Cal Hacks 9.0 is here! The world's largest collegiate hackathon makes its return bringing together the brightest and most ambitious hackers, designers, and creators.


Join and build your heart out!


  • Submit your hack by 10/16 1PM PDT and make sure to add your teammates! You'll have until 2PM to continue hacking and editing your submission, but the project must be submitted by 1PM.
  • Include an image of your project and GitHub repository for any code to be considered.
  • Include the table number you're presenting from and the Hacker ID of one team member in your group.
  • Continuing projects and cross-posted submissions will not be accepted.

Hackathon Sponsors


$44,270 in prizes
Cryptocurrency logo Prizes paid in cryptocurrency

1st Place Overall

$2,000 Cash / MLH Fellowship Fast Track Interview / MLH Winner Pins

2nd Place Overall

Electric Scooters / MLH Fellowship Fast Track Interview / MLH Winner Pins

3rd Place Overall

Corsair Mechanical Keyboards / MLH Fellowship Fast Track Interview / MLH Winner Pins

Best Beginner Hack

Nintendo Switches

Hack on Web3
Cryptocurrency logo

$1000 USD in ETH

Hack for Health

Apple Watches

Hack for Fun

Air Fryers

Sponsor Scavenger Hunt

(3 versions of the stamp card)
Each hacker is provided with their own sponsor card! Each sponsorship table has a unique stamp. Get all the stamps on your card, write your name on the back, and submit it to the check-in table box for a chance to participate in our raffle!
2 winners chosen.
Prizes: polaroid cameras, film, and accessories.

Sponsor Workshop Raffle

(# of workshops attended = # of submissions)
Each time you attend a sponsor workshop, make sure to check in with a Cal Hacks director to get your submission in! There are three workshops per hour from 3 PM - 9 PM, so make sure to attend as many as you can! *this is only for sponsor workshops*
3 winners chosen.
Prizes: ✨ Air Pods! ✨

Cockroach Labs Tech Prize

Challenge: Best Use of CockroachDB Serverless

Winner: iPad Mini for each member of the team (up to 4)

Cohere Tech Prize

(1) creativity
(2) usability/usefulness of the hack
(3) the best use of the Cohere API.

Winner: $500 visa gift card and 5,000 Co:here credits

Intersystems Tech Prize

Challenge: Innovation, best use of InterSystems FHIR services

1st place: $2000

2nd place: $1000
3rd place: 7-month access to Coursera and swag pack for each team member

Jump Crypto Tech Prize

Challenge: Build the best blockchain application during Cal Hacks

Prizes (2 winning teams):
1st team: $2500

2nd team: $2500
Extra: Wormhole will award up to $10,000,000 for critical security vulnerabilities (see

Pi Network Tech Prize

Prize: For each member of the winning team: one Nintendo switch, and an interview opportunity for a position at Pi Network (either internship or full-time).
Guidline info here:

Ripple Tech Prize

Create an app or tool that improves the lives of people in the real world using any of the SDKs or APIs for the XRP Ledger.

1st place: $1000 in Amazon Gift Cards split amongst the team

2nd place: $500 in Amazon Gift Cards split amongst the team

Solana Tech Prize

Build a program (smart contract) and or application that interacts with the SOLANA Blockchain.
The github source code should be presented to the judges

Prizes (2 winning teams):
1st place: $1500

2nd place: $500
3rd place: $500

Guidline info here:

Sonr Tech Prize

Description: The Sonr motor-node is a plug-in that you can use to integrate rich crypto features into your applications without additional overhead.
Challenge: Best use of Sonr Flutter SDK
Apple AirPod Maxes

Quest: Integrate Sign-in with Sonr
25 SNR for every entry

Mission: Best contribution to the OSS Sonr repo
$100 DoorDash credit + Skip internship interview first round for Summer 2023

Avalanche Tech Prize (3)

$1k USDC for 1st
$500 USDC for 2nd
Guidelines here:

Zepp Tech Prize


Challenge: Most Innovative App
70% technical complexity
30% creativity

Winner: USD $1,500
Additional GT4 Watch if the App is uploaded to the Zepp App Store

Google Cloud Prize

Challenge: Best Use of Google Cloud
Use any Google Cloud product, including Firebase, and submit.
Category is for all skill levels and use-levels.

1st place: Google Cloud-branded backpack for each team member

Runner-up: Specialty Google Cloud swag boxes

Eluvio Prize

Build the Best Web3 Media Experience or Concept Utilizing the Content Fabric
Key APIs are available at and, but feel free to peruse all of the open source content.

Winner: opportunity to develop their project post event with a grant up to $10,000 from, a party and visit to the Eluvio HQ, and opportunities for summer internships.

[MLH] Most Creative Use of Twilio

Twilio Swag Box & GameGo Console / Twilio allows you to incorporate mobile messaging, phone calls and a ton of other awesome communication features right into your hackathon project using a web service API. Are you building an e-commerce website and want to send text notifications or email confirmations once an order is completed? Or maybe you'd like to verify users based on their mobile numbers? Twilio makes all this possible and more. Build a hack that simplifies your life using any Twilio API for a chance to win some awesome prizes! Get started with $50 in free credit!

[MLH] Best Domain Name from Branded Backpack / Register a .Tech domain name using during the weekend for your chance to win a branded backpack for you and each member of your team! Each team may submit one entry per person on the team. The more creative the domain the better!

[MLH] Most Creative Use of GitHub

GitHub Octocat Puzzle & Sticker bundle / GitHub is one of the best ways to collaborate, push code, get feedback, and show the world what you’ve built during a hackathon. To take it a step further, GitHub is now offering you access to industry tools, events & learning resources through something called GitHub Global Campus. Win this weekend’s Most Creative Use of GitHub prize category, first by signing up for GitHub Global Campus and second by using a GitHub repository to host your hackathon project’s code! Make sure your use of GitHub stands out with a detailed ReadMe page, meaningful pull requests and collaboration history, and even a GitHub pages deployment!

[MLH] Best Use of Microsoft Cloud for Your Community

LinkedIn Premium 12-Month subscription and Xbox Ultimate 3-Month Game Pass / Bring your idea to life using the Microsoft Cloud - automatically build and deploy a full stack web app from a code repository, create and train a Machine Learning model, develop business applications with little to no code using Power Platform, and more! View our recommended popular solutions in the Education Hub at

Build your hackathon project with the Microsoft Cloud that tackles a social impact issue of your choice, and have a chance to win a LinkedIn Premium 12-Month subscription and an XBox Ultimate 3-Month Game Pass.

[MLH] Best Accessibility Hack sponsored by Fidelity

Fidelity Branded Wireless Charger / At Fidelity, accessibility is viewed as a major key to the success of their business, which is why they are challenging you to come up with innovative ways to make tech more accessible! We want you to use your hacking skills to find and build solutions that put opportunities and resources within reach to all communities. The team with the best accessibility hack will win a Fidelity branded wireless charger for each team member!

Devpost Achievements

Submitting to this hackathon could earn you:



Judging Criteria

  • Application
    Does the project have any feasible application in real life? Does it seem like something that someone could use or would actually have a benefit in the real world?
  • Functionality/Quality
    Is the project free of major bugs? Does it look appealing? The UI/UX doesn’t have to be absolutely perfect, but if we're having a hard time understanding the project by looking at it, there may be a problem.
  • Creativity
    Is this project unique and innovative? Is it a solution to a problem we have never seen before? A better way of doing something?
  • Technical Complexity
    The team should display a good level of knowledge in terms of the technology they’ve used in implementing their project.

Questions? Email the hackathon manager

Tell your friends

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.