Quantum Computing Inc. (QCi)

Overview

Quantum Computing Inc., known as QCi, takes a photonics-first approach. Rather than cooling circuits to a few thousandths of a degree above absolute zero, it uses light and chips made from thin-film lithium niobate, a crystal that controls light very efficiently, and its machines are designed to operate at room temperature. The company describes itself as vertically integrated: it designs the chips, runs a fabrication facility, and sells photonic components as well as complete systems.

Its main quantum product is Dirac-3, a machine for solving optimization problems, which it sells for use cases such as portfolio optimization. It also sells lasers, detectors, photonic integrated circuits, and foundry services, and these photonic products produce most of its current revenue.

History and background

The company began life in 2018 as Quantum Computing Inc. and listed on Nasdaq under the ticker QUBT. For its first years it concentrated on software for quantum optimization, and then shifted to photonic hardware. In 2025 it opened Fab 1, a thin-film lithium niobate chip foundry in Tempe, Arizona, as a pilot-scale facility that it describes as an internal innovation engine rather than a high-volume plant.

Yuping Huang, a photonics professor and one of the company's scientific leaders, became CEO on January 1, 2026. During 2026 QCi has completed three acquisitions to expand its manufacturing and photonics capabilities: Luminar Semiconductor for 110 million dollars in cash, NuCrypt for quantum communications, and NHanced Semiconductors, which became its Fab 2. The company raised substantial capital in 2025 and reported about 1.3 billion dollars in cash, cash equivalents, and investments at the end of June 2026.

How the technology works

Thin-film lithium niobate (TFLN) is a material that can change how light travels through it when an electric voltage is applied, which allows very fast, low-loss optical modulators. Chips made from TFLN can route, switch, and generate photons, and the manufacturing processes are close to those used for semiconductors, so the technology can in principle be mass-produced. QCi's pitch is that this makes quantum hardware smaller, cheaper, and easier to deploy than cryogenic machines.

QCi calls its Dirac-3 approach entropy quantum computing. The machine is designed to solve difficult optimization problems by letting a physical system settle into a low-energy state, which is conceptually similar to quantum annealing. The company says the machine uses quantum effects to escape local minima, and a management response in an earnings call acknowledged that some benchmark data has been published in journals and customer presentations while internal benchmarks have not been released. Readers should therefore treat claims of advantage over classical solvers as unverified until independent evidence is available.

The company also states that it is making progress on gate-based machines that use single photons and heterogeneous integrated chips, but this is at an early stage compared with its optimization hardware. Its near-term business is better described as a photonics component and foundry company with a quantum roadmap than as a maker of general-purpose quantum computers.

Products and platforms

Key milestones

Strengths and challenges

Strengths

• A large cash position of about 1.3 billion dollars, which gives it years of runway.
• A room-temperature approach that avoids cryogenic equipment.
• Its own TFLN foundry capability, which is rare among quantum companies.
• A growing photonics product business that supplies revenue while the quantum roadmap develops.

Challenges and open questions

• Revenue is still small at 5.6 million dollars for the quarter, with a gross loss of about 1.2 million dollars.
• Independent benchmarks that prove an advantage for Dirac-3 over classical optimization methods are limited.
• Multiple acquisitions create integration risk.
• The stock has been highly volatile, and the valuation reflects expectations well ahead of current sales.

Why it matters

QCi illustrates a different route to quantum technology, one built on manufacturing and photonics. If TFLN chips can be mass-produced like semiconductors, then room-temperature quantum devices could become much easier to deploy, for example in telecommunications and sensing.

It is also a reminder to look at where revenue actually comes from. In its case most revenue currently comes from photonics products and foundry services, not from selling general-purpose quantum computers, and an informed reader should judge the company on both its component business and its quantum roadmap.

Latest news

• QCi reports Q2 2026 revenue of 5.6 million dollars, up from 61 thousand a year earlier, and completes the NHanced Semiconductors acquisition — August 2026
• QCi sells, delivers, and installs a Dirac-3 optimization machine at a global consulting firm — June 2026
• QCi completes the 110 million dollar all-cash acquisition of Luminar Semiconductor — 2026
• Yuping Huang becomes CEO of Quantum Computing Inc. — January 2026

Frequently asked questions

This profile is written for educational purposes and summarizes public announcements, company filings, and published research. Last reviewed: September 30, 2026. It is not investment advice. Check the company's official channels for the latest figures and claims.

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