Here we report on the progress of the leading builders in the zkBitcoin ecosystem, documenting recent significant releases, technical breakthroughs and general updates 👇

StarkWare/Starknet
@Starknet has officially reached Stage 1 as a fully decentralized zkRollup, strengthening its security and integrity:
They also announced plans to introduce Bitcoin staking by Q3 2025. The update aims to offer Bitcoin holders sustainable rewards while enhancing Starknet’s security. It also provides developers with additional tools at a low cost:
@StarkWareLtd presented new research on ColliderVM ( a new protocol that enables stateful computation on Bitcoin without relying on fraud proofs, allowing developers to build trust-minimized bridges to L2 networks like Starknet.
Using hash collision puzzles, it improves capital efficiency and simplifies user interactions. While still early and computationally demanding, it eliminates collateral requirements and external watchers, introducing a promising direction for Bitcoin scalability:
There have also been details shared of several new partnerships, including:
• @atomiqlabs: enabling trustless Bitcoin-to-wBTC swaps on Starknet with zero slippage and minimal risk. In partnership with @myBraavos wallet, this integration simplifies Bitcoin access to Starknet DeFi, including fee-free bridging and yield opportunities:
• @garden_finance: launching a direct BTC bridge to Starknet with fast execution, low fees, and support for multiple assets. Users can easily move Bitcoin and other tokens from major chains to Starknet in a single click:
• @Lombard_Finance: integrating LBTC, a liquid-staked Bitcoin asset, into Starknet. This unlocks Bitcoin liquidity for lending, trading, and DeFi participation, advancing Starknet’s vision of unifying Bitcoin and @ethereum on a single execution layer:

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