Silicon Quantum Computing
Silicon Quantum Computing is a Sydney-based quantum computing company that builds atomic-precision phosphorus-in-silicon processors, selling quantum hardware, simulators, and quantum machine learning systems to enterprise and government clients in telecommunications, defense, financial services, energy, and materials science.
- Company typePrivate
- Founded2017
- HeadquartersSydney, Australia
- Headcount101–250
- GTM typeB2B
- OfferingHardware or Manufacturing
What Silicon Quantum Computing does
Silicon Quantum Computing (SQC) is an Australian private company founded in 2017 at UNSW Sydney by physicist Michelle Simmons to commercialize atomic-precision silicon quantum computing technology developed over 25+ years at the Centre of Excellence for Quantum Computation and Communication Technology. SQC manufactures quantum processors using phosphorus atoms precision-placed in isotopically enriched silicon-28 via its proprietary PAQMan (Precision Atom Qubit Manufacturing) process, achieving 0.13 nm positioning accuracy, 99.99% single-qubit gate fidelities, 99.95% two-qubit gate fidelities, 0.8 ns two-qubit gate speeds, and chip iteration cycles under one week. The company holds 200+ patents and 250+ refereed publications, and was selected for Stage B of DARPA's Quantum Benchmarking Initiative in November 2025.
SQC sells a portfolio of products based on its 14|15 platform: Watermelon, a quantum feature generator that augments classical machine learning workflows (demonstrated with Telstra for network performance forecasting); Quantum Twins, an application-specific quantum simulator with 15,000 qubit registers for materials and chemistry discovery (launched February 2026 with Nature publication); and Jalapeño 1, an upcoming gate-based quantum processor. Products are delivered via direct enterprise contracts, the SQC Cloud self-serve channel, and on-premise cryogenic deployments. The company is also building US manufacturing capability through a partnership with SkyWater Technology (announced November 2025).
SQC's commercial focus targets telecommunications, defense, financial services, energy and utilities, and government customers via enterprise field sales, with named customers including Telstra, Australian Defence, Transport for NSW, and undisclosed financial services and energy utility organizations. The business is capital-intensive and pre-fault-tolerant, with approximately $300M of cumulative investment including a $50.4M AUD Series A in July 2023 at a $195.3M valuation, $60M AUD of National Reconstruction Fund Corporation sovereign investment through 2026, and a SAFE note from Firgun Ventures. SQC's stated objective is to deliver a commercial-scale, fault-tolerant silicon quantum computer by 2033, aligned with the DARPA QBI utility-scale goal.
Silicon Quantum Computing firmographics
Firmographics- Name
- Silicon Quantum Computing
- Legal name
- Silicon Quantum Computing Pty Limited
- Website
- https://sqc.com.au
- Company type
- Private
- Founded year
- 2017
- Operating status
- Operating
- Headcount range
- 101–250 employees
- Short description
- Silicon Quantum Computing is a Sydney-based quantum computing company that builds atomic-precision phosphorus-in-silicon processors, selling quantum hardware, simulators, and quantum machine learning systems to enterprise and government clients in telecommunications, defense, financial services, energy, and materials science.
- Ownership category
- akta.pro rank
Silicon Quantum Computing industry classification
Industry- Product category
- Quantum Computing Hardware
- NAICS
- Semiconductor and Related Device Manufacturing (334413), Research and Development in Nanotechnology (541713)
- SIC
- Semiconductors & Related Devices (3674)
- akta.pro primary industry
- Spin QPU Systems (Silicon/Quantum Dots/Donors) (HDAGAAAE)
- akta.pro secondary industries
- Quantum Cloud Infrastructure & QPU Hosting (HDAGAIAA), Quantum Materials, Qubits & Device Physics Research (HDAGAMAA), Quantum Control, Cryogenics & Measurement Research (HDAGAMAC)
Keywords
Where Silicon Quantum Computing is headquartered
LocationHeadquarters
- HQ city
- Sydney
- HQ country
- Australia
- HQ region
- Oceania
Offices1 record
Markets served
Silicon Quantum Computing business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Personnel, Technology or R&D, Infrastructure, Operations, Marketing or Sales, Supply Chain
Revenue model
- Quantum Hardware and Software Products: Sale of quantum processors, quantum simulators, and quantum machine learning systems. Products include Watermelon (quantum ML), Quantum Twins (quantum simulation), and Jalapeño 1 (gate-based processor). Available via on-premise deployment or SQC Cloud.
