Online Web3 Hackathons
Participate from anywhere in the world. Browse online Web3 and blockchain hackathons, compete for prizes, and build innovative projects.
View all with full filters →AI Lodge Hackathon 2026
Sep 22, 2026 - Oct 19, 2026
Prize Pool
Non-cash Prize
Build Multiplayer Data Science Agents · PyMC Labs
Oct 9, 2026 - Oct 10, 2026
Prize Pool
Non-cash Prize
Hack the Harvest
Nov 14, 2026 - Nov 15, 2026
Prize Pool
Non-cash Prize
ML Empowerment Build Challenge 3.0 - FREE Prizes for EVERYONE
Sep 5, 2026 - Oct 5, 2026
Prize Pool
Non-cash Prize
YC Fall 2026 x Moss: The Zero Latency Builder Sprint
Sep 6, 2026 - Sep 23, 2026
Prize Pool
₹50.0K
INDUX 5.0-2026
Nov 2, 2026 - Nov 3, 2026
Prize Pool
₹225.0K
AI Agents for Founders Challenge — HETIC 2026
Nov 4, 2026 - Dec 18, 2026
Prize Pool
€997
Business + AI Hackathon
Sep 24, 2026 - Sep 25, 2026
Prize Pool
Non-cash Prize
#SFTechWeek - Decision-Grade AI @ Stanford ⚡️ A Buildathon on LLM Trust
Oct 9, 2026 - Oct 10, 2026
Prize Pool
Non-cash Prize
Agentic Enterprise AI Hackathon — Box + AWS
Oct 16, 2026 - Oct 17, 2026
Prize Pool
Non-cash Prize
Jāgriti Hacks
Sep 25, 2026 - Sep 29, 2026
Prize Pool
$850
Teens Hack Houston Hackathon
Nov 14, 2026 - Nov 21, 2026
Prize Pool
Non-cash Prize
ONHacks
Nov 20, 2026 - Nov 21, 2026
Prize Pool
Non-cash Prize
UGAHacks CADathon
Oct 24, 2026 - Oct 25, 2026
Prize Pool
Non-cash Prize
Desert Dev Lab 2027
Apr 24, 2027 - Apr 25, 2027
Prize Pool
$1.0K
DevFest Münster 2026: Agentic AI Hackathon
Nov 20, 2026 - Nov 21, 2026
Prize Pool
Non-cash Prize
.devHacks 2027
Feb 19, 2027 - Feb 21, 2027
Prize Pool
Non-cash Prize
Redhawk Builds 2026
Nov 7, 2026 - Nov 8, 2026
Prize Pool
$3.5K
HackUCD x Stripe
Oct 8, 2026 - Oct 9, 2026
Prize Pool
€4.0K
CCT IT CLUB X INOVEXHQ HACK DAYS
Sep 30, 2026 - Oct 1, 2026
Prize Pool
Non-cash Prize