Quside Quantum Entropy: The Platform and Where It Fits
Quside is a quantum randomness company whose portfolio runs from a chip you embed in a device to an appliance that serves entropy across your estate over an API. C4C works with Quside, and this guide is a practical tour of what it makes, what stands out, where each product fits, and where it earns its place versus where it does not.
Most quantum security vendors sell a box that produces random numbers and ask you to trust the physics. Quside's pitch is different in a way that matters: verifiable entropy with observability. It does not only generate quantum randomness, it continuously measures the quality of what it produces and lets you see it, and it backs that with formal certification. For anyone who has understood why weak randomness is dangerous precisely because it is invisible, that is the right emphasis. This guide walks the portfolio and where each part fits. If you want the underlying argument first, start with our QRNG explainer.
Quside spans two pillars: quantum entropy for cybersecurity, and hardware acceleration for randomness heavy compute. The security portfolio runs from embedded chips, through server cards, to Entropy Core, an appliance that delivers entropy to many applications over a simple API. Its differentiators are verifiable, monitored randomness and real certification, NIST SP 800-90B among them. For most organisations, Entropy Core is the natural entry point. Pricing is quote led, so scoping matters.
What Quside is
Quside is best understood as a quantum randomness platform with two commercial pillars. The first is cybersecurity entropy: generating genuinely unpredictable random numbers for cryptographic use. The second is compute acceleration: using randomness processing hardware to speed up workloads that lean heavily on random numbers, such as simulation and optimisation. The common thread across both is not simply that the randomness is quantum, it is that Quside foregrounds measurable quality, runtime monitoring and standards certification rather than asking you to take true randomness on faith. That is the through line to hold on to as the product names go by.
The portfolio, from chip to cloud
The security range is best read as layers, each shaped for a different place in a system.
- Ruby, the embedded chips. The quantum entropy source itself, for building directly into a device. Ruby N1 is the higher performance core, supporting designs from 100 Mb/s up to 1 Gb/s and certified to NIST SP 800-90B, while Ruby S1 is a smaller footprint option up to 50 Mb/s for constrained, board level integration. This is the OEM and design in layer, for makers who want security engineered into a product rather than added later. Quside has also announced a newer embedded module, Onyx S1, built around the Ruby S1 chip, though public detail on it is still limited.
- Nellite, the FPGA modules. QRNG in the FMC and FMC+ form factor for FPGA environments, supplied with the IP cores needed to control, monitor and post process the randomness. The family includes the FMC400 at 400 Mb/s and the Plus A41 up to 1 Gb/s, with compatibility across common Xilinx FPGA families. This is the layer for advanced system builders in defence, telecom and specialised cryptographic platforms.
- Garnet, the PCIe cards. Quantum entropy for standard servers and workstations, installed like any other card, with drivers, firmware and runtime observability. Options run from 100 Mb/s to 1 Gb/s, including a full size PCIE 400 at 400 Mb/s and low profile variants. This is the most accessible way to put verifiable quantum entropy into ordinary infrastructure.
- Entropy Core, the appliance and service layer. Rather than attach a card to every host, Entropy Core centralises quantum entropy and serves it to many applications over an API. This is the product most organisations should look at first, and it has its own section below.
- RPU One and RPU Cloud, the compute accelerators. A different pillar, aimed at speeding up randomness intensive workloads rather than at cryptography. Covered briefly further down, because the buyer is usually a different team.
Entropy Core: the natural entry point
For most buyers, Entropy Core is where the story becomes practical. It turns quantum randomness into a consumable enterprise service. Applications, cryptographic systems, virtualised and containerised services and IoT estates draw high quality entropy from it over a standard interface, rather than each depending on its own hardware. Quside documents it as both a physical 1RU appliance and a virtual appliance, exposing a REST HTTP API, support for the QRNG Open API framework, JSON or binary responses, and administration and monitoring functions including agents for common monitoring stacks. Security is handled with modern transport, TLS 1.3 and optional mutual authentication. For reach beyond a single site, it supports private network delivery through Equinix Fabric and connectivity to AWS. The service oriented variants delivered through Equinix and AWS are billed by the bandwidth consumed on a monthly basis, which makes entropy something you can meter and govern like any other utility.
What makes it credible
Quantum security has a reputation for science projects, so the evidence matters. Quside's is unusually strong for a company at its stage. Its photonic quantum entropy sources are certified to NIST SP 800-90B, the recognised standard for entropy sources. Its Garnet and Nellite series have achieved Spain's ENS qualification at level High, which matters for public sector and regulated buyers. It holds ISO 9001 quality certification. And it has real, documented integrations with the systems where keys are actually made and managed, including Thales Luna HSMs, Keyfactor for certificate lifecycle, and PQShield for post quantum algorithms in OpenSSL environments, alongside a broader ecosystem that includes Equinix and others. That integration practicality is what lowers the risk of adoption, and it is covered from the buyer's angle in our guide to quantum entropy and post quantum readiness.
