Iceberg Quantum
Iceberg Quantum designs fault-tolerant quantum computing architectures based on LDPC codes, reducing quantum error-correction hardware overhead by over an order of magnitude. The Sydney-based company licenses its architectures and partners with quantum hardware firms including PsiQuantum, Oxford Ionics, and Diraq.
- Company typePrivate
- Founded2025
- HeadquartersSydney, Australia
- Headcount11–50
- GTM typeB2B
- OfferingSoftware
What Iceberg Quantum does
Iceberg Quantum is a quantum computing architecture company founded in March 2025 and headquartered in Sydney, Australia. The company designs fault-tolerant quantum computing architectures based on Low-Density Parity-Check (LDPC) codes, which reduce the hardware overhead required for quantum error correction by over an order of magnitude compared to the predominant surface code approach. Its flagship product, the Pinnacle Architecture (released February 2026), demonstrates that factoring RSA-2048 can be achieved with fewer than 100,000 physical qubits rather than the millions previously estimated under surface-code assumptions. The company also publishes research on complementary fault-tolerance techniques including Fast Surgery (15–30x speedup for useful quantum algorithms) and Modular and Efficient Surgery (reusable gadgets for LDPC code surgery).
Iceberg Quantum serves B2B customers exclusively, partnering with leading quantum hardware companies — including PsiQuantum (photonic), Oxford Ionics (trapped-ion), and Diraq (silicon spin qubits) — to integrate its LDPC-based fault-tolerant designs onto diverse hardware platforms. Revenue is generated through architecture licensing and research/design partnerships rather than product sales; pricing is negotiated per engagement and not publicly disclosed. The company's team consists of approximately 16 members, including three co-founder PhD graduates in fault tolerance (Felix Thomsen, CEO; Larry Cohen, CSO; Samuel Smith, CTO) and advisor Stephen Bartlett.
The company has raised $8 million in venture funding to date: a $2 million pre-seed round in March 2025 (led by Blackbird, with LocalGlobe) and a $6 million seed round in February 2026 (LocalGlobe, Blackbird, DCVC). It is actively expanding, with planned offices in Berlin and the United States to support its hardware-company partnerships across photonic, trapped-ion, and silicon-spin qubit modalities.
Iceberg Quantum firmographics
Firmographics- Name
- Iceberg Quantum
- Legal name
- Iceberg Quantum
- Website
- https://iceberg-quantum.com
- Company type
- Private
- Founded year
- 2025
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- Iceberg Quantum designs fault-tolerant quantum computing architectures based on LDPC codes, reducing quantum error-correction hardware overhead by over an order of magnitude. The Sydney-based company licenses its architectures and partners with quantum hardware firms including PsiQuantum, Oxford Ionics, and Diraq.
- Ownership category
- akta.pro rank
Iceberg Quantum industry classification
Industry- Product category
- Quantum Computing Architecture
- NAICS
- Computer Systems Design and Related Services (5415), Computer Systems Design and Related Services (54151)
- SIC
- Services-Computer Programming Services (7371)
- akta.pro primary industry
- Fault-Tolerant Architectures & Resource Estimation (overhead, layout, scheduling) (HDAGAJAF)
- akta.pro secondary industries
- Fault-Tolerant Gate Sets & Logical Operations (transversal, lattice surgery, magic-state) (HDAGAJAB), Quantum Error Correction, Fault Tolerance & Quantum Information Theory (HDAGAMAD)
Keywords
Where Iceberg Quantum is headquartered
LocationHeadquarters
- HQ city
- Sydney
- HQ country
- Australia
- HQ region
- Oceania
Offices3 records
Markets served
Iceberg Quantum business model
Business model- GTM type
- B2B
- Offering type
- Software
- Cost components
- Personnel, Technology or R&D, Operations
Revenue model
- Architecture Licensing and Research Partnerships: Iceberg Quantum generates revenue through licensing its fault-tolerant architectures to quantum hardware companies and through research and design partnerships with leading hardware companies. The company provides LDPC-based architectures as core enabling technology for quantum computing platforms.
