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 →BearHacks 2027
Apr 23, 2027 - Apr 25, 2027
Prize Pool
$10.0K
DARK ARMY CTF 2026
Aug 8, 2026 - Aug 9, 2026
Prize Pool
₹5.0K
Dum, Duber and Dumber Hackathon
Jul 11, 2026 - Jul 12, 2026
Prize Pool
$400
Orchidhackx
Jul 10, 2026 - Jul 11, 2026
Prize Pool
$855
2026 CSESoc Flagship Hackathon
Jul 10, 2026 - Jul 11, 2026
Prize Pool
$1.3K
OpenAI Build Week
Jul 13, 2026 - Jul 21, 2026
Prize Pool
$100.0K
CSC Summer Impactathon
Jul 9, 2026 - Aug 10, 2026
Prize Pool
$80
Build with Gemma NYC: On-Device AI for Healthcare
Jul 24, 2026 - Jul 25, 2026
Prize Pool
$2.0K
Break the Barrier
Sep 1, 2026 - Nov 2, 2026
Prize Pool
$9.0K
Recruit Holdings Hackathon “Innovation Cup”
Sep 25, 2026 - Sep 27, 2026
Prize Pool
$70.0K
AI Healthcare Hack NYC - by Arya Health & Twilio AI Startup Searchlight
Jul 10, 2026 - Jul 11, 2026
Prize Pool
Non-cash Prize
Hack Days in Bansal
Aug 1, 2026 - Aug 2, 2026
Prize Pool
₹1.0K
OpenAI x START Warsaw
Jul 10, 2026 - Jul 11, 2026
Prize Pool
Non-cash Prize
GDG Windsor - Build with Gemma Hackathon
Jul 14, 2026 - Jul 24, 2026
Prize Pool
Non-cash Prize
Designing Intelligent Applications for Health and Well Being at SJTU
Jul 8, 2026 - Jul 9, 2026
Prize Pool
Non-cash Prize
Westlake FidHacks 2026
Jul 9, 2026 - Jul 10, 2026
Prize Pool
$450
Daybot Commerce Hackathon
Jul 11, 2026 - Jul 12, 2026
Prize Pool
Non-cash Prize
Beyond Tomorrow Summit
May 15, 2026 - Jul 8, 2026
Prize Pool
$1.8K
SourceHacks V1
Dec 11, 2026 - Dec 12, 2026
Prize Pool
$250
MYHack: ISNA 2026
Sep 5, 2026 - Sep 6, 2026
Prize Pool
$500