
Rootstock is a Bitcoin sidechain adding Ethereum-compatible smart contracts to Bitcoin. It uses merged mining for security, allowing Bitcoin miners to mine Rootstock simultaneously. Founded in 2017, it aims to broaden Bitcoin's use cases and support DeFi using Bitcoin-backed assets.

Mezo is a decentralized platform creating 'Bitcoin’s Economic Layer' to unlock new financial opportunities for Bitcoin holders. Integrating with tBTC, Mezo allows users to engage in DeFi without losing BTC exposure, providing innovative financial products and real-world applications while ensuring security and asset ownership.

Babylon Labs integrates Bitcoin into the PoS ecosystem, utilizing idle BTC to enhance PoS network security. With recent staking limits increased, around 23,892 BTC ($1.49 billion) has been staked.

Solv Protocol is creating a вecentralized Bitcoin кeserve to leverage Bitcoin’s $1 trillion asset base. By solving BTC fragmentation across chains, Solv enhances liquidity, offers yield opportunities, and ensures secure, compliant custody, positioning itself as a leader in BTCFi, bridging traditional finance and crypto.

Pell Network is building an Omnichain Trust Network by utilizing BTC Restaking and Liquid Staking Derivatives (LSD) to enhance cryptoeconomic security for decentralized validated services (DVS). The platform allows users to reapply their idle BTC to secure services across multiple blockchain ecosystems while offering stakers passive income opportunities.