Uber accelerates incident detection, DCAI speeds up AI training and cluster efficiency, and Nebius improves MTBF in large-scale distributed AI training-all powered by Clockwork’s first-of-a-kind Software-Driven-Fabric.
PALO ALTO, CA / ACCESS Newswire / September 10, 2025 / Clockwork, the company redefining how enterprises run large-scale AI infrastructure, today announced FleetIQ, a first-of-its-kind Software-Driven Fabric (SDF) built to maximize GPU utilization, accelerate AI job performance, increase infrastructure reliability, and cut infrastructure waste. The launch marks a strategic expansion that extends Clockwork’s Cloud capabilities-sub-microsecond visibility and cluster performance acceleration-into the AI and GPU domain, while adding stateful fault tolerance to prevent AI job crashes and slowdowns.
By transforming idle silicon into productive intelligence, Clockwork’s FleetIQ empowers enterprises, neoclouds, and hyperscalers to unlock greater performance from the same GPUs-delivering AI that is faster, more reliable, energy-efficient, and economically sustainable. This first-of-its-kind technology has attracted strong industry support. Led by existing investor NEA, Clockwork closed a new funding round at four times the valuation of its previous raise just two years ago. The round welcomed distinguished new backers, including Intel CEO Lip-Bu Tan, former Cisco CEO John Chambers, venture pioneer Carl Ledbetter, and e& Capital. Underscoring this momentum, the company appointed industry veteran Suresh Vasudevan as Chief Executive Officer and Joe Tarantino as Vice President of Worldwide Sales.
As AI moves from research to production, the bottleneck has shifted from raw compute to communication-between GPUs, across clusters, and across clouds. Most training jobs today run on NVIDIA or AMD GPUs with NVLink, InfiniBand and RoCE networks, but the challenge is universal: large GPU fleets must stay perfectly synchronized, and if even one link lags, the entire job pauses. In practice, this leads to what’s known as the “AI efficiency gap.” Despite massive investment, real-world GPU clusters achieve only ~30-55% of their theoretical performance, with further losses from disruptive faults and link failures occurring multiple times a week in large-scale systems. At scale, the cost of this inefficiency is staggering. Training today’s largest foundation models on a 100,000-GPU cluster-a $5-7 billion investment-can waste more than $2.25 billion in unused capacity. Closing this gap is now one of the defining challenges in scaling AI.
FleetIQ, Clockwork’s Software-Driven Fabric, directly addresses this challenge. Cofounded by Yilong Geng, Deepak Merugu and their PhD supervisor Professor Balaji Prabhakar, Clockwork’s foundational technology-software-based highly accurate Global Clock Sync and Dynamic Traffic Control-was developed at Stanford. FleetIQ leverages this foundation and delivers microsecond-level visibility across fleets and workloads to rapidly pinpoint slowdowns and failures. It adds stateful fault tolerance that keeps jobs running when links fail, avoiding costly AI job restarts; and boosts throughput with real-time, path-aware routing that eliminates contention and congestion. FleetIQ is hardware-agnostic, running across heterogeneous environments-NVIDIA, AMD, and custom accelerators; NCCL and RCCL; InfiniBand and Ethernet/RoCE-on-prem or in the cloud. The result: faster AI jobs and consistently high cluster utilization.
“AI has become the most distributed and demanding application in human history, and the next decade of AI infrastructure will belong to those who master communication between GPUs, between clusters, and clouds. Communication is the new Moore’s Law: the defining constraint to overcome for scale. At Clockwork, we are pioneering a Software-Driven Fabric (SDF)-an intelligent abstraction layer between workloads and infrastructure-that observes, predicts, and controls in real time, dynamically aligning application requirements and fabric behavior. This is not just a technical breakthrough. It enables organizations to achieve more with the same infrastructure. FleetIQ will make AI more economically viable for the decade ahead.”
– Suresh Vasudevan, CEO, Clockwork
“As AI infrastructure scales to tens of thousands of GPUs for training and inference, the bottleneck has shifted from compute to communication. With accelerators running in lockstep, a single link flap, congestion spike or straggler can stall progress and crater utilization. The operational priority is utilizing real-time fabric visibility for faster fault isolation and recovery to keep workloads moving instead of looping through costly restarts. And as Mixture of Experts (MoE) models with high rank expert parallelism proliferate, the all-to-all exchange intensifies, raising the bar even higher for GPU communication efficiency.”
– Dylan Patel, Founder, CEO, and Chief Analyst, SemiAnalysis
FleetIQ improves overall cluster efficiency by extending end-to-end visibility and control across both CPU-driven front-end and GPU-powered back-end networks. This enables teams to run training, inference and user-facing applications concurrently on the same cluster, improving economics, shortening time-to-market, and simplifying operations. FleetIQ works across Ethernet, InfiniBand, and RoCE, supports heterogeneous GPU environments, and requires no proprietary hardware.
Clockwork’s impact is already being felt by enterprises like Uber:
“At Uber, we tackle real-time logistics problems where every millisecond matters-latency spikes don’t just hurt customer experience, they directly impact driver retention and revenue. In our tests across a hybrid, multi-cloud environment, Clockwork delivered significant coverage and accuracy improvements over networking observability. Their unique innovation can greatly help Uber expedite the detection and fault-localization of networking issues: from hours to minutes, which will greatly improve service tail latency and prevent noisy neighbor impact.
We are in the process of rolling out Clockwork across Uber infrastructure, and look forward to experiencing their full capabilities at Uber’s scale. Clockwork’s software-driven fabric provides foundational observability for the hybrid, multi-cloud environment, helping us deliver what matters most: improved infrastructure utilization, enhanced resiliency, and ultimately, a better experience for the millions of people who rely on our platform every day.”
