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 →HackHayward 2026
Mar 21, 2026 - Mar 22, 2026
Prize Pool
Non-cash Prize
HHDemo
Mar 10, 2026 - Mar 11, 2026
Prize Pool
Non-cash Prize
Melange On-Device AI Hackathon
Mar 10, 2026 - Mar 12, 2026
Prize Pool
$1.5K
HackRPI2026 Worst UI Competition
Mar 14, 2026 - Mar 15, 2026
Prize Pool
Non-cash Prize
HARD MODE: Hardware x AI Hackathon
Mar 9, 2026 - Mar 10, 2026
Prize Pool
Non-cash Prize
Next Level Hackathon
Mar 10, 2026 - Mar 22, 2026
Prize Pool
$7.0K
Hackdays Lucknow
May 17, 2026 - May 18, 2026
Prize Pool
Non-cash Prize
Smart Horizon 2026: 48-Hour International Hackathon
Mar 10, 2026 - Mar 20, 2026
Prize Pool
₹2.4M
KiwiHacks 2026
May 1, 2026 - May 2, 2026
Prize Pool
Non-cash Prize
Hack Esbjerg
Mar 19, 2026 - Mar 20, 2026
Prize Pool
Non-cash Prize
RWA Demo Day
Mar 9, 2026 - Mar 31, 2026
Prize Pool
$10.0K
CATALYST 2026: UI/UX Designathon
Mar 20, 2026 - Mar 22, 2026
Prize Pool
$435
Status: EndedINITIATE: The Initia Hackathon
Mar 16, 2026 - Apr 15, 2026
Prize Pool
$25.0K
Weber State AI Hackathon 2026
Mar 21, 2026 - Apr 4, 2026
Prize Pool
$1.8K
Interlake Programming Club Hackathon
Mar 12, 2026 - Mar 19, 2026
Prize Pool
Non-cash Prize
Contrathon '26
Mar 31, 2026 - Apr 10, 2026
Prize Pool
$101
Ideathon 2026
Mar 10, 2026 - Apr 25, 2026
Prize Pool
₹45.0K
Design for Everyone by The Merge
Mar 10, 2026 - Mar 11, 2026
Prize Pool
Non-cash Prize
ZOOTech - Cursor Hackathon
Mar 14, 2026 - Mar 15, 2026
Prize Pool
$700
Durham HackDay
Mar 16, 2026 - Mar 17, 2026
Prize Pool
£350