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 →Caltech Longevity Hackathon 2026
May 22, 2026 - May 24, 2026
Prize Pool
Non-cash Prize
IATA ONE Record Hackathon – hosted by Cathay Cargo & CHAMP Cargosystems
Apr 24, 2026 - Apr 26, 2026
Prize Pool
$12.0K
Maximally SaaS Sprint: Build in 7 Days
Mar 31, 2026 - Apr 6, 2026
Prize Pool
₹487.5K
DevonomicsV1
Mar 20, 2026 - Mar 27, 2026
Prize Pool
Non-cash Prize
GenAI Dev Hackathon
Feb 24, 2026 - Mar 24, 2026
Prize Pool
$100
McGill AeroHacks
Mar 13, 2026 - Mar 15, 2026
Prize Pool
Non-cash Prize
EcoHack
Mar 11, 2026 - Apr 23, 2026
Prize Pool
Non-cash Prize
StarkHacks
Apr 17, 2026 - Apr 19, 2026
Prize Pool
Non-cash Prize
305 Hack Spr26 | SubmissionPortal | Register@305hackspring2026.vercel.app
Mar 20, 2026 - Mar 22, 2026
Prize Pool
Non-cash Prize
Kent Hack Enough 2026
Mar 28, 2026 - Mar 29, 2026
Prize Pool
Non-cash Prize
The 2030 AI Challenge
Mar 7, 2026 - Mar 28, 2026
Prize Pool
$435
Ordeflow 001
Mar 22, 2026 - Mar 24, 2026
Prize Pool
$500
ConHacks 2026
Mar 27, 2026 - Mar 29, 2026
Prize Pool
$3.0K
HackFW
Apr 3, 2026 - May 2, 2026
Prize Pool
$4.0K
Stevens QuackHacks
Feb 28, 2026 - Mar 1, 2026
Prize Pool
$1.2K
Raven Hacks VTL
Mar 14, 2026 - Mar 23, 2026
Prize Pool
Non-cash Prize
SASEHacks 2026
Mar 7, 2026 - Mar 8, 2026
Prize Pool
Non-cash Prize
RamadanHacks
Mar 16, 2026 - Mar 22, 2026
Prize Pool
$1.0K
HackFiesta Miami 2026 SubmissionPortal | Register@hackfiestamiami2026.vercel.app
Mar 9, 2026 - Mar 17, 2026
Prize Pool
Non-cash Prize
BuildAI 7
Mar 28, 2026 - Apr 4, 2026
Prize Pool
$22.5K