QUBT vs. RGTI: Which Quantum Stock Is the Better Pick Now? Quantum ComputingQUBT or QCi and Rigetti RGTI are widely followed pure-play quantum computing companies focused on developing quantum hardware and driving commercial adoption. QCi is focused on integrated photonics, quantum optics and advanced semiconductor manufacturing. Its products are designed to operate at room temperature with relatively low power requirements, targeting applications in optimization, AI, sensing, imaging and cybersecurity. Key offerings include the Dirac Entropy Quantum Computer, NeuraWave photonic reservoir computing platform, photonic sensing systems and quantum-secured communication solutions, alongside photonic-chip foundry and advanced packaging services. Rigetti develops and operates superconducting quantum computers, using a vertically integrated approach that spans chip design, fabrication, systems and cloud delivery. Its products include the Novera QPU, the 84-qubit Ankaa-3 system and the newer 36-qubit Cepheus-1-36Q, which uses its proprietary multi-chip architecture. The company also provides cloud access through Rigetti Quantum Cloud Services (“QCS”) and offers foundry and professional services. Per a Fortune Business Insights report, the global quantum computing market size was valued at $1.39 billion in 2025. The market is projected to grow from $1.82 billion in 2026 to $17.89 billion by 2034, exhibiting a CAGR of 33.0% during the period. Over the past month, shares of QUBT and RGTI have gained 8.1% and 9.7%, respectively. Image Source: Zacks Investment Research Recent Developments Supporting QCi’s Growth QCi expanded customer traction across its quantum optimization and photonic computing platforms, including the sale and installation of a Dirac-3 system for enterprise applications, such as portfolio optimization. NeuraWave reached deployment readiness, supported by a framework agreement with Planck Dynamics representing more than $10 million in potential value. The company also acquired NHanced Semiconductors to accelerate Fab 2 and expand advanced packaging and photonic integration capabilities. QUBT Stock’s Drawbacks In the second quarter, operating expenses totaled