QNu Labs has raised more than ₹350 crore to expand its quantum cybersecurity business, with part of the funding planned for a 2,000-km quantum key distribution network connecting Bengaluru and Delhi to protect critical financial systems.
QNu Labs raises over ₹350 crore in fresh funding
Indian quantum cybersecurity startup QNu Labs has raised more than ₹350 crore as it prepares to scale its quantum-safe security technology and expand its infrastructure.
The Bengaluru-based deep-tech company has raised ₹200 crore in a Series A1 venture funding round led by the National Quantum Mission and venture capital firm Speciale Invest. It has also received approval for ₹150 crore in convertible debt under the Research, Development and Innovation Fund.
The latest funding takes QNu Labs’ total venture funding to ₹375 crore, according to a report by The Times of India.
Economic Times separately reported that the ₹200-crore round included participation from Sony Innovation Fund, Gaja Capital and Artha Ventures, alongside the lead investors. The company plans to use the capital to accelerate research and development, expand sales and go-to-market operations in India and overseas, and broaden its technology stack.
The funding comes as governments, banks and other critical infrastructure operators prepare for a future in which conventional encryption could face new risks from powerful quantum computers.
2,000-km quantum network planned between Bengaluru and Delhi
One of the most significant plans linked to the new capital is the development of a 2,000-km live quantum key distribution network connecting Bengaluru and Delhi.
According to The Times of India, QNu Labs plans to use part of the fresh capital to build the network under the National Quantum Mission. The proposed network is intended to secure critical financial systems along the route.
Quantum Key Distribution, commonly known as QKD, uses principles of quantum physics to establish cryptographic keys between communicating parties. The technology is designed so that attempts to interfere with the quantum communication channel can be detected.
The planned Bengaluru to Delhi network is therefore not simply a conventional fibre network with stronger passwords. It represents a different approach to protecting encryption keys, particularly for communications where the confidentiality of information is critical.
The project also fits into India’s wider National Quantum Mission, which has set a target of developing a 2,000-km quantum communication network over an eight-year period.
India has already demonstrated a 1,000-km quantum network
The proposed 2,000-km network builds on an important milestone already achieved in India.
In April 2026, the Department of Science and Technology said a 1,000-km quantum communication network had been successfully demonstrated under the National Quantum Mission. The technology was developed using indigenous technology from QNu Labs.
The government said the 1,000-km network was demonstrated in less than two years after the National Quantum Mission was launched. The milestone was described as significant progress toward the mission’s longer-term 2,000-km target.
The network is important because it demonstrates that quantum-secure communication can be extended well beyond a laboratory environment. According to the Department of Science and Technology, the technology can support secure communications across areas such as defence, financial systems and critical infrastructure.
QNu Labs’ own history also shows a progression from shorter QKD deployments to larger networks. The company says it demonstrated a 100-km QKD network in 2020, developed a 150-km trusted-node system in 2021 and later deployed larger intercity networks.
What is quantum key distribution and why does it matter?
Quantum Key Distribution is a method of distributing encryption keys using quantum communication rather than relying entirely on conventional mathematical assumptions.
In a traditional encrypted connection, security depends heavily on cryptographic algorithms and the difficulty of solving certain mathematical problems. Quantum computing raises concerns because sufficiently powerful quantum computers could eventually threaten some widely used public-key cryptographic systems.
QKD addresses a different part of the problem by using quantum properties to distribute keys. If someone attempts to intercept the quantum information in a way that disturbs the system, the communicating parties can identify that the channel has been compromised.
This does not mean that QKD makes every part of a network automatically secure. Endpoints, software, authentication systems, hardware and network infrastructure still need protection. That distinction is important when describing quantum cybersecurity because QKD is one component of a broader security architecture.
QNu Labs develops both QKD and other quantum-safe technologies. Its product portfolio includes Armos for QKD, Tropos for quantum random number generation and QShield, a broader quantum-safe security platform.
Why banks and critical infrastructure are a major focus
The push toward quantum-safe cybersecurity is particularly relevant for sectors that handle sensitive information over long periods.
Banks and financial institutions process transactions and store information that needs protection against cyberattacks. Government departments, defence organisations, telecom operators and healthcare institutions face similar concerns because sensitive information can have long-term value.
