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The Playbook
AI hackathon guides, startup ideas and stories from builders in Vilnius.
NewThe Thing We Mean by Unfair
Unfair Weekend is built around the edge you bring, the AI-native moment we are living in, and the magic that happens when different advantages collide in one room.
How to Win Unfair Weekend: Build Less, Prove More
The winning project will not necessarily have the most features or the biggest market slide. It will make the strongest case that the idea is original, the product works, and the opportunity matters.
What to Build at Unfair Weekend
AI made building cheaper — which means weak ideas have less protection. Our Request for Startups: twelve opportunities worth exploring, and how to find the version of an idea only your team would notice.
Articles
Field Notes
Founder stories, build lessons, and product breakdowns from the Unfair Weekend community.
NewKilo Co‑Found Special Track: AI Agents for Everyday Well‑Being
We are partnering with Kilo Co-Found on a special track for agentic consumer products in health, family care, midlife performance, stress regulation and beyond.
Can You Join an AI Hackathon Without Coding Experience?
You can join Unfair Weekend without a programming background. Learn how to prepare, choose a small project and test an AI-built demo.
Coming to Unfair Weekend? Your Vilnius Travel Guide
Plan your trip to Unfair Weekend at ISM University in Vilnius: event dates, venue, airport connections, accommodation planning and student credits.
She Didn't Win the Hackathon. It Still Took Her to San Francisco.
From Icebreaker to Maveriq, Neurex to Sonna, Vilnius to San Francisco: Goda's path shows what the earliest stage of startup building really looks like.
They Built a "Deal Radar" for Vinted in Four Days (and It Actually Worked)
Reselling has a special kind of heartbreak: you finally find the perfect vintage hoodie for €15, blink, and it's gone. Or worse—you buy it, list it, and realize you thought it was a deal… but the market doesn't agree.
They Built a $60,000 Focus Group for $6
Meet FocusAI, the grand prize winner of Lithuania's Student Vibecoding Hackathon. Taran and Aarti entered with a hypothesis: what if you could simulate an entire focus group using AI personas that actually argue with each other?
How a Neighbor's Dog Inspired the Most Loved Project at Vibecoding Hackathon
Ravi Joshi didn't come to the hackathon with a complex business plan. He came with a memory of his neighbor's elderly father. Five days later, Walky Doggy won both the Public Vote prize and a special track for Best Vibecoding Project.
19 Years Old. Zero Coding Experience. Full App in Three Days.
Karolis arrived at the hackathon with barely any coding experience. Three days later, he had Habiton: a mobile habit-challenge app with profiles, friends, wallets, Gemini photo verification, achievements, and shareable victory cards.
170 Builders, 5 Countries, Zero Traditional Coding
Last week, Vilnius became the home of something unprecedented in Lithuania: the country's largest in-person vibecoding hackathon. Over five days, 170 builders from 12 universities gathered to build functional applications – without writing a single line of traditional code.
Can You Join an AI Hackathon Without Coding Experience?
You can join Unfair Weekend without a programming background. Learn how to prepare, choose a small project and test an AI-built demo.
Coming to Unfair Weekend? Your Vilnius Travel Guide
Plan your trip to Unfair Weekend at ISM University in Vilnius: event dates, venue, airport connections, accommodation planning and student credits.
She Didn't Win the Hackathon. It Still Took Her to San Francisco.
From Icebreaker to Maveriq, Neurex to Sonna, Vilnius to San Francisco: Goda's path shows what the earliest stage of startup building really looks like.
They Built a "Deal Radar" for Vinted in Four Days (and It Actually Worked)
Reselling has a special kind of heartbreak: you finally find the perfect vintage hoodie for €15, blink, and it's gone. Or worse—you buy it, list it, and realize you thought it was a deal… but the market doesn't agree.
They Built a $60,000 Focus Group for $6
Meet FocusAI, the grand prize winner of Lithuania's Student Vibecoding Hackathon. Taran and Aarti entered with a hypothesis: what if you could simulate an entire focus group using AI personas that actually argue with each other?
How a Neighbor's Dog Inspired the Most Loved Project at Vibecoding Hackathon
Ravi Joshi didn't come to the hackathon with a complex business plan. He came with a memory of his neighbor's elderly father. Five days later, Walky Doggy won both the Public Vote prize and a special track for Best Vibecoding Project.
19 Years Old. Zero Coding Experience. Full App in Three Days.
Karolis arrived at the hackathon with barely any coding experience. Three days later, he had Habiton: a mobile habit-challenge app with profiles, friends, wallets, Gemini photo verification, achievements, and shareable victory cards.
170 Builders, 5 Countries, Zero Traditional Coding
Last week, Vilnius became the home of something unprecedented in Lithuania: the country's largest in-person vibecoding hackathon. Over five days, 170 builders from 12 universities gathered to build functional applications – without writing a single line of traditional code.
Can You Join an AI Hackathon Without Coding Experience?
You can join Unfair Weekend without a programming background. Learn how to prepare, choose a small project and test an AI-built demo.
Coming to Unfair Weekend? Your Vilnius Travel Guide
Plan your trip to Unfair Weekend at ISM University in Vilnius: event dates, venue, airport connections, accommodation planning and student credits.
She Didn't Win the Hackathon. It Still Took Her to San Francisco.
From Icebreaker to Maveriq, Neurex to Sonna, Vilnius to San Francisco: Goda's path shows what the earliest stage of startup building really looks like.
They Built a "Deal Radar" for Vinted in Four Days (and It Actually Worked)
Reselling has a special kind of heartbreak: you finally find the perfect vintage hoodie for €15, blink, and it's gone. Or worse—you buy it, list it, and realize you thought it was a deal… but the market doesn't agree.
They Built a $60,000 Focus Group for $6
Meet FocusAI, the grand prize winner of Lithuania's Student Vibecoding Hackathon. Taran and Aarti entered with a hypothesis: what if you could simulate an entire focus group using AI personas that actually argue with each other?
How a Neighbor's Dog Inspired the Most Loved Project at Vibecoding Hackathon
Ravi Joshi didn't come to the hackathon with a complex business plan. He came with a memory of his neighbor's elderly father. Five days later, Walky Doggy won both the Public Vote prize and a special track for Best Vibecoding Project.
19 Years Old. Zero Coding Experience. Full App in Three Days.
Karolis arrived at the hackathon with barely any coding experience. Three days later, he had Habiton: a mobile habit-challenge app with profiles, friends, wallets, Gemini photo verification, achievements, and shareable victory cards.
170 Builders, 5 Countries, Zero Traditional Coding
Last week, Vilnius became the home of something unprecedented in Lithuania: the country's largest in-person vibecoding hackathon. Over five days, 170 builders from 12 universities gathered to build functional applications – without writing a single line of traditional code.
Replay
Watch the 2025 livestreams
Relive last year’s event: the Demo Day pitches and the full awards ceremony.
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