Quantum Computing Inc. (QCi) is an American company focused on integrated photonics and non-linear quantum optics to develop machines for quantum computing, machine learning, remote sensing, imaging, and cybersecurity applications. QCi's products, including the Entropy Quantum Computer (EQC), are designed to operate at room temperature and low power, differentiating them from cryogenic quantum systems. The company substantially completed the buildout of its state-of-the-art Thin Film Lithium Niobate (TFLN) chip research and development, prototyping, and small-batch manufacturing facility in Tempe, AZ, in March 2025. QCi acquired Luminar Semiconductor, Inc. (LSI) in February 2026 for $110 million in cash, broadening its photonic chip design and manufacturing capabilities. New products launched include the Dirac-3 EQC in Q1 2024 and Neurawave, a photonics-based reservoir computer, in November 2025. Total revenue increased 83% to $682 thousand in 2025 from $373 thousand in 2024, primarily driven by successful sales of vibrometer and quantum networking devices. The net loss decreased to $18.674 million in 2025 from $68.542 million in 2024. QCi raised $1,475.1 million in net proceeds through private placements of equity during 2025. The company reported an accumulated deficit of $219.2 million as of December 31, 2025. Material weaknesses in internal control over financial reporting were identified as of December 31, 2025, although previously identified weaknesses related to revenue recognition and accounting policies were remediated. QCi is involved in ongoing legal proceedings, including a securities class action lawsuit and multiple shareholder derivative actions.