Can quantum computing save us from 500 missiles attacking simultaneously? Perhaps ... and it has a far better shot than classical computers, say these companies.

Quantum computing represents a potential breakthrough technology that could far surpass the technical limitations of modern-day computing systems for some tasks. However, putting together practical, large-scale quantum computers remains challenging,

While timelines remain uncertain, early investors are positioning for a future where quantum computing plays a meaningful role alongside classical and AI-driven systems. Here are the top quantum computing stocks to consider for 2026—and what to know before investing in this emerging technology.

Diamonds might be the next big thing in quantum computing. Quantum Brilliance now grows ultra-pure diamonds for better quantum sensing and portable quantum computing.

Simmons says that silicon quantum processors offer an inherent advantage in scaling, too. Generating numerous registers on a single chip and using “naturally occurring” qubits, she notes, reduces their need for extraneous confinement gates and electronics as they scale.

This "Magnificent Seven" company is establishing itself in the next frontier of technology.

Amazon is boosting its quantum computing bets with Peter DeSantis, its new leader for AI models, custom silicon (semiconductor chips) and quantum computing. DeSantis is a 27-year Amazon veteran who will oversee the three areas as "naturally reinforcing," according to a company note.

Jefferies strategist Christopher Wood has dropped Bitcoin from his Greed & Fear portfolio, citing quantum computing as a potential existential threat to its cryptography.

Some investors have revived concerns that quantum computing could threaten bitcoin, but analysts and developers say recent price weakness reflects market structure.

The quantum computing underdog faces tough near-term challenges.