- Quantum Computing Services: Cloud-based access to quantum computing capabilities for customers unable or unwilling to deploy on-premise systems.
Go-to-market motion2 records
Distribution channels3 records
Marketing channels4 records
Silicon Quantum Computing product offering
Product offeringCore offering
Silicon Quantum Computing (SQC) designs, manufactures, and sells silicon-based quantum processors built from phosphorus atoms precision-placed in isotopically pure silicon-28. Its commercial offerings include Watermelon, a quantum feature generator for classical machine learning workflows, and Quantum Twins, an application-specific quantum analogue simulator for chemicals and materials discovery, with products delivered via direct enterprise contracts, SQC Cloud, or on-premise hardware deployments.
Product overview
Silicon Quantum Computing (SQC) offers a portfolio of quantum computing products based on its proprietary 14|15 Platform™ technology. The platform uses phosphorus atoms precision-placed in pure silicon to create the world's highest quality quantum computing processors. Two products are currently available: Watermelon™ provides quantum-enhanced AI capabilities as a feature generator for classical machine learning workflows, while Quantum Twins™ offers quantum analogue simulation for materials and chemistry discovery. A third product, Jalapeño 1 (gate-based processor), is under development. All products are accessible via SQC Cloud and on-premise hardware deployments.
Differentiator
Problem solved
Functional benefit
Brands
- Watermelon™: A quantum-enhanced AI system for classical machine learning workflows, delivering quantum machine learning capabilities to telecommunications, defense, and financial services sectors
- Quantum Twins™
- 14|15™
- PAQMan™
Products and services
- Watermelon A quantum feature generator for classical machine learning workflows that delivers quantum-enhanced AI capabilities to enterprises, reducing model training time from weeks to days while maintaining accuracy. Designed for enterprise customers in telecommunications, defense, and financial services sectors.
- Quantum Twins An application-specific quantum analogue simulator that creates custom chips encoding physical systems and chemical interactions. Features 15,000 qubit registers patterned on pure silicon at 0.13 nanometer atomic precision, enabling simulation of quantum systems beyond the reach of classical computers. Targets materials discovery, superconductivity analysis, and novel information storage.
- Jalapeño 1 A gate-based quantum processor designed for experimentation and advancement as part of SQC's roadmap toward commercial-scale error-corrected quantum computing. Currently in development.
Quantifiable outcome
- Watermelon system trains AI models in days matching accuracy of deep learning models requiring weeks
- +4 more outcomes
Companies that use Silicon Quantum Computing
Customer profileNamed customers5 records
Segments5 records
Ideal customer profiles5 records
Silicon Quantum Computing technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
AI capability4 records
Feature5 records
Silicon Quantum Computing partnerships and signals
Strategic signalPartnerships
Seven partnerships are on record, tiered core, flagship and minor.
- SkyWater TechnologycoreJoint program to accelerate commercialization of hybrid quantum-classical computing. SkyWater manufactures quantum processors and components in US-based facilities for performance, scalability, and security.
- Telstraflagship12-month collaboration demonstrated Watermelon quantum reservoir system for network performance forecasting. Telstra reported dramatic reduction in model training times using SQC's quantum processor. Telstra is also a foundation investor in SQC.
- AMDcoreSQC leverages AMD technology across full stack: from qubit control and readout to simulation and modelling. Uses AMD FPGAs and Ryzen Threadripper clusters for quantum-classical computing integration. Case study published by AMD highlighting the collaboration.
- UNSW SydneyflagshipSQC was founded as a spinout from UNSW's Centre of Excellence for Quantum Computation and Communication Technology (CQC2T). Company headquartered at UNSW Sydney. Deep ongoing research collaboration.
- Australian DefenceflagshipStrategic partnership to deliver quantum machine learning for defense applications. Funded by Defence Trailblazer program.
- Silex Systems LimitedcoreSupply partnership for isotopically pure silicon-28 (Si-28) material essential for qubit manufacturing. Supported by Defence Trailblazer program.
- Transport for NSWminorSupplier agreement for logistics modelling using quantum computing to optimize Sydney's transport network.
