iDEX (Innovations for Defence Excellence): India’s Defence Startup Engine Explained

iDEX, or Innovations for Defence Excellence, is the Government of India’s flagship scheme for fostering innovation and technology development in the defence and aerospace sectors. iDEX was launched on 12 April 2018 by Prime Minister Narendra Modi at the DefExpo in Chennai. iDEX is implemented by the Defence Innovation Organisation (DIO), a section 8 not-for-profit company set up by the Department of Defence Production with HAL and BEL as the founding members. The scheme works through structured challenges that invite startups, MSMEs, individual innovators, R&D institutes, and academia to solve specific defence problem statements and receive grant-in-aid funding to develop prototypes.

For UPSC GS-III aspirants studying internal security, science and technology, and the Indian economy, iDEX is a high-yield current affairs topic. It cuts across defence indigenisation, the Make in India initiative, startup ecosystem development, the Atmanirbhar Bharat vision in defence, and the structural shift in how India procures critical defence technologies.

This article walks through the iDEX architecture, the key challenge frameworks (DISC, SPRINT, ADITI), the funding mechanisms, the results so far, the budgetary commitments, and where iDEX fits in India’s broader defence reform agenda.

What iDEX Actually Does

iDEX is structured as a problem-led innovation programme. The three services (Army, Navy, Air Force), the Defence PSUs, and the DRDO identify specific operational or technical problems for which existing market or in-house solutions are inadequate. These problems are converted into challenge statements and published through iDEX. Startups, MSMEs, and innovators apply with proposed solutions. Selected applicants receive grant-in-aid funding to develop prototypes, and successful prototypes can be procured by the services under the Make-II and other procurement categories of the Defence Acquisition Procedure (DAP) 2020.

Funding Framework

The iDEX funding architecture has evolved since 2018. The headline numbers are:

• iDEX Standard: Grant-in-aid of up to Rs 1.5 crore per challenge winner for prototype development.
• iDEX Prime: Grant-in-aid of up to Rs 10 crore per project for more mature defence technologies requiring higher capital outlay. Launched in 2022.
• ADITI (Acing Development of Innovative Technologies with iDEX): Up to Rs 25 crore grant per project for deep-tech projects that take 18-24 months and require significant R&D investment. Launched in 2024.

The funding is structured as milestone-based grant-in-aid, not equity or loan. Startups retain full ownership of their intellectual property, which is one of the key design features that has made iDEX attractive to the startup ecosystem.

Eligibility

iDEX is open to startups recognised by DPIIT, MSMEs, individual innovators, R&D institutes, and academia, with majority Indian ownership. The scheme has progressively expanded eligibility to ensure broad participation. iDEX does not fund large industry on its own, but allows large industry to participate as a development partner with a startup.

The Three Service Challenges: DISC, SPRINT, and ADITI

iDEX runs its operations through structured rounds of challenges, of which three frameworks are the most important.

Defence India Startup Challenges (DISC)

DISC is the core iDEX programme and has run multiple editions since 2018. Each DISC edition consists of a set of problem statements identified by the three services and the Defence PSUs. As of 2026, DISC has crossed 13 editions and has resulted in hundreds of challenges across surveillance, autonomous systems, sensors, navigation, secure communications, materials, propulsion, and other domains.

SPRINT Challenges (Indian Navy)

SPRINT (Supporting Pole-vaulting in R&D through iDEX, NIIO and TDAC) is an Indian Navy-led challenge framework launched in 2022. It targets 75 challenges in the 75th year of Independence and includes the Maritime Surveillance Domain Awareness, autonomous underwater vehicles, mine countermeasures, and naval combat systems. SPRINT was a deliberate scaling-up exercise to demonstrate that iDEX could deliver at higher technical readiness levels.

ADITI (Acing Development of Innovative Technologies with iDEX)

ADITI was launched in 2024 as the deep-tech tier of iDEX. ADITI specifically targets 30 critical and strategic defence technologies including hypersonic propulsion, directed energy weapons, autonomous swarms, advanced cyber capabilities, artificial intelligence in defence applications, secure communications, and quantum technologies. Each ADITI project can receive up to Rs 25 crore in grant-in-aid, which is a significant escalation from the standard iDEX ceiling of Rs 1.5 crore.

The ADITI window is specifically designed for projects that may not yield immediate procurement orders but address India’s longer-term technological gaps in critical and emerging defence technologies.

