Blockchain & Web3 Hackathons
Explore 91 blockchain & Web3 hackathons. Hackathons exploring blockchain technology, smart contracts, DeFi, DAOs, and decentralized applications.
Hackathons
82
Avg Prize
$132K
Organizers
64
Tuesday, October 6, 2026
Ongoing
SUSTAIN-A-THON 2.0
In Person
Sep 18 – Oct 7, 2026Sharda University Greater NoidaRuhallapur, India$1K
Blockchain
Cybersecurity
IoT
Ongoing
TOKEN2049 Origins Hackathon
Online
Oct 6 – Oct 8, 2026TOKEN2049Online
Blockchain
Cloud
Data Science
Ongoing
Origins Hackathon Top 5 Demos
In Person
Oct 6 – Oct 8, 2026Otis RisingSingapore, Singapore
Blockchain
Artificial Intelligence
Fintech
Ongoing
WEEX AI Wars II: Rise of Intelligence
Online
Jul 7 – Oct 12, 2026WEEX LABsOnline$200K
Artificial Intelligence
Web Development
Blockchain
Ongoing
WEEX AI Wars II：人类 vs AI
Online
Jul 7 – Oct 12, 2026WEEX LABsOnline$200K
Artificial Intelligence
Web Development
Blockchain
Ongoing
WEEX AI Wars II：人類 vs AI
Online
Jul 7 – Oct 12, 2026WEEX LABsOnline$200K
Artificial Intelligence
Web Development
Blockchain
Ongoing
Build Station Dublin | Colosseum Hackathon
In Person
Sep 28 – Oct 12, 2026Superteam IrelandDublin 1, Ireland
Blockchain
Ongoing
Crypto World's Fair Hackathon
Online
Sep 7 – Oct 12, 2026ColosseumOnline$2.5M
Blockchain
Ongoing
CodeAstra 2.0 – 24-Hour Offline Hackathon
In Person
Oct 1 – Oct 13, 2026Association of Budding Information Technocrats (ABIT), RGITMumbai, India$1K
Cloud
Artificial Intelligence
Blockchain
Ongoing
Build Station - Colosseum Crypto World's Fair
In Person
Oct 5 – Oct 13, 2026Toronto, Ontario, Canada
Hackathon
Blockchain
Ongoing
Arc Microgrants | Circle
Online
Sep 16 – Oct 15, 2026CircleOnline$10K
Blockchain
Cloud
Ongoing
Building With IBM Bob Hackathon
Online
Sep 28 – Oct 18, 2026IBMOnline
Social Impact
Blockchain
Web Development
Ongoing
Bittensor Global Subnet Hackathon
Online
Aug 21 – Oct 19, 2026BittensorOnline$10K
Artificial Intelligence
Blockchain
Ongoing
From Vision to Impact: Building Web3 for Social Good — Collaborate. Innovate. Build for Good 2026
In Person
Aug 26 – Oct 25, 2026School of Computing and Information Systems, SMUTBA
Blockchain
Social Impact
Climate Tech
Ongoing
IEEE ClimateChain Global Hackathon
Online
Oct 5 – Oct 25, 2026IEEE TurkeyOnline$3K
Climate Tech
Blockchain
Artificial Intelligence
Ongoing
Build Privacy-First Apps on Midnight
Online
Sep 29 – Oct 26, 2026MidnightOnline$4K
Blockchain
Data Science
Ongoing
Bitmela Launchpad: Ideathon 01
In Person
Jul 22 – Oct 31, 2026BitmelaJaipur, India$2K
Artificial Intelligence
Cloud
Blockchain
Ongoing
BLI Legal Tech Hackathon 2
Online
May 15 – Nov 1, 2026Blockchain Legal InstituteOnline$20K
Blockchain
Artificial Intelligence
Fintech
Ongoing
MDBA Youth Blockchain Hackathon
Online
Feb 27 – Nov 1, 2026Blockchain Legal InstituteOnline$50K
Blockchain
Artificial Intelligence
