Oratomic, aiming to build the first fault-tolerant quantum computers, announced today in a press release that it has raised a total of $775 million since its launch in March 2026. The company will use the funds to accelerate the development of utility-scale, fault-tolerant quantum computers.
ARCH Venture Partners, Spark Capital, Khosla Ventures, Index Ventures, General Catalyst, and Bezos Expeditions led the financing.
The company had previously raised $300 million in Series A in July.
Oratomic is building quantum computers based on reconfigurable arrays of neutral atoms and advanced quantum error correction. The company is focused exclusively on building a fault-tolerant quantum computer.
The company’s founders’ March 2026 paper asserted that by leveraging advances in high-rate quantum error-correcting codes, efficient logical instruction sets, and circuit design, Shor’s algorithm can be executed at cryptographically relevant scales with as few as 10,000 reconfigurable atomic qubits. Increasing the number of physical qubits improves time efficiency by enabling greater parallelism; under plausible assumptions, the runtime for discrete logarithms on the P-256 elliptic curve could be just a few days for a system with 26,000 physical qubits, while the runtime for factoring RSA-2048 integers is one to two orders of magnitude longer.
In an extended blog post, the company revealed that it has worked to develop a new approach to fault-tolerant quantum computing based on reconfigurable arrays of atoms trapped in focused laser beams. Physical qubits are encoded in individual atoms, which are moved and entangled with each other by global laser pulses to implement error-corrected quantum computations.
This approach has three key advantages:
(1) Parallel, efficient classical control.
(2) Massive, parallel nonlocal connectivity.
(3) Many qubits at low cost.
Even with these advances, Oratomic’s founding team did not originally think a quantum computer was close to being commercially useful. That changed with a recent finding: because of the nonlocal connectivity of this architecture, an error-corrected computer capable of running Shor’s algorithm may need as few as ten to twenty thousand atomic qubits, and systems trapping comparable numbers of atoms already exist in the lab.
According to the company, “building this computer will be a formidable engineering challenge, but much of the required performance has already been demonstrated, and with significant room for improvement beyond the current state of the art.”
The new funding will support the continued growth of Oratomic’s scientific and engineering team, laboratory infrastructure, and the systems required to build its quantum computers.
Martin Mignot, Partner at Index Ventures, said in a blog post also published today: “We believe Oratomic has all the makings of one of the most consequential companies of its generation. We’re thrilled to partner with Dolev, Manuel, Robert, John, Madelyn, Qian, and the whole “Avengers” team, and to support them as they build the world’s first fault-tolerant quantum computer.”