The compute side, briefly
Quside's second pillar, the RPU line, is a genuinely different proposition and usually a different buyer. RPU One is a PCIe accelerator marketed at 10 Gbit/s, and RPU Cloud is delivered as a marketplace image on AWS accelerated instances at 60 Gbit/s. Both target workloads where randomness is part of the algorithm itself: Monte Carlo simulation, optimisation, prediction, quantitative finance, and signal processing such as 5G equalisation. If your organisation runs measurable stochastic workloads and cares about their speed and cost, the RPU line is worth a benchmark led conversation. If you are here for cryptographic entropy, it is a separate track and not a prerequisite. Note that Quside's own performance figures for these workloads are vendor case studies rather than independent benchmarks, so they are best treated as evidence to test against your own workload, not as guarantees.
Where it fits, and where to think twice
Being straight about this makes the rest more credible. Quantum entropy is not a universal upgrade that every system needs tomorrow. A well designed application on a modern, properly seeded operating system is in reasonable shape for a lot of everyday work, and for those systems a QRNG is a refinement rather than a fix. Quside earns its place where the stakes and the constraints change: high value and regulated environments that must evidence the quality of their randomness, long lived data and devices whose secrets must stay safe for years, embedded and edge systems that generate keys in constrained conditions where good entropy is hardest to obtain, and organisations getting serious about post quantum readiness. In those settings, verifiable, certified, centrally delivered entropy is a real strengthening of the foundation. Outside them, it is worth planning for rather than rushing.
One honest note on commercials. Quside does not publish list prices for its hardware, and its public partner programme is lightly specified. Entropy Core's cloud and private connectivity variants are billed by usage, but most of the range is quote led. That is normal for this category, and it is exactly why scoping the right product to the right problem is where the value is, rather than buying a box and hoping it fits.
How C4C helps
Our role is to make this practical and honest. We start with an assessment of where your keys and secrets come from today, which of them protect data or devices that must stay safe for years, and where your entropy is genuinely weak. From there we match the right part of the Quside portfolio to the problem, whether that is embedded Ruby for a product design, Garnet or Nellite for specific hosts, or, most often, Entropy Core as a governed entropy service across the estate. We scope the commercials, design the integration into your HSM, PKI and application cryptography, run a proof of concept, and support the move to production. Because we are consultative rather than box led, the honest answer sometimes is that entropy is a plan for next year, not a purchase for today. You can also read more about the partnership on our C4C and Quside announcement.
A short entropy assessment is worth far more than a product demo. Mapping where you generate keys, what must stay secret for years, and how strong your randomness is today tells you which Quside product, if any, earns its place now, and where it would simply be premature.
Want to explore Quside for your estate?
C4C assesses your entropy exposure, scopes the right Quside product to the problem, and designs and deploys it into your cryptographic systems. From embedded chips to Entropy Core as a service, we make quantum grade randomness practical rather than a science project.
Prefer email? Reach us directly at hello@c4cgroup.co.uk.
Frequently asked questions
What is Quside?
Quside is a quantum randomness platform company with two pillars: quantum entropy products for cybersecurity, and hardware acceleration products for randomness intensive compute. Its distinguishing emphasis is verifiable entropy with observability, meaning it continuously measures the quality of the randomness it produces and backs it with formal certification, rather than only claiming true randomness.
What products does Quside make?
On the security side, Quside makes the Ruby embedded chips, the Nellite FPGA modules, the Garnet PCIe cards, and Entropy Core, an appliance that delivers entropy to many applications over an API. On the compute side, it makes the RPU One accelerator card and the cloud delivered RPU Cloud. Together they span chip, module, appliance, API and cloud, so the entropy source can be matched to where it is needed.
What is Quside Entropy Core?
Entropy Core is Quside's enterprise entropy service. Instead of attaching a QRNG to every host, it centralises quantum randomness and serves it to applications, cryptographic systems, virtualised services and IoT estates over a REST API, with support for the QRNG Open API framework, monitoring, TLS 1.3 and optional mutual authentication. It comes as a physical or virtual appliance, with private network and cloud delivery options. For most organisations it is the natural entry point.
Is Quside certified?
Yes. Quside's photonic quantum entropy sources are certified to NIST SP 800-90B, the recognised standard for entropy sources. Its Garnet and Nellite series have achieved Spain's ENS qualification at level High, and the company holds ISO 9001 quality certification. That certification posture is a large part of why it suits regulated and security sensitive environments.
What does Quside integrate with?
Quside has documented integrations with the systems where keys are generated and managed, including Thales Luna hardware security modules, Keyfactor for PKI and certificate lifecycle, and PQShield for post quantum algorithms in OpenSSL 3.2 and above. It also supports common interfaces such as PKCS#11 and toolchains including Bouncy Castle and EJBCA, and offers private connectivity through Equinix Fabric and delivery via AWS.
How much does Quside cost?
Quside does not publish list prices for most of its hardware, so pricing is quote led and depends on the product and deployment. The exception is Entropy Core delivered through Equinix or AWS, which is billed by the bandwidth consumed on a monthly basis. C4C scopes the right product to your requirement and handles the commercials, which is where matching the product to the problem earns its value.