# Solana Frontier Hackathon Registration is now open

[🏔️FrontierLive Now](https://colosseum.com/frontier)

Submissions due 09d: 17h: 02m: 20s

16,358+ builders [Register Now](https://arena.colosseum.org/hackathon)

# Cloak

C4 Brazil

[Website](https://www.cloak.ag/) [X / Twitter](https://x.com/cloak_xyz)

A privacy layer for Solana enabling confidential transactions through decentralized pools and miner-driven anonymity sets, protecting users from transaction tracing.

## Team

Arthur Bretas  
 Marcelo Feitoza  
 Matheus Macedo Santos  
 Victor Carvalho

## More from Cohort 4

**Archer Exchange**  
C4·India  
An MEV-resistant decentralized exchange on Solana using dual batch flow auctions to offer competitive pricing and reduce latency races.

**Capitola Labs**  
C4·United States  
Capitola Labs is a product-led research and development firm building novel information finance applications. Capitola Labs’ first product is Vistadex, a full-stack RFQ prediction markets platform on Solana enabling users to trade all events listed across major venues at the best price.

**Credible**  
C4·United Arab Emirates  
A stablecoin-powered remittance rail on Solana for cross-border business payments, offering guaranteed FX rates and instant settlement.