Quantum Computing Inc.
IPOQuantum Computing Inc. is a hardware company in Leesburg, United States, founded in 2018. It has raised $704.0M across 3 rounds, most recently a $500.0M Private Equity in 2025 (est.).
Quantum Computing Inc
- Headquarters
- Leesburg, Virginia
- Employees
- 51–200
- Founded
- 2018
- Business Model
- B2B
- Website
- quantumcomputinginc.com
- Total Funding
- $704.0M
- Last Round
- $500.0M Private EquityJan 2025
- Rounds
- 3
- Type
- Public
Totals include recorded grants and other qualifying funding, not just equity. What counts toward funding.
Indexed holds 3 funding rounds for this company. The full record is or through the API.
About
Quantum Computing Inc. (QCi) (Nasdaq: QUBT) is an innovative, integrated photonics and quantum optics technology company that provides accessible and affordable quantum machines to the world. Founded in 2018 and headquartered in Leesburg, Virginia, QCi builds practical, scalable, room-temperature quantum photonics products that harness the quantum nature of light to capture data, compute complex problems, and communicate with unprecedented security. The company serves government and enterprise customers — including DARPA, the U.S. Navy, Air Force, Army, NASA, and the National Institute of Standards and Technology (NIST) — with solutions spanning quantum computing, quantum networking, quantum sensing, and quantum-powered AI. QCi operates a photonics foundry (the QCi Foundry) targeting a 150mm wafer line and has raised substantial capital in 2025 to support commercialization of its vertically integrated quantum photonic platform.
Summary
It lists 51–200 employees. It has raised $704.0M in total across 3 rounds, most recently a $500.0M Private Equity round in 2025 (est.).
Tech & App Stack
3 technologies & apps tracked
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Funding & Exit History
Nov 2025
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Funding: Pre-Seed through Private Equity. Amounts, valuations, and investors where available.
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