Hardwares are internally exploited. $200 tech gets compromised. Here's how Coldstar makes that impossible:

Turn any USB stick you already own into a hardware wallet with @coldstar_sol:

keys decrypted only in memory, offline QR signing, open source, one-line install, 1% fee capped at $10.

Three-quarters of a million dollars signed in its first ten weeks, according to the team. W!

Next picks from the @colosseum Crypto World’s Fair. This time: Infrastructure, Security & Privacy.🛡️Here is my personal pick 👇

Security:
@coldstar_sol - turns any USB drive into an offline signer for Solana. Your keys exist for a split second, then they are gone
@hackhackai - AI sSolana auditors and checked with real exploit tests
@ProofOfExploit - smart contract audits for early Solana teams that are affordable and can be trusted
@iris_intel_app - shows who is really behind a wallet or a token, and follows stolen money across chains
Stakeward by @alexandr_zhibul - keeps your staked SOL safe, even if someone steals your wallet key

Privacy:
@VisionSwapSol - a private pool, live on Solana mainnet. Send and trade with no link back to you
@TiraiProtocol - private, quantum-safe transfers between Solana and Ethereum for institutions
Puddle by @staycloakedxyz - makes onchain privacy as easy as a normal crypto transfer
p!pon by @Yu_Ayato - prove facts from your ID card, like “over 20”, without showing your name or birthday
@arcane_finance - privacy and compliance in one stack for company payments, payroll and treasury
@Valiron_grade - identity and reputation for AI agents, so businesses know which agents to trust
@akcanetwork - a VPN for people under censorship.

Developer Infrastructure:
@nori_zk - Solana programs can read Ethereum data with ZK proofs, no oracle or multisig needed
SPIN by @payritHQ - payments without internet. Phones with bank apps in Africa connect over Bluetooth
@CatScope_io - fights MEV centralization on Solana with an open market for validator access
@predictefy - one API for 16+ prediction markets, including Polymarket and Kalshi
@pantahq - build your own prediction market app through one API
@tuwa_io - open-source toolkit for wallet login and tracking transactions on Solana and EVM
@soda_labs_ - any Solana wallet or program can own an address on other chains, with no bridge
Ballista by @jacobdotsol - save complex multi-step Solana transactions as templates you can use again
@raptor_trade - real-time Solana market data, very fast and much cheaper

Honorable Mention:
@bento_guard
@fhenix
@SolanaTestForge
@stardotfun

Which project should be on this list? Tag it below 👇

daily early projects ◼️

@isometricfi — Options that trade like perps: advertised exposure up to ~1,000x, no early liquidation, settlement based on the expiry price. On Arbitrum Sepolia testnet; featured in Arbitrum Autumn.

@swishdotcash — Private USDC/SOL transfers on Solana links, integrating Privacy Cash, MagicBlock and Umbra. Selected for Adevar preaudit support.

@coldstar_sol — Turns a USB device into a Solana offline signer. The project says keys exist only briefly during signing. New website live; Web/iOS release status still unconfirmed.

@treasures_io — Aggregates tokenized-stock quotes across issuers and chains, routing trades from USDC. Recently launched its Signals API for AI agents.

@MentionedMarket — Trade on whether a word gets mentioned during livestreams, podcasts or earnings calls, with USDC settlement on Solana. Selected for Adevar preaudit support.

@bitrepo_xyz — Building around BTC-backed borrowing and credit allocation. Selected for Base Batches 004; Demo Day scheduled for November 18.

@FairHatch — A fair-launch platform on Robinhood Chain, advertising equal-start access, liquidity locking and anti-bot mechanics. Public testnet live.

@staycloakedxyz — One wallet, a fresh address for each payment received, with private transfers through Privacy Pools. Browser extension available on Ethereum, Base and Optimism.

Verify before you ape.

LFGGG 🔥

Just launched the new website!

Web app + iOS released early November

Check it out in our bio now!

We’ve been cooking 👀

For transparency: we sold $COLD after feeling we weren’t receiving the support we expected from EasyA.

Our tokens were locked 2 months ago. We reassessed our position and sold.

The subsequent pump was organic market activity and wasn’t the reason for our sale.

We have just submitted for @colosseum 🔥

Entering the arena with a strong community, amazing traction and a solid team.

Good luck to everyone!

CastleDAO, in their own words 🏰

Two weeks on, we’re looking back at some of the builders who called @cstldao home.

Meet some of the residents ⬇️

CHOOSE YOUR LONDON

Episode 1

'DOOMER'

What’s happening this week:

iOS still in development (yes it is taking some time)

Enterprise packages will be rolling out very shortly

@multisig integration releasing to the dApp

Signing flow will receive a new update to ensure converted USB drives can work across any device

Refund update:

We found out that fees weren’t turned off for some wallets.

Wallets have been charged have been refunded.

Thank you for the patience 🙏

MILESTONE REACHED!

We have hit $750,000 in transaction volume!

To celebrate, we are giving 0% transaction fees and will be turned off for the next week.

Think about it

Privately buy hardware with cash
Privately flash it into a cold signer
Privately store Solana
Privately send Solana
Privately trade Solana

A true complete private workflow

Who else is doing this?

Update on our iOS app:

WE ARE VERY VERY CLOSE!

iOS works a little differently to Android to when interacting with USB drives

We have architected a solution but executing the plan has been quite difficult

As this is an open-source project, are there any devs who can help us?

Coldstar Stats:

$697,943.91 in volume
13,201 wallets created

Only been live for 2 months 🔥

Guys, this may be one of the most exciting demo days taking place in recent times

Got to know a lot of the founders at the castle over the last week and they're all top tier contenders

Tune in!!

x.com/i/broadcasts/1…

My trip from @solana summit serbia to @cstldao was interesting….

No better place to build killer tech

What building at @cstldao feels like