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$25 off$22
Live
Hack #3: Replit
Challenge
Build and ship a voice-powered app using Replit and ElevenLabs Voice Design or Voice Cloning
Prizes
$7,980 total1st Place
$3,990$3,000 in Replit credits
3 months ElevenLabs Scale ($990)
2nd Place
$2,660$2,000 in Replit credits
2 months ElevenLabs Scale ($660)
3rd Place
$1,330$1,000 in Replit credits
1 month ElevenLabs Scale ($330)
Build a voice-powered mobile or web app using Replit and ElevenLabs' Voice Design or Voice Cloning APIs, then submit a high-quality viral-style video demonstrating what you've built.
Replit is the fastest way to go from idea to app. Whether prototyping or building production-ready apps, Replit lets you securely vibe code any app in plain English with auth, database, security, testing and publishing built into the platform. Use Replit Agent to go from idea to deployed app with AI assistance, and publish your creation as a mobile or web app that anyone can use.
Voice Design lets you create unique AI voices from text descriptions — describe a voice and ElevenLabs generates it. Voice Cloning lets you clone any voice from audio samples. Both APIs unlock creative possibilities for building apps with custom, personalized voices.
What we're looking for
We want to see you build in public — share your progress, struggles, and wins as you go. Use Replit Agent to help you build, and push the boundaries of what's possible with AI-assisted development.
We're most excited to see apps that:
- Ship as a published app — deploy your project as a mobile or web app that others can actually use
- Use Voice Design or Voice Cloning creatively — create unique voices that make your app stand out
- Leverage Replit Agent 4 — try multi-artifact generation, canvas mode, and other advanced features
- Document your journey — tweet your progress, share screenshots, and build in public
Getting started
Replit's free tier lets you get started immediately. For this hackathon, we recommend using Replit Agent to help you build faster. Use the offer code below for a discount on Replit Core if you need more power.
Resources
- Replit Agent docs
- Build your first app on Replit
- Build and launch a mobile app
- Voice Design API quickstart
- Voice Cloning API quickstart
Tag us
When posting your submission on social media, tag @Replit and @elevenlabsio and use the hashtag #ElevenHacks.
Scoring
- Social posts: +50 pts per platform (X, LinkedIn, Instagram, TikTok)
- Placement: 1st place +400 pts, 2nd +200 pts, 3rd +150 pts
- Most Viral: +200 pts for the post with the most engagement
- Most Popular: +200 pts (community vote via emoji reacts)
Attendee offers
Replit Core discount
Use at checkout for $25 off your first month of Replit Core
Sign in to reveal this code
1 month ElevenLabs Creator
Free month of ElevenLabs Creator plan for all attendees
Sign in to claim this offer
Sign in to submit your project
Submissions (5)
N
Nemesis
3 Apr, 18:08
StoryDad is a bedtime-story app where parents clone their voice, generate personalized stories for their child, and play them back in that voice. It has a dark navy, starry, amber-glow UI with pages for signing in, recording a voice, generating stories, and listening to them.
C
Conductor Labs
4 Apr, 06:59
There's a really big potential problem in the coming future. The end of the world. And if that happens, how would we solve the solutions human need to survive from scratch? WildMind is a living, self-teaching persistent AI simulation where 30 independent AI agents — each a separate language model — are dropped into a procedurally-generated world with nothing. No language. No culture. No shared memory. No knowledge of survival, medicine, agriculture, fire, or each other. We use ElevenLabs to capture the language development. Agents develop proto-words — invented sound-sequences that acquire shared meaning through repeated co-occurrence with context. The sound "kroh-tuh" said near fire enough times, by enough agents, in enough interactions, becomes the tribal word for fire. This emergence follows real mathematical laws: Zipf's Law (word frequency distributions), Heaps' Law (vocabulary growth curves), and small-world network topology — the same patterns that govern every human language on Earth, appearing without instruction. You can listen along as the develop their language thanks to ElevenLabs, on a massive information dashboard where you can track every tick from every world hosted by Replit. The end goal is to publish **A Guide to Restarting Human Civilization** — a living, multimedia document synthesized from simulation data and made available to researchers, institutions, and anyone studying civilizational resilience.