– Albert Greenberg, Chief Architect Officer, Uber
A vendor-neutral fabric for neocloud and enterprise AI at scale
As countries invest in sovereign, sustainable AI infrastructure, FleetIQ provides a hardware-agnostic control layer that raises cluster reliability and availability, delivering faster service for providers and better experiences for end users-making Clockwork a strategic design partner for neoclouds and enterprises.
“We have been working with Clockwork to evaluate their software-driven fabric on our AI infrastructure, and seeing meaningful improvements in reliability. This is exactly what our customers need when running large-scale AI workloads where any disruption can be costly. We like how this approach works across different network configurations without requiring hardware lock-in. As we continue to scale our infrastructure, solutions that focus on the communication layer-which is often a bottleneck-are becoming increasingly important for delivering the performance and reliability that our customers expect.”
– Danila Shtan, CTO, Nebius
“At NScale, we are building the foundation for AI at planetary scale-making it faster, more efficient, and more resilient for the world’s most ambitious organizations. To do that, we seek partners who share our vision for redefining what’s possible. Clockwork’s approach aligns perfectly with ours, and together we’re creating an AI infrastructure that is not only powerful and reliable, but ready to support the most demanding innovations of the future.”
– David Power, CTO, NScale
“At WhiteFiber, Clockwork helps us deploy GPU clusters faster and with greater consistency. Their observability and rapid localization of fabric issues not only reduce deployment times but also validate the reliability of our infrastructure, ensuring clients’ AI workloads run on clusters built for performance, resilience and scale.”
– Tom Sanfillippo CTO, White Fiber
Other European validation includes DCAI, operator of Gefion, Denmark’s flagship AI supercomputer:
“Our mission at DCAI is to remove barriers to high-performance AI infrastructure-not only to serve researchers, startups, and enterprises today, but also to build the sovereign foundations of tomorrow’s innovation economy. Gefion is a game-changing resource driving breakthroughs in quantum computing, drug discovery, advanced weather forecasting and beyond. To succeed, we must deliver resilience, reliability and efficiency at an unprecedented scale-performance once reserved for hyperscalers. Partnering with Clockwork enables us to operate Gefion seamlessly and reliably, even as workloads and demands increase.
The result is a compute-efficient, fault-tolerant infrastructure that researchers and industries can trust-lowering costs, eliminating wasted GPU cycles, and helping us deliver a sovereign AI capability second to none.”
– Dr. Nadia Carlsten, CEO, DCAI
Notable industry validation
“At Broadcom, our focus has always been on delivering Ethernet-centric infrastructure that scales AI with both performance and efficiency. Clockwork’s software-driven fabric adds an essential layer of agility and observability that enhances the power of our silicon. With proactive fleet monitoring and seamless failover, Clockwork enables platforms such as our Tomahawk 6 and Jericho4 to realize their full potential in flexibility, uptime, and AI performance. Together, we’re driving open, adaptable fabrics that allow enterprises to build AI infrastructure that is resilient, high-performing, and future-ready.”
– Ram Velaga, Senior Vice President and General Manager, Core Switching Group, Broadcom
“MI350X series systems with ROCm software and Pollara NICs provide a strong foundation for performance and reliability in AI training and inference. As deployments expand, ecosystem innovation, such as Clockwork’s software-driven approach, adds complementary capabilities that help ensure efficiency and consistency at scale.”
– Vamsi Boppana, SVP, AI, AMD
Clockwork’s launch of FleetIQ is paired with seasoned leadership to scale the new category. Suresh Vasudevan joins as CEO, a trusted technology leader with a track record of category creation and IPO-scale growth. He built Nimble Storage from $0 to $500M in revenue and an IPO, grew Sysdig from $5M to over $100M in ARR and into a category leader in container and cloud security, and served as Chief Product Officer at NetApp. “I am excited Suresh has joined us as CEO. He brings an exceptional combination of go-to-market leadership and product building experience required to scale entirely new categories, positioning Clockwork to enter its next phase of hypergrowth-delivering enterprise-grade, scalable infrastructure that meets the demands of the next generation of AI workloads,” said Balaji Prabhakar.
The company has also appointed Joe Tarantino as Vice President of Worldwide Sales-a proven sales leader instrumental in scaling Cohesity’s growth who, most recently, served at GMI Cloud, a top 10 NVIDIA neocloud partner-underscoring Clockwork’s strategic value. “While at GMI Cloud, I witnessed the explosive growth of enterprise AI and how quickly customers were consuming GPUs,” said Tarantino. “Clockwork helps them accelerate those investments by optimizing performance and resilience, and by taking AI initiatives from prototype to production faster.”
To learn more about Clockwork and the FleetIQ Platform, visit www.clockwork.io.
About Clockwork
Clockwork is the Software-Driven Fabric company for AI and high-performance workloads. Its FleetIQ intelligence layer addresses AI’s core scaling bottleneck: communication between GPUs, clusters, and clouds. Positioned between workloads and infrastructure, FleetIQ observes, predicts, and controls in real time-maximizing GPU utilization and accelerating job completion. Delivered in pure software across heterogeneous networks, it transforms communication from the weakest link into a unified control plane that classifies flows by intent, steers around hot paths, and paces traffic to protect priority work-unlocking dramatically higher utilization. By turning idle silicon into productive intelligence, Clockwork enables enterprises, neoclouds, and hyperscalers to do more with the same GPUs-making AI faster, reliable, efficient, and sustainable. Companies including Uber, Wells Fargo, DCAI, Nebius, Nscale, and White Fiber trust Clockwork to power their most demanding workloads. Learn more at www.clockwork.io.
Media Contact
Dana Trismen
clockwork@unshakablemarketinggroup.com
SOURCE: Clockwork
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