Social Impact
Ongoing
Portaldot Hacker house 2026
Online
Sep 29 – Nov 6, 2026PortaldotOnline$5K
Blockchain
Social Impact
Data Science
Ongoing
Hack in Hills ’26
In Person
Sep 9 – Nov 21, 2026Galgotias University (GU), Greater NoidaManali, India
Blockchain
Game Development
Cloud
Ongoing
NexHack 2.0
In Person
Aug 15 – Nov 25, 2026Geeta University, Naultha, PanipatPanipat, India$600
Blockchain
Cloud
Artificial Intelligence
Ongoing
Crypto's Got Talent Season 2
Online
Sep 4, 2025 – Dec 31, 2026IoTeXOnline$100
Artificial Intelligence
Blockchain
Data Science
Ongoing
AlgoBharat Regional Hackathons
Online
Mar 19 – Dec 31, 2026AlgorandOnline
Blockchain
Fintech
Artificial Intelligence
Wednesday, October 7, 2026
Friday, October 9, 2026
Upcoming
Ethereum Jakarta Hackathon 2026
Hybrid
Oct 9 – Oct 10, 2026Ethereum JakartaTBA$2K
Blockchain
Cloud
Upcoming
Reap x 65labs Agentic Buildathon
In Person
Oct 9, 2026ReapSingapore, Singapore
Artificial Intelligence
Fintech
Blockchain
Upcoming
Hacklanta
In Person
Oct 9 – Oct 11, 2026progsuAtlanta, United States$14K
Artificial Intelligence
Data Science
Blockchain
Saturday, October 10, 2026
Upcoming
Vibeathon-2026
In Person
Oct 10, 2026Jawahar education societykharghar$25K
Generative AI
SaaS
AR/VR
Upcoming
Vibeathon--2026
In Person
Oct 10, 2026Jawahar education society, A.C.patil college of engineeringnavi mumbai$25K
Generative AI
Blockchain
IoT
Upcoming
The Hackathon
In Person
Oct 10 – Oct 11, 2026EnguerrandEcublens, Switzerland$5K
Blockchain
Fintech
Data Science
Upcoming
EvoHacks2026
Online
Oct 10 – Oct 11, 2026EvoHacksOnline
Artificial Intelligence
Blockchain
Past hackathons
Recently ended — many run again.
Monday, October 5, 2026
Saturday, October 3, 2026
Friday, October 2, 2026
Past
Stellar Barcelona Builders Evening x CryptoDays | Road to Lisbon — Build Session & HackMeridian Prep
In Person
Oct 2, 2026CryptoDays SpainBarcelona, Spain
Blockchain
Artificial Intelligence
Past
Metropolis Hackathon Builder Day: London | $250,000 in prizes
In Person
Oct 2, 2026Monad FoundationLondon, United Kingdom$250K
Blockchain
Fintech
Data Science
Thursday, October 1, 2026
Past
Stellar Madrid Builders Evening x CryptoDays | Road to Lisbon — Build Session & HackMeridian Prep
In Person
Oct 1, 2026CryptoDays SpainMadrid, Spain
Blockchain
Past
AI in Marketing: Boston Hackathon
In Person
Oct 1, 2026Alysha KhanBoston, United States
Artificial Intelligence
Blockchain
Fintech
Past
Product Bootcamp - Road to Colosseum Hackathon
In Person
Oct 1 – Oct 2, 2026Superteam GermanyBerlin, Germany
Blockchain
Past
DIGITAL AF Seoul: Hackathon - In person
In Person
Oct 1, 2026BuilderBaseSouth Korea
Blockchain
Artificial Intelligence
Fintech
Past
DIGITAL AF Seoul — Hackathon
Hybrid
Oct 1, 2026Builderbase HackathonsSeoul, South Korea
Artificial Intelligence
Game Development
Blockchain