The push toward fault-tolerant quantum computing has taken on new urgency, with many viewing the technology as the natural successor to artificial intelligence in terms of transformative potential. That urgency recently translated into concrete government action, as three quantum computing companies each secured $100 million in federal funding under the CHIPS Act, reflecting Washington’s determination to ensure American companies lead this next technological frontier.
Each of these three companies is pursuing quantum computing through a fundamentally different technical approach, and understanding those differences matters for anyone trying to gauge which stands the best chance of winning the broader race.
Rigetti Computing (RGTI): Betting on Speed
Rigetti’s government funding will go toward accelerating its superconducting quantum research and addressing existing technical limitations, with the company outlining three specific initiatives: shrinking the electronics used to control its chips, dramatically expanding its super-cooling freezer capacity, and manufacturing quantum chips with higher density. As part of the arrangement, the U.S. government will also take an equity stake in the company.
Speed has always been Rigetti’s calling card. Its superconducting systems operate roughly 10,000 times faster than trapped-ion approaches and 100 times faster than neutral-atom systems. The tradeoff comes in accuracy, an area where Rigetti still has considerable ground to cover. While competitors like IonQ have achieved 99.99% two-qubit gate fidelity, Rigetti’s Cepheus 1-108Q systems currently sit at just 99.1%—a meaningful gap in a field where precision is everything.
Trading around $15 per share with a market cap of roughly $5.1 billion, Rigetti’s path forward depends heavily on whether it can narrow that accuracy gap while preserving its speed advantage.
D-Wave Quantum (QBTS): Trying to Have It Both Ways
D-Wave secured its own $100 million in government funding, also in exchange for an equity stake, which it plans to use toward developing and scaling both its annealing and gate-model quantum systems. Unlike its two peers on this list, D-Wave has already established itself as the leader in quantum annealing—a more specialized technology suited to solving optimization problems rather than general-purpose computing.
That head start matters. D-Wave’s annealing technology is considerably further along commercially than wide-ranging gate-based systems, with the company already selling its Advantage II systems to customers in logistics, finance, and defense. At the same time, D-Wave has begun expanding into gate-based computing following its acquisition of Quantum Circuits earlier this year, which brought a dual-rail gate-model processor with built-in error detection into the fold. The company’s long-term ambition is to combine the speed advantages of superconducting qubits with the accuracy benefits typically associated with trapped-ion systems—though that effort remains in its early stages.
Trading around $17 per share with a market cap near $6.4 billion, D-Wave’s dual-track strategy gives it commercial traction today while it works toward a more ambitious technical hybrid down the road.
Quantinuum (QNT): Prioritizing Accuracy Above All Else
Quantinuum rounds out the trio, also receiving $100 million in government funding, though notably without having to give up an equity stake in return. The company plans to use the funds to strengthen its supply chain through partnerships with GlobalFoundries and Monarch Quantum. GlobalFoundries will help produce Quantinuum’s next-generation ion traps using 300mm wafer technology, while Monarch will develop the lasers and optical components essential to its trapped-ion systems.
The trapped-ion approach Quantinuum has embraced tends to run slower than superconducting alternatives, but it has consistently proven to be the most accurate quantum technology available. Quantinuum has already achieved 99.92% two-qubit gate fidelity and is targeting 99.999% logical fidelity with its upcoming Sol system next year. The company also brings considerable software strength to the table, including its open-source Guppy programming language, which handles advanced error correction directly within code, and its TKET software development kit, which functions as a universal translator across different quantum systems.
Trading around $49 per share with a market cap of approximately $1.8 billion, Quantinuum benefits from backing by industrial giant Honeywell, adding a layer of financial stability that smaller pure-play competitors may lack.
