/ 01
AI
Agents, copilots, multimodal products, and applied machine learning that solve a real problem.
HackBlox — a 24-hour AI & Web3 open-source hackathon
AIWeb3Open Source Contribution24-hour build
Pick your track — AI or Web3 — and contribute to open source along the way. HackBlox brings developers, designers, and makers together for one high-energy day of shipping real demos and real contributions.
- Round 2
- 5 Sep / 24h
- Format
- Online
- Submit
- On GitHub
git commit -m "ship it"
AI · model.fit()
WEB3 · deploy()
pull request · merged
Round 2 starts in
Live timer--
Days
--
Hours
--
Minutes
--
Seconds
0
Hours of building
₹0
Total prize pool
0
Innovation tracks
GitHub
Public submissions
Online
Global experience
Build where AI and Web3 meet.
HackBlox is a 24-hour sprint for teams turning ambitious ideas into working demos. Pick your track — AI or Web3 — and ship something real. Every project is open source by default.
/ 02
Web3
On-chain apps, smart contracts, identity, ownership, and new ways for people to coordinate.
Mandatory
Open Source
Every participant contributes to an open source repository as part of the hackathon. Come ready to ship real code.
Why HackBlox
Build across the stack, not inside a box.
AI, Web3, and open source belong in the same builder room. HackBlox gives you the time, people, and pressure to connect them into something real.
AI That Ships
Go beyond a model demo. Turn agents, multimodal systems, and applied ML into products people can actually use.
On-chain by Design
Use smart contracts, verifiable ownership, and decentralized rails where they make the product stronger.
Build in Public
Ship a clear public repository, get real feedback, and leave behind work that can keep growing after the event.
Industry Mentors
Get practical feedback from people building across AI, Web3, product engineering, and open-source ecosystems.
Builder Network
Meet founders, maintainers, community leads, and other makers in a room designed for collaboration.
Proof of Work
Leave with a working demo, a public build story, and a repository you will be proud to share.
Tracks
Pick your track. Build the future.
Choose one track — AI or Web3 — and build something extraordinary. Every participant must contribute to open source.
Challenge Live01
AI Track
3LC — Data-Centric AI Challenge
Build Intelligence
Build a 6-class natural-scene classifier with a fixed ResNet-18 trained from scratch. Inspect embeddings in 3LC, actively label up to 3,000 samples, and compete on Kaggle.
OR
3 PS Live02
Web3 Track
24-Hour Build Sprint
Build Ownership
Build decentralized applications with smart contracts, verifiable identity, and milestone-based governance on Sepolia testnet.
3 Problem Statements Released24H Sprint
Mandatory
Open Source Contribution
Every participant must contribute to an open source repository as part of the hackathon. Come ready to ship real contributions to a real project.
ContributeRepo TBAShip code
[ Event timeline ]
Two rounds,
block by block.
All times IST. Round 1 contributions deadline 4 Sep, Round 2 build sprint starts 5 Sep. Fully online — everything happens on GitHub and the RDM app, wherever you're hacking from.
Registration
Team applications open on the portal. Squads of two to four, fully remote, no location requirement.
AsyncRound 1 — Phase 1
Open source contributions round. Participants made meaningful contributions to open source repositories.
GitHubRound 1 — Phase 2
Open source contributions continue. Submit your contributions before the deadline — final push to your repos.
GitHubRound 2 — Build Sprint
The 24-hour AI & Web3 build sprint begins. Pick your track, fork the repo, and start hacking.
LiveCode Freeze
Final push to GitHub. Repositories are tagged and locked — no commits after the mark.
GitHubSubmissions & Judging
Submissions will be made on the RDM app. Judges review async over the next few hours.
RDM AppWinner Announcement
Results announced on the RDM app. Prizes, merge invitations for standout PRs, and closing notes.
RDM AppCommunity & Vibes
Chatting, memes, brainstorming, and fun on Discord the entire time. Jump in, hang out, and vibe with fellow hackers.
Discord
Prize Pool
₹50,000
In prizes — awarded for work that ships.
Build something bold. Ship something real. Walk away rewarded.
Powered by teams that ship.
Partners backing 24 hours of AI, Web3, and open-source building.
Judges & Mentors
Meet our judges and mentors.
Industry engineers, founders, and ecosystem leaders guiding your builds and evaluating project submissions.
AI TrackAI Mentor & Judge
Rishikesh Jadhav
AI/ML Engineer @ 3LC AI
AI/ML Engineer at 3LC AI specializing in computer vision, 3D vision, and training data optimization. Former simulation engineer at Duality AI with an M.S. in Robotics from University of Maryland. Experienced competition judge and architect of the 3LC × HackBlox Scene Classification Challenge.
Web3 TrackWeb3 Judge
Web3 TrackWeb3 Mentor
Surya Gupta
Lead @ India Blockchain Month & BlockOn
Ecosystem Growth & DevRel specialist across Web3, AI, and smart contracts. Research & Partnerships Lead at India Blockchain Month, Market Research Analyst at BlockOn Ventures, and NASA Space Apps Challenge 2024 Finalist with 5+ hackathons mentored.
HackBlox 2026 ChampionsFinal Results
Final Results
Podium
Celebrating the visionary engineers, builders and open-source contributors who conquered the 24-hour sprint.
Track 01 · 3LC — Data-Centric AI Challenge
AI Track
Winner · 1st Place
₹5,000
Champion
Winning Team
Algorithmictalker
Team Members (3)
Pragyanparamita Moharana
Ankit Sahoo
Amit Das
Runner-Up · 2nd Place
₹3,000Runner-Up
Runner-Up Team
Hope
Member
Shaik Arshad Ali
Track 02 · 24-Hour Build Sprint on Sepolia
Web3 Track
Winner · 1st Place
₹5,000
Champion
Winning Team
Dijkstra
Team Members (3)
Rujitha G
Shebha M
Sidharth R K
Runner-Up · 2nd Place
₹3,000Runner-Up
Runner-Up Team
Brain catalyst
Member
Kommavarapu Kameswari Sreevalli
Perks & Rewards
Additional Finalist & Participant Benefits
Special perks provided to all finalist teams, podium winners, and hackathon participants.
Finalist Exclusive
All Finalist Teams
n8n Cloud Pro
1 Month Free Access
Complimentary 1-month n8n Cloud Pro subscription access for all finalist teams to automate workflows and supercharge production systems.
HackBlox 2026 Included
Top 4 Teams
Winners & Runner-Ups
Free .xyz Domains
1-Year Free Domain
Free 1-year .xyz domain registration for all winning and runner-up teams to host, ship, and showcase their hackathon projects live.
HackBlox 2026 Included
For Everyone
All Participants
Participation Certificates
Official & Verifiable
Official verifiable HackBlox 2026 digital certificates of participation for all eligible builders across both phases.
HackBlox 2026 Included
See all shortlisted participants
Explore the complete Phase 1 & Phase 2 qualifying teams, members, and submissions.
5 September 2026 · 24-Hour Build Sprint · ₹50,000
Ready to build
the future?
Round 1 Phase 2 contributions deadline is 4 September. Round 2 — the 24-hour AI & Web3 build sprint — kicks off 5 September 10:00 AM IST. Bring your strongest idea with a team of two to four.
Register now
Free entry · No travel required · Ship from anywhere