Ethereum ZK-Rollup Developer StarkWare Raises $50M at $2B Valuation

ZK-Rollup developer StarkWare has raised $50 million in a Series C funding round that values the firm at $2 billion. The company plans to launch StarkNet Alpha on Ethereum mainnet by the end of November.

StarkWare Increases Valuation

Just weeks before StarkNet Alpha’s mainnet launch, investors are doubling down.

The ZK-Rollup developer announced the end of its Series C funding round Tuesday after raising $50 million from several existing investors. Sequoia Capital led the round, with investment funds Paradigm, Three Arrows Capital, Alameda Research, and Founders Fund also participating.

StarkWare uses ZK-Rollups to scale Ethereum. ZK-Rollups bundle transactions off-chain and create ZK-SNARKs, which get submitted to the base chain. They allow for faster transactions with significantly reduced gas fees. Rollup technology currently comes in two flavors—ZK and Optimistic. Optimistic Rollups such as Arbitrum and Optimism rely on trust between parties, resulting in a challenge period where anyone can dispute the legitimacy of a transaction. This means it can take up to a week for users to transfer funds back to Ethereum mainnet. However, ZK-Rollups submit proofs to the mainnet continuously, allowing users to transfer funds back instantly.

Currently, StarkWare has integrated StarkEx, its ZK-Rollup scaling engine, into several crypto projects such as the decentralized exchange dYdX and the fantasy soccer NFT platform Sorare. However, with the launch of StarkNet Alpha planned later this month, developers will be able to independently launch smart contracts on the network, opening up the scaling technology to whoever wants to build on it.

As gas fees and congestion on Ethereum show no signs of decreasing, competition for effective scaling solutions is heating up. In September, Enya and OMG Network launched an Optimistic Rollup solution called Boba Network, aiming to reduce the challenge period time and streamline withdrawals.

Earlier today, meanwhile, Layer 2 Polygon unveiled its own ZK-Rollup called Miden, developed under Polygon’s $1 billion fund allocated to ZK-based projects. Miden will compete with existing ZK-Rollups such as zkSync, Loopring, and StarkWare’s upcoming StarkNet to provide scaling solutions for Ethereum dApps.

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