New York, August 6, 2025 – Fiamma Labs, the Bitcoin infrastructure company building permissionless and trust-minimized rails for digital finance, today announced the mainnet launch of its flagship product: the Fiamma Bridge, the first publicly accessible, multi-chain BitVM2-based bridge that lets Bitcoin holders safely move BTC into DeFi across major ecosystems, including Ethereum, Aptos, Arbitrum, Sei, BNB Chain, Base, Polygon, ZKSync, CoreDAO, Unichain, and Plume. For the first time, users can now access yield, borrow against, and make payments across multiple blockchains without trusting custodians or centralized companies with their Bitcoin.

When users deposit BTC, the Fiamma Bridge mints FiaBTC, a tokenized version of Bitcoin that maintains 1:1 value while being usable in DeFi apps. This launch marks the beginning of Fiamma’s vision to securely integrate Bitcoin into everyday finance, turning Bitcoin from a store of value to a productive asset that generates returns while remaining under the owner’s control. Unlike traditionally wrapped BTC solutions that rely on offchain custodians, Fiamma leverages BitVM2 to keep Bitcoin secure through zero-knowledge proofs and covenant-based Taproot addresses, pre-signed transaction logic, and onchain dispute resolution mechanisms that brings Bitcoin-native programmability to life through fraud-proof execution. FiaBTC is backed by Fiamma’s trust-minimized system and can always be redeemed for real Bitcoin.

“Bitcoin has always been for everyone, but until now, using it meant trusting centralized parties to access financial services. With the Fiamma Bridge, we've unlocked Bitcoin's full potential to earn yield and access DeFi through a truly decentralized system, marking a breakthrough in overcoming its programmability limits. The future of finance is here.” – Yovela Luo, Co-founder of Fiamma

At its core, the system employs a challenge–response mechanism where users, operators, and bridge committees collectively secure BTC. Any invalid withdrawal can be contested directly on the Bitcoin Layer 1, and the presence of a single honest challenger is enough to ensure system integrity - a much safer model than traditional paradigms that rely on a single company or small group. Fiamma’s permissionless, low-barrier challenger model allows unlimited participants to verify transactions, maximizing trustlessness and security.

“We’ve long awaited a universal, trust-minimized BTC wrapper for our ecosystem. The Fiamma bridge helps bring fresh liquidity and users, unlocking the trust-minimized Bitcoin access developers and users have been waiting for.” –Ryan De Souza, APAC Partnership Lead at Offchain Labs.

To make the bridge scalable and secure, Fiamma’s team unlocked proprietary innovations to solve three technical challenges: built compact verification systems that fit within Bitcoin’s transaction requirements, created isolated security to protect each user's individual assets, and enabled users to deposit and withdraw any amount without compromising security.

Beyond bridging, Fiamma will enable anyone - not just institutions - to put their Bitcoin to work through onchain, MicroStrategy-style accumulation strategies. Using Fiamma’s vault infrastructure and native DeFi integrations, users will be able to create automated Bitcoin treasury strategies that compound returns while maintaining non-custodial control.

The Fiamma Bridge is already integrated into Fiamma One, the company’s forthcoming self-custodial superapp. Designed for a one-click experience, Fiamma One abstracts the complexity of bridging and DeFi into a simple interface, allowing users to earn yield through investment strategies, borrow against BTC, spend directly from their yield positions, dollar-cost average into BTC regularly, and earn high returns on stablecoins safely.

Fiamma’s infrastructure has been tested across multiple chains, including Ethereum, Aptos, Arbitrum, BNB Chain, ZKSync, Monad, and Solana, attracting over 239,000 testnet users and 5.5 million transactions, demonstrating both technical resilience and clear user demand.

“We’re proud to support Fiamma in bringing Bitcoin to Aptos with a trust-minimized, decentralized bridge and laser focus on product and go-to-market execution. By simplifying the user experience, Fiamma is unlocking BTCfi for the mainstream and accelerating both liquidity and activity across the Aptos ecosystem.” – Ash Pampati, Head of Ecosystem at Aptos Foundation
"Fiamma's launch marks a real inflection point for Bitcoin utility. They've unlocked a path for BTC to function as productive, self-custodied collateral across modern DeFi ecosystems. This aligns deeply with our vision at Core Ventures to activate and scale Bitcoin. Fiamma's infrastructure proves that Bitcoin doesn't need to compromise to participate in programmable finance, and that's a solid breakthrough." – Brendon Sedo, Initial Contributor at Core DAO & Core Ventures

The company raised an oversubscribed $4.3 million seed round last year, led by Lightspeed Faction and L2 Iterative Ventures with participation from Babylon and BoB. The team includes core founding engineers of the BitVM Alliance, ex-Binance Labs investor & ex-Citi investment banker, and seasoned zero-knowledge cryptographers.

With Fiamma Bridge live, Fiamma One launching soon, and additional chains and DeFi integrations planned, Fiamma is transforming Bitcoin into the backbone of the onchain economy and making Bitcoin usable in modern finance without sacrificing security or decentralization.

About Fiamma Labs

Fiamma Labs builds permissionless Bitcoin infrastructure for everyone. Backed by leading investors and built by domain experts in zero-knowledge proofs, Bitcoin systems, and both decentralized and traditional finance, Fiamma launched the first public, multi-chain, trust-minimized Bitcoin bridge. More efforts are underway to realize our vision of democratizing Bitcoin, including the upcoming launch of Fiamma One, a superapp designed to make Bitcoin and stablecoin utilization effortless, and supporting Bitcoin-focused strategy vaults.

For more information, visit https://fiammalabs.io or follow @Fiamma_Labs on X.

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