callsheet.predictions for hackathons
round 01
callsheet · Colosseum Cypherpunk Hackathon

Projects.

1,574 projects.

Bull or Bear

Consumer Apps

Bull or Bear is the fastest crypto prediction game on Solana - connect your wallet and predict if Bitcoin will go up or down in the next 30 seconds. With lightning-fast rounds, near-zero fees, and quick payouts, you can turn market intuition into SOL rewards without any signup or complexity. Simply choose Bull or Bear, place your bet and watch the magic happen as winners automatically split the total pool when the round ends.

BullsEye

DeFi

Accountability as a Service is a Solana-based dApp that helps users stay committed to their goals by locking funds until their completion is verified. Each goal uses a 3-verifier majority system: users can pick one friend, while two random neutral verifiers ensure fairness. If the goal fails, funds are either burned or sent to the project wallet, based on the user’s choice. The platform integrates Solana Blinks — a Verification Blink for verifiers to confirm success and a Claim Blink for users to reclaim funds. The UI features three sections: a left dashboard (profile & actions), a right goal card (goal details & verification status), and a bottom social feed (recent completions and verifications). It blends transparency, community trust, and blockchain-backed accountability in a simple, engaging experience.

Bulwark

Infrastructure, Undefined

Bulwark is an autonomous security ops layer for smart contracts. It instantly analyzes Solana programs to spot risks and generate audit-ready reports so teams can get clear timelines, costs, and insights in minutes, not weeks.

Bumm

RWAs, Infrastructure

AI-Powered Solana Development. Generate, deploy, and manage Solana smart contracts with the power of AI. Build the future of decentralized applications in minutes, not months.

Bundl

Consumer Apps, Infrastructure, Stablecoins

One place to rule all your subscriptions. Bundl lets users track, fund, and manage all subscriptions in one place, pay a single stablecoin bill, and save via exclusive bundle discounts. Merchants can launch subscriptions and start accepting stablecoin payments instantly. (Coming soon) Payments split automatically to vendors, renewals run on-chain, and yield on idle assets offsets user costs. Users can manage, build or join sub bundles like “Trader Essentials” and pay a single recurring stablecoin payment instead of multiple fragmented ones. For wallets, CEXes, and other partners, it’s embeddable and white-label ready, turning them into distribution hubs for curated bundles and shared revenue.

Bundle

Consumer Apps, Infrastructure, Stablecoins

You earn in crypto. How do you buy groceries? Bundle provides a one-stop shop to spend your earnings directly. The user funds their account with cryptocurrency (such as $USDC on Solana) and instantly pays for services, meaning they never have to off-ramp to a bank account first.

BunkerCash

DeFi, RWAs

BunkerCash turns real-world property income into a liquid, composable yield token on Solana.

Burn & Claim Mobile

Consumer Apps, Undefined

Burn & Claim helps users reclaim SOL rent by cleaning up their wallets. It allows users to burn tokens and NFTs, close empty accounts, resize NFTs, and compress or decompress tokens using ZK compression. What makes Burn & Claim unique is that it’s the only burner on Solana that offers community monetization. Through its community affiliate program, users can choose to donate a portion of their reclaimed SOL back to their favorite community, creating a sustainable way for projects to earn while users clean up their wallets.

Butter Trade

Consumer Apps

Butter Trade is a Solana-native intelligence layer that turns Telegram and Discord conversations into real-time trading signals. It transforms social chatter into quantifiable data, enabling automated trades, community rewards, and a new economy where alpha finally pays.

BUYDL

DeFi, RWAs, Stablecoins

BUYDL lets users spend in the spirit of HODLing, without selling their crypto. Built on Solana, it enables instant, collateralized credit through Kamino Finance, so users can make real-world purchases while keeping exposure to their assets. The protocol borrows stablecoins against the user’s collateral (SOL, BTC, RWA, etc.) and pays merchants directly on-chain. It solves the core problem of crypto spending: liquidity without liquidation. Fast, low-cost, and borderless, BUYDL democratizes access to the kind of credit optimization once reserved for the wealthy, bringing it to everyday users worldwide. In its first release, BUYDL will be made available to hundreds of thousands of Cryptorefills customers, enabling them to shop globally for flights, hotel stays, gift cards, and eSIMs while holding on to their digital assets.

BuyMeAToken

DeFi, Consumer Apps, Undefined

BuyMeAToken, a much-better web3 version of Buy Me a Coffee and Ko-fi. Creators can receive support from anyone, anywhere, no banks, no borders, no middlemen. Supporters can send any Solana token; and creators receive SOL instantly.

Buyve

Consumer Apps, Undefined

Buyve is building the future of live streaming culture on the Solana memo program. Stop sending tips. Start Buyve. Fans don't just send tips. They buy into their streamer's coin, engage through messages and reactions, and become part of the journey.

Buzzing

DeFi, Consumer Apps

Buzzing is building the first personalized prediction market. By reducing creation and liquidity costs to near zero, we can expand supply and let users easily discover topics they care about and place quick bets.

Bytebound Publishing

Consumer Apps, Undefined

The First Digital Publishing Company Exclusively for AI. Publishing the Future of AI-Generated Content across movies, music, podcasts, and books. Powered by Solana blockchain for verifiable ownership and transparent royalties.

ByteGrid

Consumer Apps, Infrastructure, Undefined

ByteGrid is a no-code automation builder for Solana — enabling anyone to create on-chain workflows using visual nodes. Connect on-chain and off-chain apis without writing any code seamlessly. Think of it as n8n, but with Solana actions and triggers also.