Go-to-market motion1 record
Distribution channels1 record
Marketing channels4 records
Iceberg Quantum product offering
Product offeringCore offering
Iceberg Quantum designs and licenses fault-tolerant quantum computing architectures built on Low-Density Parity-Check (LDPC) codes. Its flagship Pinnacle Architecture and supporting techniques (Fast Surgery, Modular and Efficient Surgery) reduce the physical qubit overhead of quantum error correction by more than an order of magnitude compared to surface code approaches, enabling cryptographically relevant quantum computing with fewer than 100,000 physical qubits. The company delivers these architectures to quantum hardware vendors through research and design partnerships.
Product overview
Iceberg Quantum is a quantum architecture company that designs fault-tolerant architectures based on LDPC (low-density parity-check) codes to reduce the hardware overhead for quantum error correction by over an order of magnitude. Their flagship product is the Pinnacle Architecture, which validates their thesis that architectures can achieve 10x lower overhead compared to traditional surface code approaches. The company also offers research innovations including Fast Surgery and Modular and Efficient Surgery, which provide complementary methods for reducing both time and space overhead in fault-tolerant quantum computation. Iceberg Quantum partners with hardware companies including PsiQuantum, Diraq, and Oxford Ionics to integrate their fault-tolerant designs across different quantum computing platforms.
Differentiator
Problem solved
Functional benefit
Products and services
- Pinnacle Architecture Flagship fault-tolerant quantum computing architecture based on LDPC codes that reduces the hardware overhead of quantum error correction by over an order of magnitude. Uses modular processing units, magic engines, and memory blocks to enable cryptographically relevant quantum computing. Designed for integration with partner quantum hardware platforms (photonic, trapped-ion, silicon spin qubits).
- Fast Surgery Method for compressing time overhead in fault-tolerant quantum computing that extracts reliable logical measurements in a single round instead of multiple repetitions, transforming time redundancy into spatial redundancy. Achieves 15-30x speedup for useful quantum algorithms on LDPC-encoded hardware.
- Modular and Efficient Surgery Code surgery framework providing a small set of reusable gadgets that can measure any logical operator on LDPC codes in a single logical measurement cycle. Achieves order-of-magnitude spacetime reductions over surface code lattice surgery while delivering both modularity and efficiency.
Quantifiable outcome
- RSA-2048 factoring can now be achieved with fewer than 100,000 physical qubits instead of 1 million+ previously estimated
- +2 more outcomes
Companies that use Iceberg Quantum
Customer profileSegments1 record
Ideal customer profiles1 record
Iceberg Quantum technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature3 records
Iceberg Quantum partnerships and signals
Strategic signalPartnerships
Three partnerships are on record, tiered core.
- DiraqcoreIceberg Quantum is applying its LDPC-based approach to fault tolerance to help accelerate Diraq's roadmap to utility-scale quantum computing using silicon spin qubit hardware.
- Oxford IonicscoreIceberg Quantum is developing the architecture for Oxford Ionics' LDPC-based utility-scale trapped-ion quantum computing system. This partnership validates Iceberg Quantum's approach and helps shape the architecture of the first truly useful quantum computers.
- PsiQuantumcoreIceberg Quantum partnered with PsiQuantum as their first major partnership. The collaboration applies LDPC-based architectures to PsiQuantum's photonic platform to create a more efficient path to useful quantum computing. PsiQuantum has made a bold bet on photonics while taking a fault-tolerance-first approach from day one.
Scale indicators5 records
Recent moves7 records
Expansion highlights6 records
Iceberg Quantum competitors and assessment
Company assessmentEmerging players
- Diraq: Silicon spin qubit quantum hardware company partnering with Iceberg to apply LDPC fault tolerance to its roadmap. Comparable as a leading quantum hardware platform that is integrating Iceberg's architecture designs.
- QuEra Computing: Neutral atom quantum computing company pursuing utility-scale fault-tolerant systems. Comparable as an emerging modality player also working toward FTQC architectures, with potential overlap in target partner and customer ecosystem.
