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 →Build with AI × MLH Hack Day
Apr 23, 2026 - Apr 24, 2026
Prize Pool
Non-cash Prize
Efrei IBM hackathon
Apr 22, 2026 - Apr 23, 2026
Prize Pool
Non-cash Prize
Hackstreet 2k26
Apr 23, 2026 - May 1, 2026
Prize Pool
₹5.0K
Tyee Hackathon 2026
Apr 23, 2026 - Apr 27, 2026
Prize Pool
Non-cash Prize
KeanUHackThis 2026
Apr 25, 2026 - Apr 26, 2026
Prize Pool
$3.0K
HuskyHack 2026
May 1, 2026 - May 2, 2026
Prize Pool
$900
LionHacks
Apr 22, 2026 - Apr 25, 2026
Prize Pool
Non-cash Prize
DevFest + AI Hackathon Spring 2026 — Build with AI
Apr 23, 2026 - Apr 24, 2026
Prize Pool
Non-cash Prize
Google Cloud Rapid Agent Hackathon
May 1, 2026 - Jun 11, 2026
Prize Pool
$50.0K
Test Hackathon
Apr 21, 2026 - Apr 22, 2026
Prize Pool
Non-cash Prize
Algiers'UP 4
Apr 22, 2026 - Apr 25, 2026
Prize Pool
Non-cash Prize
Status: EndedThe Turing Test Hackathon 2026
May 1, 2026 - Jun 15, 2026
Prize Pool
$100.0K
Github readme generation
Apr 22, 2026 - Jun 2, 2026
Prize Pool
Non-cash Prize
Project Stellar
Jun 6, 2026 - Jun 7, 2026
Prize Pool
$100
Ship to Prod - Agentic Engineering Hackathon
Apr 23, 2026 - Apr 24, 2026
Prize Pool
$23.7K
AcademiesHacks 2026
Apr 25, 2026 - Apr 26, 2026
Prize Pool
$2.8K
lahacks-testing
Apr 22, 2026 - Apr 30, 2026
Prize Pool
Non-cash Prize
Status: EndedPortaldot Online Mini Hackathon S1
Apr 20, 2026 - May 31, 2026
Prize Pool
$3.5K
Hacktech by Caltech 2026
Apr 25, 2026 - Apr 26, 2026
Prize Pool
$66.4K
Product@TAMU Projects Spring 2026 Demo Day
Apr 21, 2026 - Apr 22, 2026
Prize Pool
$250