RockSolid, a startup focused on institutional-grade liquidity vaults, has raised $2.8 million in a Pre-Seed funding round led by Castle Island Ventures. Other participants include Blockchain Builders Fund, GSR, Kindred Ventures, Rocket Pool, and the Stanford Blockchain Accelerator. The funds will support the expansion of RockSolid's technical, operations, and marketing teams. The company has also launched its first official rETH vault, integrated into Rocket Pool's front-end. This white-label, single-click vault offers holders access to customized DeFi strategies. Nic Carter of Castle Island Ventures highlighted the solution's potential to lower entry barriers for institutional and community participation in DeFi. Rocket Pool, the third-largest decentralized staking protocol, currently holds over $2.7 billion in locked value.