IBM vs RGTI: How International Business Machines and Rigetti Computing Compare (2026)
Short answer
IBM (International Business Machines) and RGTI (Rigetti Computing) are often compared because they share investment themes, but they are different businesses. International Business Machines (IBM) is one of the oldest and largest technology companies, now focused on enterprise software, consulting, and infrastructure. Rigetti Computing (RGTI) is a quantum computing company that designs and builds superconducting quantum processors and the full-stack systems and software around them. Neither is universally better: pick by which thesis you are expressing and what you already own. This is descriptive, not a recommendation.
What does International Business Machines (IBM) do?
International Business Machines (IBM) is one of the oldest and largest technology companies, now focused on enterprise software, consulting, and infrastructure. Its strategy centers on hybrid cloud and AI, anchored by Red Hat (the open-source software it acquired) and its watsonx AI platform. IBM's Software segment sells automation, data, security, and hybrid-cloud software, increasingly on a recurring subscription basis. Consulting provides large-scale technology and business services, helping enterprises modernize and adopt AI. Infrastructure includes IBM's mainframe systems (the zSystems that run mission-critical workloads for banks and large enterprises) and related storage. IBM makes money from a mix of recurring software, services contracts, and hardware tied to mainframe cycles. After years of slow growth, IBM has repositioned around hybrid cloud and AI, divested legacy businesses (spinning off Kyndryl), and emphasized recurring revenue and free cash flow. Founded in 1911 and headquartered in Armonk, New York, IBM is a mature, dividend-paying enterprise technology company.
What does Rigetti Computing (RGTI) do?
Rigetti Computing (RGTI) is a quantum computing company that designs and builds superconducting quantum processors and the full-stack systems and software around them. It operates an integrated approach: it fabricates its own quantum chips in an in-house foundry, builds multi-qubit quantum processing units, and offers access to its machines through Quantum Cloud Services and partner cloud platforms. Rigetti's strategy centers on improving qubit count, gate fidelity, and system reliability over successive processor generations, working toward machines that can eventually deliver advantages over classical computers for specific problems. Customers and partners include government, research, and enterprise organizations exploring quantum algorithms. The company is still in an early, pre-commercial-scale phase: revenue is small and inconsistent, and it operates at a loss while investing in hardware research and fabrication. Founded in 2013 and headquartered in Berkeley, California, Rigetti went public via a SPAC merger in 2022 and remains a long-horizon, speculative bet on whether superconducting quantum computing reaches practical, fault-tolerant utility.
IBM vs RGTI: how do they differ?
Both fit overlapping themes, but they are not interchangeable. International Business Machines is best understood through its own drivers, and Rigetti Computing through its. The useful comparison is which set of drivers and risks you want exposure to.
- IBM drivers: Hybrid cloud with Red Hat; Enterprise AI with watsonx.
- RGTI drivers: Full-stack and in-house fabrication; Cloud access and partnerships.
IBM or RGTI: which should you pick?
The bottom line: IBM vs RGTI
IBM and RGTI are related but distinct: same themes, different businesses and risks. Neither wins in the abstract; the right pick is whichever thesis you actually believe, sized so you are not over-concentrated in one theme. Walnut can show your combined IBM and RGTI exposure against your real portfolio. It is not an investment adviser.
Build a basket around IBM with Walnut
Use International Business Machines as one constituent in a thematic basket Walnut's AI helps you assemble. Describe a thesis you believe in, the AI proposes the holdings and weights, and you approve before any broker order.
FAQ
What is the difference between IBM and RGTI?
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International Business Machines (IBM) is one of the oldest and largest technology companies, now focused on enterprise software, consulting, and infrastructure. Rigetti Computing (RGTI) is a quantum computing company that designs and builds superconducting quantum processors and the full-stack systems and software around them. They show up together because they share investment themes, but they are different businesses, so the better fit depends on which thesis you are expressing.
Is IBM or RGTI the better stock?
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Walnut is informational, not investment advice. Neither is universally better; IBM and RGTI suit different views and risk levels. Compare what each does, how they make money, and the risks, then decide which fits your thesis and what you already own.
Should you own both IBM and RGTI?
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Because they share themes, owning both concentrates you in that theme. That can be intentional (a focused bet) or accidental (less diversification than it looks). Walnut can show your combined exposure across both before you add the second.
What are the risks of IBM vs RGTI?
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IBM: IBM is a mature company that has struggled to grow revenue much above low single digits, so the story depends on the higher-growth software and AI mix offsetting slower legacy areas. Consulting is cyclical and sensitive to enterprise IT budgets. IBM competes against larger, faster-growing cloud and software rivals like Microsoft, Amazon, and Google, and its public-cloud presence is small. The Red Hat acquisition added debt, and large past acquisitions carry integration and goodwill risk. Mainframe revenue is lumpy, tied to product cycles. Realizing the AI opportunity at scale is uncertain, and the stock's appeal rests heavily on cash flow and the dividend rather than rapid growth. RGTI: Rigetti is early-stage with small, inconsistent revenue and persistent operating losses, so it depends on its cash and periodic capital raises that can dilute shareholders heavily. Practical, fault-tolerant quantum computing remains unproven and may be many years away, if it arrives at all on the expected timeline. Competition is intense and well-funded, including large technology companies (IBM, Google, and others) and rival modalities such as trapped-ion and photonic approaches that could win out over superconducting qubits. The stock is highly volatile and trades heavily on quantum-sector sentiment and milestone news. An investment could lose substantial value if the technology or business does not progress as hoped.
Walnut is informational, not investment advice. This page is descriptive and not a recommendation to buy or sell IBM or RGTI; figures are approximate and dated. Verify current data before investing.