The Defence Innovation Organisation (DIO)

The Defence Innovation Organisation is the apex implementing body for iDEX. The DIO is a Section 8 not-for-profit company set up in 2018 by the Department of Defence Production with Hindustan Aeronautics Limited (HAL) and Bharat Electronics Limited (BEL) as the founding member companies. The DIO has subsequently brought in other Defence PSUs and the Ordnance Factory Boards’ successor entities as members.

DIO Governance

The DIO is governed by a board chaired by the Defence Secretary, with representation from the three services, the DRDO, and the Defence PSUs. The High-Powered Selection Committee (HPSC) selects the challenge winners. The DIO’s operational arm is the iDEX team, headquartered in New Delhi.

Partner Incubators

iDEX operates through a network of Partner Incubators (PIs) located across the country. These are existing incubators in IITs, IIITs, IISc, and other institutions that have been formally inducted into the iDEX ecosystem. The Partner Incubators provide mentoring, lab access, and operational support to challenge winners. As of 2026, the Partner Incubator network has expanded to cover most major innovation clusters in India.

Results So Far

iDEX has delivered results that are both quantitative and qualitative. The headline numbers, as of early 2026, are along the following lines:

• Over 500 problem statements opened across DISC, SPRINT, and ADITI editions
• Over 400 contracts signed with startups, MSMEs, and innovators
• Several hundred prototypes developed
• Procurement orders worth thousands of crores have been placed by the three services and Defence PSUs for iDEX-developed products
• Defence Acquisition Council clearance for iDEX procurements under the Make-II and Buy (Indian-IDDM) categories has accelerated significantly since 2022

Some of the well-known iDEX outcomes include indigenous unmanned aerial systems, anti-drone solutions, ruggedised tactical communication equipment, and autonomous underwater vehicles. Several iDEX startups have grown into mid-sized defence technology firms exporting to friendly foreign countries.

Budgetary Commitments

The Union Budget has progressively scaled up iDEX allocations. In the FY25 Union Budget, the allocation for iDEX and the broader defence innovation ecosystem was enhanced significantly, with multi-year commitments that signal sustained government backing. The FY26 Budget continued the upward trajectory, with separate line items for iDEX, iDEX Prime, and ADITI ensuring that each tier has dedicated funding visibility.

The cumulative budgetary commitment to iDEX and its variants over a multi-year horizon is in the range of thousands of crores, which is a meaningful share of the Department of Defence Production’s allocations to defence innovation.

How iDEX Fits the Broader Defence Reform Agenda

iDEX is one piece of a larger reform pipeline that includes the Chief of Defence Staff office driving capability development, the theaterisation of the Indian military that will shape capability requirements at the theatre level, and the Agnipath Scheme that is reshaping the personnel pyramid.

iDEX-developed technologies feed into capability programmes. Indigenous components and subsystems for platforms like the Agni missile series and the BrahMos missile, naval systems for platforms like INS Vikrant, and aerospace technologies that complement programmes like the Kaveri engine by DRDO are increasingly being sourced through the iDEX startup ecosystem. India’s overall defence trade and acquisition picture, captured by the SIPRI 2025 data on India’s defence trade, shows the gradual transition toward indigenous capability that iDEX is meant to accelerate.

Critiques and Challenges

iDEX has been praised for its design and pace, but it also faces critiques.

The first critique is the gap between prototype development and procurement at scale. Many iDEX winners have struggled to convert successful prototypes into firm procurement orders because of the long Defence Acquisition Procedure cycle, capability vintage clauses, and the working capital constraints of small firms. The Defence Acquisition Council and the Department of Military Affairs have been working to shorten these timelines, but the bottleneck remains.

The second critique is the technology readiness ceiling. iDEX has been very effective at TRL 4-6 prototyping but less so at TRL 7-9 productionisation. The ADITI tier has been introduced partly to address this, but the test for the deep-tech window is yet to play out fully.

The third critique is geographical concentration. A disproportionate share of iDEX winners come from Bengaluru, Pune, Hyderabad, and the NCR. The Partner Incubator expansion is intended to broaden the geographical base, but tier-2 and tier-3 city participation remains lower than the policy intent.

The fourth critique is export readiness. iDEX has been designed primarily for domestic procurement, with limited explicit linkages to defence exports. As India’s defence export aspirations grow, the export pipeline from iDEX-developed products will need to be more deliberately built.

Frequently Asked Questions

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