Cachin

DeFi, Consumer Apps, Undefined

Cachin is a Solana-native payments app for instant, low-fee QR and on/off-ramp in LATAM. Cachin enables seamless fiat-to-crypto and crypto-to-fiat flows with QR payments, passkey authentication, and USDC settlement on Solana. it focuses on real-world merchants: instant confirmations.

Caden

RWAs, Consumer Apps

Making time slots tradable and new assets. Using Solana's native 400ms killer speed to eliminate T+1&2 risks and being solana mobile native. Trade the future, not the present - CFD positions on T+0 vs T+2 price spreads with 3x leverage on Solana.

Calm Connection

Consumer Apps, Undefined

Calm Connection is a wellbeing platform that supports children with anxiety and their parents through journaling, tools, and AI-guided resources, helping families feel calmer, more connected, and better supported in everyday life.

CalSol

DeFi, Consumer Apps

CalSol is a revolutionary Web3 application that bridges Google Calendar with Solana blockchain technology. Users can automatically execute Solana transactions (SOL transfers, token swaps) based on their calendar events. When a calendar event triggers, CalSol automatically performs predefined blockchain actions, creating a seamless integration between traditional productivity tools and decentralized finance. Key Features: - Google Calendar integration with automatic event detection - Solana blockchain integration for SOL transfers and token swaps - Smart contract automation based on calendar events - Real-time transaction monitoring and history - Secure wallet management and transaction execution - Web3 onboarding for non-crypto users Built with React, TypeScript, Solana Web3.js, Google Calendar API, and deployed on Vercel with Render backend.

Campfire

DeFi, RWAs, Consumer Apps

Campfire is building energy capital markets on Solana. We are a renewable energy investment platform allowing investors to tokenise assets and fund new developments. Campfire pairs renewables with afforestation grants & biomass production to provide sustainable yield while an energy asset is under construction. We are an all-in-one ecosystem with; funding pools, a real-world asset DEX, and portfolio tools.

Capitola

DeFi, Consumer Apps

Capitola is a prediction markets meta-aggregator that enables users to trade all events at the best price.

Capture The SOL

Consumer Apps

An on-chain education platform where anyone can create a CTF, and prizes are settled immediately on-chain. Players solve challenges, learn real-world skills, and earn tokens instantly for completing problems.

Carbon On Chain

DeFi, RWAs, Consumer Apps

We're building a reliable blockchain-based system that transforms how carbon credits are created, traded, and tracked. By combining Solana's efficiency with built-in compliance and KYC verification, we help industries securely tokenize real-world assets, ensure transparency in every transaction, and simplify participation in the global carbon economy.

CardPass

Consumer Apps

"A Solana blockchain-based decentralized recruitment platform. When job seekers mint their resumes as compressed NFTs (cNFTs), they gain complete ownership of their data while enabling transparent search and matching. Public profiles (skills, experience, region) are stored on-chain for searchability, while sensitive resume data is encrypted on IPFS with access control managed through zk-compression. The platform only facilitates access permissions without owning any data. Through WalletConnect authentication and smart contract-based contact management, we've solved the data monopoly of traditional platforms. Successful candidates' resumes become tradeable on NFT marketplaces, creating a new talent network where individual careers hold real asset value."

CareChain

Consumer Apps, Infrastructure, Undefined

CareChain is a decentralized health record platform built on Solana, designed to unify patient data across hospitals and clinics in Indonesia. By leveraging blockchain, CareChain ensures secure, tamper-proof, and interoperable medical records that follow patients wherever they go. CareChain provides hospitals, doctors, and patients with a seamless way to access and share trusted health information in real time.

Carepanion

Consumer Apps

Carepanion is building the emotional intelligence layer for companion robots to address global loneliness and eldercare challenges. Powered by Solana, we enable AI to learn empathy directly from the seniors it aims to serve. Our mission is to create emotionally responsive robots capable of genuine connection and be friends to millions of older adults worldwide.

CargoEscrow

Infrastructure, Stablecoins

CargoEscrow solves the trust and payment risk in logistics. We act as a secure escrow service where shippers funds are protected until their goods are delivered and confirmed. This guarantees carriers get paid promptly and gives shippers peace of mind. Our Solana escrow platform uses smart contracts to automate the entire process. We've encoded the Incoterms 2020 rules directly into the contract logic, so obligations and payments execute automatically the moment delivery is verified on-chain. Our platform includes real-time shipment tracking, automated payment triggers upon delivery confirmation, and a secure dispute resolution hub to handle any issues fairly. For shippers, it's a guarantee that their money is protected. For carriers, it's the promise of fast, guaranteed payment. We're not just processing payments; we're building trust and streamlining cash flow for the entire industry.

carr

Consumer Apps

Evolution is an on-chain pet feeding and evolution game where every pet is a unique NFT. Players can adopt, feed, and evolve their pets directly on the blockchain. All pet data — including growth, attributes, and evolution history — is fully stored on-chain to ensure transparency, fairness, and verifiable ownership.

Carsa

DeFi

Carsa is a blockchain-powered loyalty and rewards platform that transforms local shopping into a self-sustaining digital economy. It enables small businesses to reward customers with Lokal Tokens community-driven digital assets that can be earned when shopping locally and spent across multiple neighborhood merchants. Unlike traditional loyalty points, Lokal Tokens are productive assets that can generate yield when staked, contribute to a user’s LocalRank reputation, and eventually unlock access to micro-credits within the community. Built on Solana for speed and transparency, Carsa provides both consumers and merchants with an easy-to-use web dashboard for tracking rewards, transactions, and insights, creating a transparent, data-driven ecosystem where every purchase strengthens the local economy.

Cascade

DeFi, Consumer Apps

A fast and secure decentralised fundraiser platform.