Open networking for the AI era

Networking, rebuilt from first principles for large-scale AI.

KALIFAS designs open, high-performance networking silicon and systems for the world's largest AI clusters — turning the interconnect from the limit on AI into its advantage.

For a decade, progress in AI was told as a story about chips. But as models and clusters have grown, a different limit has surfaced — the network between the chips. A frontier training run asks tens of thousands of accelerators to behave as a single machine, exchanging gradients and activations in tight, synchronous bursts. When the fabric stalls, the most expensive silicon in the building waits.

That makes interconnect efficiency — not raw compute alone — a defining driver of AI performance and economics. KALIFAS treats networking as the principal bottleneck of this computing era, and rebuilds the stack from first principles to remove it.

The interconnect company

We are KALIFAS. We build the open interconnect that lets thousands of accelerators behave like one machine.

AI systems have always been measured by the chip. We believe the next decade is decided by what connects them. KALIFAS is rebuilding the networking stack — silicon, systems, and software — for the scale, density, and economics of modern AI.

KALIFAS · FX LINK · PWR KALIFAS · ETH
Purpose-built

Built for the next generation of AI clusters — where the fabric is the computer.

OPTICS
Pluggable optics
INTERCONNECT SILICON
Purpose-built silicon
LINK
Direct-attach links

As AI workloads outgrow the networks they run on, the interconnect has become the principal bottleneck of the computing era. KALIFAS rebuilds it end to end — silicon, systems, and software — so that scale stops being a tax on every job and starts being a capability you can buy.

Scale-up

A ground-up hardware architecture binds accelerators into a single, tightly-coupled domain at very large scale — high-radix, low-latency, coherent.

Scale-out

Open, heterogeneous Ethernet extends the fabric across racks, rows, and data halls — on proven switch silicon, without supplier lock-in.

Open

Every layer speaks open standards, so customers keep their choice of silicon, systems, and software — and the whole ecosystem grows.

01

Scale-Up Fabric

A ground-up interconnect architecture that binds accelerators into one machine — at very large scale.

Training and low-latency inference live or die on the scale-up domain: the tight, synchronous fabric where accelerators exchange gradients and activations as if they shared a backplane. KALIFAS designs this layer from the first transistor for AI traffic — high radix, low latency, and engineered so that adding nodes adds throughput instead of overhead.

  • Ground-up siliconAn interconnect architecture designed for AI from first principles, not adapted from general-purpose networking.
  • Very large domainsCouple thousands of accelerators into a single coherent fabric, so the cluster behaves like one computer.
  • Latency that holds under loadTuned for the bursty, collective communication patterns of modern training and serving.
  • Open at the edgesNo proprietary island — the scale-up domain meets the rest of the data center on open interfaces.
Explore Scale-Up
SCALE-UP DOMAIN high radix GPU GPU GPU GPU GPU GPU GPU GPU KALIFAS switch
02

Scale-Out Ethernet

Open, heterogeneous scale-out for clusters that span racks, rows, and data halls.

Beyond the scale-up domain, AI clusters keep growing — across rows and across buildings. KALIFAS extends the fabric on open, standards-based Ethernet, building on a major vendor's proven switch silicon so operators reach hyperscale without betting the cluster on a single supplier or a closed stack.

  • Standards-based EthernetScale out on the most open, widely-supported fabric in the industry — the foundation operators already trust.
  • Heterogeneous by designMix accelerators, generations, and vendors inside one cluster instead of one captive supply chain.
  • Built on proven siliconLeverages a leading vendor's Ethernet switch ASICs for scale-out reach and ecosystem maturity.
  • One operational modelScale-up and scale-out managed as a single, coherent network — not two stacks bolted together.
Explore Scale-Out
SCALE-OUT · ETHERNET SPINE LEAF
03

Open by Standard

Built on open standards, not proprietary lock-in — and helping write the ones the whole industry can build on.

The fastest way to slow an industry is to fence it. KALIFAS takes the opposite bet: as an active member of the open-standards consortiums shaping AI-era interconnect and open network operating systems, we help define interfaces anyone can build to — prioritizing openness, interoperability, choice, and performance. Open posture isn't charity; it's how the market for AI networking gets big enough for everyone.

  • A seat at the tableActively shaping the open standards for AI interconnect and network operating systems, not just adopting them.
  • Interoperability firstOpen interfaces keep your choice of silicon, systems, and software intact — no captive components.
  • An ecosystem, not an islandDesigned to grow the market for AI networking rather than trap a slice of it behind a moat.
  • Performance without compromiseOpen doesn't mean slow — the standards we back are engineered for AI traffic from the start.
Explore Open Standards
Open interface interoperable · vendor-neutral
One open stack

Open, turnkey, and built to remove complexity. From silicon to operations, delivered as one system.

Standing up large-scale AI networking has meant integrating a dozen vendors and praying the seams hold. KALIFAS ships the whole stack as a coherent, turnkey solution — so scaling AI is something enterprises can buy, not only something hyperscalers can build.

Purpose-built interconnect silicon for the scale-up domain, paired with proven Ethernet switch silicon for scale-out. One portfolio covers both halves of the cluster, engineered for the bandwidth, radix, and latency that AI traffic demands.

Complete, integrated networking systems — not a bag of parts. Switches, optics, and cabling are engineered and validated together so the fabric behaves predictably the day it is racked, and as it grows.

Open network operating software with open interfaces, so the fabric is programmable, observable, and yours to control. No closed firmware deciding how your most valuable workloads get to run.

Turnkey deployment and deep, link-level visibility — so a large-scale fabric is something you run with confidence, not something you wrestle. See utilization, health, and collective traffic across scale-up and scale-out from one place.

Every layer speaks open standards, so nothing about your network is captive to a single vendor. You keep the freedom to mix, extend, and replace — the opposite of proprietary lock-in.

Open interfaces Network OS Systems Silicon
Built for scale

Architected for the scale of the AI era. Every product, engineered to grow.

FABRIC

Who it's for

The operators of large-scale AI infrastructure — hyperscalers standing up the next generation of clusters, and enterprises evaluating networking where scalability is the leading priority. Wherever the fabric is the limit, KALIFAS is built to remove it.

The opportunity

~$100B

Industry analysts project the market for AI networking to approach $100 billion in annual value by the end of the decade — as interconnect, not compute alone, becomes the defining constraint on AI at scale.

Where we sit

KALIFAS is an early entrant building open, high-performance networking silicon and systems for modern AI clusters — backed by a range of technology-focused and strategic investors who share the thesis that the network is the next frontier of AI.

Let's build

Let's talk. We'd love to hear what you're building.

Whether you're standing up your first large-scale cluster or rethinking the network behind an existing fleet, the KALIFAS team is ready to dig into the details with you. Tell us about your fabric and we'll follow up.

Please enter your name.
Please enter a valid email address.
Please tell us where you're writing from.
What are you interested in? (optional)
Please add a short message.

Submitting opens your email client addressed to hello@kalifas.app. Prefer email? Reach us there directly.

Thanks — your message is ready to send.

We've opened your email client with the details prefilled. Send it our way and the KALIFAS team will be in touch shortly. If nothing opened, email us directly at hello@kalifas.app.