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 →Bot To Agent by MLH Hack Days
Apr 26, 2026 - Apr 27, 2026
Prize Pool
Non-cash Prize
Claude x Hoagie Vibe-a-thon
Apr 10, 2026 - Apr 11, 2026
Prize Pool
Non-cash Prize
Hack the Bay Launch 2026
Apr 10, 2026 - Apr 11, 2026
Prize Pool
Non-cash Prize
Aikshetra Tech - Hackathon
Apr 10, 2026 - Apr 11, 2026
Prize Pool
Non-cash Prize
Biggest Little Hackathon 2026
Apr 10, 2026 - Apr 12, 2026
Prize Pool
$5.0K
HackUP
Apr 10, 2026 - Apr 11, 2026
Prize Pool
$5.0K
Claude Builder Club Spring Hackathon
Apr 10, 2026 - Apr 11, 2026
Prize Pool
Non-cash Prize
Berkeley Build Guild - Hardware and Programming Workshop
Apr 17, 2026 - Apr 18, 2026
Prize Pool
Non-cash Prize
SDxUCSD Agent Hackathon
Apr 11, 2026 - Apr 12, 2026
Prize Pool
$1.5K
Calgary Maker Faire 2026 Designathon University Level
May 1, 2026 - May 3, 2026
Prize Pool
$1.9K
OCSEFHacks 2026
Apr 18, 2026 - Apr 19, 2026
Prize Pool
Non-cash Prize
Plug and Play Foundation Small Business Innovation Sprint Hackathon
Apr 24, 2026 - Apr 25, 2026
Prize Pool
$1.5K
HackSMU VII
Apr 11, 2026 - Apr 12, 2026
Prize Pool
Non-cash Prize
Cursor Hackathon
Apr 10, 2026 - Apr 11, 2026
Prize Pool
Non-cash Prize
Dolphin Hacks
Apr 10, 2026 - Apr 11, 2026
Prize Pool
Non-cash Prize
OAHL Hardware Hack: Build the Agent-to-Hardware Interface Layer
Apr 11, 2026 - Apr 17, 2026
Prize Pool
Non-cash Prize
Reform Hacks
Apr 11, 2026 - Apr 12, 2026
Prize Pool
$300
Hackonomics 2027
Jul 1, 2026 - Jun 1, 2027
Prize Pool
Non-cash Prize
NO//CODE : BUILD CHAOS
Apr 21, 2026 - Apr 22, 2026
Prize Pool
₹7.0K
Draft Hackathon
Apr 10, 2026 - Apr 11, 2026
Prize Pool
Non-cash Prize