Qolab (https://qolab.ai), a Madison-based quantum hardware company, has raised $54.2 million in Series B funding led by UC Investments. The company builds utility-scale superconducting quantum computers by applying advanced semiconductor manufacturing techniques to qubit fabrication. The round includes $12.6M in convertible notes and $10M in future commitments from existing investors.
Semiconductor Processes Target Quantum Scaling Wall
The timing aligns with a broader industry shift toward semiconductor fabs for quantum hardware. Qolab's window-junction process uses subtractive etching on 300mm wafers instead of conventional lift-off methods, addressing yield and reproducibility issues that limit current systems. Strategic investments from Applied Materials and Western Digital underscore this convergence between quantum and semiconductor ecosystems.
Yield and Wiring Bottlenecks Limit Qubit Counts
Current superconducting approaches struggle to produce reliable chips beyond 100 qubits because artisanal fabrication cannot deliver the uniformity required for larger arrays. Qolab targets up to 100,000 qubits per dilution refrigerator through cryogenic integrated circuits and CoWoS-style packaging that integrates control electronics directly into the chip stack.
Qolab Start Delivers Hardware-Level Access
The company's Qolab Start platform provides on-premise or cloud access with pulse-level control for research labs and national labs, differentiating from algorithm-only cloud services. This hardware-level access supports qubit characterization, error mitigation studies, and fabrication process validation.
"It is hard to yield 100-qubit chips today, and you cannot build a million-qubit quantum computer on artisanal fabrication." — John Martinis, Co-Founder and CTO
UC Investments Leads with Semiconductor Backers
UC Investments led the round alongside continued participation from WARF, Octave Ventures, and Phoenix Venture Partners. The involvement of semiconductor-focused investors like Applied Ventures signals validation of Qolab's manufacturing-first thesis over traditional quantum hardware approaches.
Market Growth Driven by Error Correction and Fab Convergence
The quantum computing market is expanding rapidly with forecasts ranging from $8.0B to $20.2B by 2030-2033 at CAGRs between 22.3% and 41.8%. Key drivers include error correction breakthroughs and government programs like DARPA's Quantum Benchmarking Initiative, where Qolab was selected to lead hardware development.
Google Quantum AI Alumni Bring Nobel Credibility
CEO Alan Ho previously led product at Google Quantum AI, while CTO John Martinis, who won the 2025 Nobel Prize in Physics for his work on superconducting qubits, directed the hardware team behind the 2019 quantum supremacy experiment. This founding team brings direct experience from the field's most significant milestones.