacts carrying vulnerabilities or malicious code.
His thesis for the Series C is blunt - AI agents write code faster than humans can review it, and Cloudsmith has "the scale, and the broad view across the open-source ecosystem" to catch new threats.
“I learned to code on a Commodore 64, and I love the excitement of building software from scratch that does something cool.”
“You don't want your developers inadvertently using artifacts with security vulnerabilities or even malicious code. It's similar to how food product companies need to ensure their supplies are free from harmful ingredients.”
“Cloudsmith is the only platform built for the way software is being developed today - by AI agents.”
“TCV and Insight Partners both recognise this profound shift, and their backing is helping Cloudsmith scale up for the massive wave of adoption of AI agents across enterprise software teams.”