AI hackathons in Seattle

From evening build sessions to weekend agent competitions. Every AI hackathon in Seattle, verified daily. Most are free, and teams usually form on the spot.

Meetups Workshops Conferences Networking Free events

Sep

Sat

10:00 AM – 10:00 AM PDT

AI Token Economics Hackathon

City University of Seattleby Seattle Data, AI and Security

A two-week team hackathon on reducing the real cost of building and running AI systems, covering token optimisation, prompt efficiency and model cost reduction, closing with an in-person finale in Seattle on October 3.

HackathonFreeIntermediateDevelopersResearchersStudents

Sep

Sun

10:00 AM – 1:00 PM PDT

The Seattle Lovable Hackathon

AI House

The first official Seattle Lovable hackathon at AI House, where participants build and publish a working app in under two hours using an AI coding assistant. No prior coding experience required.

HackathonFreeBeginnerGeneralDevelopersBusiness

Oct

Sat

9:00 AM – 9:00 PM PDT

DubHacks 2026

University of Washington, Seattle Campusby DubHacks

The Pacific Northwest's largest collegiate hackathon returns to the University of Washington for a 36-hour build weekend, with AI and machine learning the dominant project category and around 100 industry mentors on site.

HackathonFreeAll levelsStudentsDevelopers

Oct

Sun

9:00 AM – 7:30 PM PDT

Seattle AI Week Claude Impact Lab Hackathon

by Build with Claude

A Seattle AI Week social-impact hackathon sponsored by Anthropic. The official listing identifies it as a Claude Impact Lab, a full-day build event with a civic or social-impact focus, organised with the Seattle community.

HackathonAll levelsDevelopersBusiness