Scale indicators9 records
Recent moves6 records
Expansion highlights6 records
Silicon Quantum Computing competitors and assessment
Company assessmentDirect peers
- Intel: Intel is pursuing silicon spin qubits fabricated on CMOS-compatible processes — directly comparable to SQC's silicon-phosphorus donor approach in both materials and qubit modality.
- Quantum Motion: UK-based silicon spin qubit company using CMOS-foundry-compatible processes to build quantum processors — directly comparable to SQC on silicon-spin modality and was a Firgun Ventures portfolio peer.
- Diraq: Australian silicon quantum computing spinout from UNSW pursuing silicon spin qubits in CMOS-foundry processes — directly comparable on modality, geography, and academic lineage (SQC's founder Michelle Simmons is also a co-founder).
Broad incumbents
- IBM Quantum: Operates a broad quantum hardware/software/cloud stack on superconducting qubits; competes with SQC for enterprise quantum-computing budgets but does not specialize in silicon spin.
- Google Quantum AI: Leader in superconducting qubit quantum computing and a primary participant in DARPA QBI; competes with SQC for the same utility-scale fault-tolerance milestone.
- IonQ: Public pure-play quantum hardware company using trapped-ion modality; competes with SQC for enterprise quantum-computing customers and cloud distribution deals.
- PsiQuantum: Well-capitalized photonic quantum computing company pursuing utility-scale fault tolerance; competes with SQC as a peer in DARPA QBI Stage B and for similar enterprise/government customers.
- Rigetti Computing: Public superconducting qubit quantum computing company offering cloud access via Rigetti QCS; competes with SQC Cloud for enterprise hybrid-quantum workloads.
Emerging players
- Oxford Quantum Circuits (OQC): UK-based superconducting qubit quantum computing company offering enterprise cloud access; a Firgun Ventures portfolio peer and competing for European enterprise customers similar to SQC's Telstra/TfNSW-style deployments.
- Photonic Inc: Photonic quantum computing company co-developing distributed quantum computing; a Firgun Ventures portfolio peer and Stage B DARPA QBI peer to SQC.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks7 records
Key highlights7 records
Customer concentration
Silicon Quantum Computing social profiles
Digital presenceSilicon Quantum Computing financial estimates
Financial estimateRevenue estimate
Valuation estimate
Silicon Quantum Computing leadership team
Management profileNumber of profiles
Profiles12 records
Silicon Quantum Computing funding detail
Funding detailFunding overview
Funding rounds3 records
Investors6 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Silicon Quantum Computing M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Silicon Quantum Computing
What does Silicon Quantum Computing do?
Silicon Quantum Computing (SQC) designs, manufactures, and sells silicon-based quantum processors built from phosphorus atoms precision-placed in isotopically pure silicon-28. Its commercial offerings include Watermelon, a quantum feature generator for classical machine learning workflows, and Quantum Twins, an application-specific quantum analogue simulator for chemicals and materials discovery, with products delivered via direct enterprise contracts, SQC Cloud, or on-premise hardware deployments.
Is Silicon Quantum Computing a public or private company?
Silicon Quantum Computing is a private company. It is classified as venture growth investor backed and is currently operating.
When was Silicon Quantum Computing founded?
Silicon Quantum Computing was founded in 2017. It employs 101 to 250 people.
Where is Silicon Quantum Computing based?
Silicon Quantum Computing is headquartered in Sydney, Australia, in the Oceania region.
How does Silicon Quantum Computing make money?
Two revenue lines are on record. Quantum Hardware and Software Products are the primary driver. The others are quantum Computing Services.
Who are Silicon Quantum Computing's main competitors?
Direct peers on record are Intel, Quantum Motion and Diraq. Broad incumbents are IBM Quantum, Google Quantum AI, IonQ, PsiQuantum and Rigetti Computing. Emerging players are Oxford Quantum Circuits (OQC) and Photonic Inc.
Does Silicon Quantum Computing have an API?
No public API is recorded for Silicon Quantum Computing.
What industry is Silicon Quantum Computing in?
Silicon Quantum Computing's product category is Quantum Computing Hardware. Its primary akta.pro industry code is HDAGAAAE, Spin QPU Systems (Silicon/Quantum Dots/Donors), with a secondary code of HDAGAIAA, Quantum Cloud Infrastructure & QPU Hosting. Its NAICS code is 334413 and its SIC code is 3674.