Is this actionable now?

Yes. The official iDEX Open Challenge page is open through 30 September 2026 at 11:59 PM India time; individual DISC/ADITI windows have their own dates.

Applicant must answer a live defence challenge, own or control the solution, meet Indian entity rules and deliver the required prototype milestones.

What burden and restrictions apply?

Milestone payments require technical reviews, cost evidence, trials and defence-user acceptance under the SPARK agreement. Restricted to challenge prototype development and validation; the ceiling is not automatic.

What evidence exists?

iDEX publishes recurring defence challenges and selected winners across the armed services. No comparable current application denominator, award count and acceptance rate are published.

iDEX Defence India Startup Challenges

Challenge-specific milestone grant; standard iDEX challenges may provide up to INR1.5 crore and iDEX Prime challenges may use higher ceilings · Innovations for Defence Excellence / Indian Ministry of Defence · deadline 2026-09-30

iDEX Defence India Startup Challenges is a grant programme from Innovations for Defence Excellence / Indian Ministry of Defence for Indian startups, MSMEs, and eligible individual innovators responding to an open defence or aerospace challenge Current lifecycle: open; the official Open Challenge page lists a 30 September 2026 deadline. Real economics: Challenge-specific milestone grant; standard iDEX challenges may provide up to INR1.5 crore and iDEX Prime challenges may use higher ceilings.

Tier 3governmentindiadefensegrant

Apply Official site Open in the live directory

Key facts

Funder	Innovations for Defence Excellence / Indian Ministry of Defence
Amount	Challenge-specific milestone grant; standard iDEX challenges may provide up to INR1.5 crore and iDEX Prime challenges may use higher ceilings
Deadline	2026-09-30
Decision time	No universal application-to-decision interval is published for the currently verified route.
Eligibility	Applicant must answer a live defence challenge, own or control the solution, meet Indian entity rules and deliver the required prototype milestones.
Restrictions	Milestone payments require technical reviews, cost evidence, trials and defence-user acceptance under the SPARK agreement. Restricted to challenge prototype development and validation; the ceiling is not automatic.
Status	open

Always confirm on the official page before applying — dates and terms change.

Application process

Choose an open DISC or iDEX Prime challenge
Submit solution, team and technical evidence
Complete screening, pitch and defence-user evaluation
Sign the SPARK grant agreement
Deliver prototype milestones and trials
Pursue procurement or follow-on development

Background

Innovations for Defence Excellence / Indian Ministry of Defence operates iDEX Defence India Startup Challenges. This pass separates direct cash, repayable finance, credits, incentives and umbrella programs so later ranking does not compare unlike instruments. iDEX publishes recurring defence challenges and selected winners across the armed services.

How the application really works

Choose an open DISC or iDEX Prime challenge → Submit solution, team and technical evidence → Complete screening, pitch and defence-user evaluation → Sign the SPARK grant agreement → Deliver prototype milestones and trials → Pursue procurement or follow-on development

Tips

Show direct fit with defence.
Show direct fit with aerospace.
Show direct fit with dual-use technology.

Watch out for

Milestone payments require technical reviews, cost evidence, trials and defence-user acceptance under the SPARK agreement.
Restricted to challenge prototype development and validation; the ceiling is not automatic.

Track record

iDEX publishes recurring defence challenges and selected winners across the armed services.

No comparable current application denominator, award count and acceptance rate are published.

Frequently asked questions

Is this actionable now?: Yes. The official iDEX Open Challenge page is open through 30 September 2026 at 11:59 PM India time; individual DISC/ADITI windows have their own dates.
What is the real economic value?: Challenge-specific milestone grant; standard iDEX challenges may provide up to INR1.5 crore and iDEX Prime challenges may use higher ceilings
Who is eligible?: Applicant must answer a live defence challenge, own or control the solution, meet Indian entity rules and deliver the required prototype milestones.
How does selection work?: Choose an open DISC or iDEX Prime challenge; Submit solution, team and technical evidence; Complete screening, pitch and defence-user evaluation; Sign the SPARK grant agreement; Deliver prototype milestones and trials; Pursue procurement or follow-on development. No universal application-to-decision interval is published for the currently verified route.
What burden and restrictions apply?: Milestone payments require technical reviews, cost evidence, trials and defence-user acceptance under the SPARK agreement. Restricted to challenge prototype development and validation; the ceiling is not automatic.
What evidence exists?: iDEX publishes recurring defence challenges and selected winners across the armed services. No comparable current application denominator, award count and acceptance rate are published.

Sources

idex.gov.in/disc-category/18 — Official open-challenge page: open lifecycle, 30 September 2026 deadline, eligible applicant types, application contact and grant ceiling up to INR 1.5 crore (checked 2026-08-10)
idex.gov.in/challenges — Official current challenge catalogue covering DISC, Open Challenge, ADITI and closed/current challenge windows (checked 2026-08-10)
www.idex.gov.in/how_to_apply — Official application and screening procedure, including entity eligibility and expert-committee review (checked 2026-08-10)
www.ddpmod.gov.in/offerings/schemes-and-services/idex — Department of Defence Production's official iDEX scheme overview, funding ceilings and operating model under the Defence Innovation Organisation (checked 2026-08-10)