- PsiQuantum: Photonic quantum computing hardware company building utility-scale systems and Iceberg's first major partner. Comparable as they pursue fault-tolerant-first architectures but operate as a hardware company rather than architecture licensor.
- Oxford Ionics: Trapped-ion quantum hardware company partnering with Iceberg on LDPC-based fault-tolerant architecture. Comparable as a leading hardware platform that integrates Iceberg's architecture designs.
Broad incumbents
- Google Quantum AI: Google's quantum computing division, pioneer of surface code error correction at scale and demonstrator of below-threshold logical qubits. Comparable as a deep-pocketed incumbent whose architecture and engineering choices compete with LDPC approaches.
- Quantinuum: Major trapped-ion quantum computing company (Honeywell/Cambridge Quantum merger) pursuing utility-scale systems. Comparable as a broad FTQC incumbent that develops its own architectures and competes for the same hardware partner talent and customer attention.
- IBM Quantum: Industry-leading quantum computing division pursuing large-scale fault-tolerant systems using surface code. Comparable as the dominant incumbent whose architecture choices set industry standards and whose roadmap investments shape the fault-tolerance landscape.
Others
- Quantum Machines: Provider of quantum control systems and orchestration software used across quantum hardware platforms. Comparable as an adjacent enabling technology vendor that could integrate with or compete against Iceberg's architecture stack at the runtime/control layer.
Direct peers
- Riverlane: UK-based quantum error correction company building the operating system and decoding stack for fault-tolerant quantum computing. Most direct comparable as both companies sell QEC software/architectures to quantum hardware vendors rather than building hardware themselves.
- Alice & Bob: French fault-tolerant quantum computing company pursuing a specific architecture (cat codes) rather than surface code. Comparable as a dedicated architecture-focused FTQC company targeting utility-scale systems with proprietary error correction approaches.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat4 records
Key risks6 records
Key highlights6 records
Customer concentration
Iceberg Quantum social profiles
Digital presenceIceberg Quantum financial estimates
Financial estimateRevenue estimate
Valuation estimate
Iceberg Quantum leadership team
Management profileNumber of profiles
Profiles4 records
Iceberg Quantum funding detail
Funding detailFunding overview
Funding rounds2 records
Investors3 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Iceberg Quantum 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 Iceberg Quantum
What does Iceberg Quantum do?
Iceberg Quantum designs and licenses fault-tolerant quantum computing architectures built on Low-Density Parity-Check (LDPC) codes. Its flagship Pinnacle Architecture and supporting techniques (Fast Surgery, Modular and Efficient Surgery) reduce the physical qubit overhead of quantum error correction by more than an order of magnitude compared to surface code approaches, enabling cryptographically relevant quantum computing with fewer than 100,000 physical qubits. The company delivers these architectures to quantum hardware vendors through research and design partnerships.
Is Iceberg Quantum a public or private company?
Iceberg Quantum is a private company. It is classified as venture growth investor backed and is currently operating.
When was Iceberg Quantum founded?
Iceberg Quantum was founded in 2025. It employs 11 to 50 people.
Where is Iceberg Quantum based?
Iceberg Quantum is headquartered in Sydney, Australia, in the Oceania region.
How does Iceberg Quantum make money?
One revenue line is on record: architecture Licensing and Research Partnerships.
Who are Iceberg Quantum's main competitors?
Emerging players on record are Diraq, QuEra Computing, PsiQuantum and Oxford Ionics. Broad incumbents are Google Quantum AI, Quantinuum and IBM Quantum. Quantum Machines is listed as an others. Direct peers are Riverlane and Alice & Bob.
Does Iceberg Quantum have an API?
No public API is recorded for Iceberg Quantum.
What industry is Iceberg Quantum in?
Iceberg Quantum's product category is Quantum Computing Architecture. Its primary akta.pro industry code is HDAGAJAF, Fault-Tolerant Architectures & Resource Estimation (overhead, layout, scheduling), with a secondary code of HDAGAJAB, Fault-Tolerant Gate Sets & Logical Operations (transversal, lattice surgery, magic-state). Its NAICS code is 5415 and its SIC code is 7371.