One emerging cybersecurity concern is sometimes described as harvest now, decrypt later. In this scenario, an attacker could collect encrypted information today and attempt to decrypt it in the future when more powerful computing technology becomes available.
That makes the transition to quantum-safe security a long-term infrastructure issue rather than something that begins only after a large quantum computer is built.
QNu Labs has already worked with Indian defence organisations. The Department of Science and Technology says the company has developed QKD systems and quantum-safe technologies for defence applications, while its own company history records deployments involving the Indian Army and Navy.
QNu Labs’ role in India’s quantum technology push
QNu Labs was incubated at IIT Madras Research Park in 2016 and has focused on quantum cryptography and quantum-safe cybersecurity. The company launched its QKD technology in 2018 and subsequently expanded into quantum random number generation, post-quantum cryptography and other security products.
The startup is also one of the companies supported under India’s National Quantum Mission.
The Department of Science and Technology has previously highlighted QNu Labs’ work on large-scale QKD networks. In 2025, the department reported a demonstration of a QKD network spanning more than 500 km over existing optical fibre infrastructure.
The company has therefore been building toward larger deployments rather than starting its quantum communication work with the latest funding round.
The new capital could help move that work from demonstrations and individual deployments toward wider commercial and strategic infrastructure.
What the ₹350-crore funding means for India’s deep-tech sector
The QNu Labs funding is notable beyond the quantum technology sector because deep-tech startups generally require significantly more capital and longer development timelines than conventional software businesses.
Quantum technology involves specialised hardware, scientific research, testing, certification and infrastructure deployment. Commercialising such technology can therefore require sustained investment before large-scale revenues become possible.
The participation of the National Quantum Mission and the RDI Fund also highlights the role of government-backed capital in developing strategic technologies in India. The National Quantum Mission has been supporting startups and research organisations working across quantum computing, communications, sensing and related fields.
For India, building domestic capability in quantum cybersecurity also has a strategic dimension. A larger indigenous ecosystem could reduce dependence on overseas suppliers for technologies that are expected to become important to secure government, defence and commercial communications.
What happens next for the 2,000-km network?
The immediate focus for QNu Labs will be turning its existing technology into a larger operational network.
The company has already demonstrated a 1,000-km quantum communication network under the National Quantum Mission. The next step is to extend the reach and build infrastructure capable of supporting real-world requirements across a much larger geographic distance.
The proposed Bengaluru to Delhi connection would span a major north-south corridor and could provide a practical test case for protecting high-value communications between distant locations.
However, the 2,000-km plan should be understood as an infrastructure project under development, not as a completed network. The existing 1,000-km milestone and the proposed 2,000-km deployment are separate stages.
The larger network will also need to address practical issues such as network reliability, trusted nodes, fibre availability, integration with existing communications infrastructure and operational security.
Key takeaways
- QNu Labs has raised more than ₹350 crore through a ₹200-crore venture funding round and ₹150 crore in approved convertible debt.
- The company plans to use part of the capital to build a 2,000-km quantum key distribution network connecting Bengaluru and Delhi.
- India has already demonstrated a 1,000-km quantum communication network using indigenous technology developed by QNu Labs.
- The funding comes as India expands its National Quantum Mission and prepares critical sectors for the long-term security challenges posed by quantum computing.
FAQs
How much funding has QNu Labs raised?
QNu Labs has raised more than ₹350 crore in the latest funding and debt arrangements. The company has raised ₹200 crore in a Series A1 venture round, while ₹150 crore in convertible debt has been approved under the Research, Development and Innovation Fund. The latest round takes its total venture funding to ₹375 crore.
What is QNu Labs’ 2,000-km network?
It is a planned live quantum key distribution network that is expected to connect Bengaluru and Delhi. The network is being developed under the National Quantum Mission and is intended to provide secure communications for critical financial systems along the route.
What is Quantum Key Distribution?
Quantum Key Distribution, or QKD, is a method of distributing cryptographic keys using quantum communication. Its security model allows attempts to interfere with the quantum channel to be detected, making it a potential component of future quantum-safe communication infrastructure.
Has India already built a 1,000-km quantum network?
Yes. The Department of Science and Technology said in April 2026 that a 1,000-km quantum communication network had been successfully demonstrated under the National Quantum Mission using indigenous technology developed by QNu Labs. The achievement was presented as progress toward the mission’s longer-term 2,000-km target.
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