If you searched "UIDAI hackathon" hoping to find a form to fill out, there isn't one open right now, and depending on what you read next, you might get two different answers about what the hackathon even asks you to do. That's because UIDAI, the government body behind Aadhaar, has actually run two very different events under roughly that name: a 2021 hackathon about building things, and a 2026 hackathon about analyzing things. Here's how to tell them apart, plus what each one actually involved.
Two hackathons, not one
Both were organized by the Unique Identification Authority of India, and both drew thousands of student teams, but the overlap mostly ends there. The Aadhaar Hackathon 2021 was a build event: teams wrote working software to solve specific Aadhaar problems over a 95-hour window. The UIDAI Data Hackathon 2026 was closer to a research assignment: teams were handed anonymized Aadhaar datasets and asked to write up what they found, with no app or prototype involved at all. If you came here expecting one consistent format, that expectation doesn't hold.
Aadhaar Hackathon 2021: build something, in four days
This one ran from 28 October 2021 at midnight to 31 October 2021 at 11pm, a stretch of roughly 95 hours, and it pulled in more than 3,000 team registrations and over 5,000 individual participants, which made it one of the more competitive student hackathons of that year. UIDAI split it into two themes:
- Enrolment and Update: solving real problems residents hit when trying to update their Aadhaar address, since address changes have historically been one of the more painful parts of the Aadhaar update process.
- Identity and Authentication: building a way to prove your identity without handing over your Aadhaar number or any demographic details at all, which is a genuinely hard privacy problem, not a token UX exercise.
Prizes were ₹3 lakh for first place, ₹2 lakh for second, and ₹1 lakh each for two teams sharing third. Winning teams were also offered the chance to work directly with UIDAI's Aadhaar team on the Aadhaar 2.0 initiative and an invitation to UIDAI's first global conference on Aadhaar 2.0, which is a more substantial follow-on than most student hackathons offer.
UIDAI Data Hackathon 2026: analyze something, no coding sprint required
Five years later, UIDAI came back with a completely different format. The 2026 edition didn't want an app. It wanted teams to dig into anonymized, aggregated Aadhaar enrolment and update data and write up what they found under the theme "Unlocking Societal Trends in Aadhaar Enrolment and Updates," submitted as one consolidated PDF covering their methodology and findings, not a GitHub link or a live demo.
Registration ran January 5 to January 20, 2026, open to any student or researcher at an accredited Indian institution who was at least 18 by January 1, 2026, solo or in teams of up to five. Close to 15,000 teams registered and more than 5,000 projects were actually submitted, screened down to 30 shortlisted projects and then 15 finalists. The top five split a ₹5 lakh prize pool: ₹2,00,000, ₹1,50,000, ₹75,000, ₹50,000, and ₹25,000. Winners, announced at a ceremony on 8 May 2026, included a team spanning the Institute of Engineering and Management, Kolkata and IISER Kolkata, who built out a large feature-engineering and modeling pipeline over millions of enrolment records. If you want the full breakdown of that edition, including exactly what a submission had to contain, the dedicated UIDAI Data Hackathon page covers it in more depth than makes sense to repeat here.
So is anything actually open right now
No. Both editions are closed, and there's no live registration link for a "UIDAI hackathon" as of this writing. What's worth watching is that UIDAI, after the size of the 2026 response, said it's weighing turning the Data Hackathon into an annual fixture and opening future rounds to researchers and startups, not just students. Nothing about a 2027 edition has a confirmed date yet. If you want to be ready whenever that reopens, the better use of your time right now is practicing exactly what separated the finalists from the other 5,000 submissions in 2026: pulling a real, defensible trend out of a messy public dataset and writing it up clearly, since that skill mattered a lot more than any particular tech stack.
Sources for this page: UIDAI's official Aadhaar Hackathon 2021 press releases on pib.gov.in, the UIDAI Data Hackathon 2026 challenge page, UIDAI's own prize announcement on X/Twitter, and this site's own deeper writeup of the 2026 edition. UIDAI hasn't published a public record of hackathons between 2021 and 2026, so this page only covers the two editions that are actually documented rather than guessing at a continuous yearly series.
FAQ
- Is the UIDAI hackathon open for registration right now?
- No. The Aadhaar Hackathon 2021 ran for four days in late October 2021 and is long closed. The UIDAI Data Hackathon 2026 took registrations from January 5 to January 20, 2026, and announced winners on May 8, 2026. Neither is currently accepting entries, and UIDAI hasn't published dates for a next edition.
- What's the difference between the Aadhaar Hackathon 2021 and the UIDAI Data Hackathon 2026?
- The 2021 edition asked for working prototypes: software solutions for Aadhaar address updates and for proving identity without sharing your Aadhaar number or demographic details. The 2026 edition asked for something very different, a written analysis of anonymized Aadhaar enrolment and update datasets, submitted as a single PDF rather than a demo or a repo. If someone tells you to "build an app" for the UIDAI hackathon, they're thinking of 2021, not the most recent one.
- How much could you win?
- In 2021, first prize was ₹3 lakh, second was ₹2 lakh, and two teams split third prize at ₹1 lakh each, with winning teams also offered a chance to work with the Aadhaar team on the Aadhaar 2.0 initiative. In 2026, the prize pool was ₹5 lakh split five ways: ₹2,00,000, ₹1,50,000, ₹75,000, ₹50,000, and ₹25,000 for the top five submissions.
- Will UIDAI run another hackathon?
- Probably, eventually. After the 2026 edition drew nearly 15,000 team registrations, UIDAI said it's considering institutionalizing the hackathon as a recurring, possibly annual, event, and has talked about opening future editions to researchers, startups, and other non-student participants. Nothing is confirmed yet, so there's no 2027 registration link to watch for as of this writing.