Slingshot is a San Francisco-based crypto trading app that lets people buy, sell, and swap hundreds of thousands of tokens across multiple blockchains from a single USDC balance - hiding the usual friction of wallets, bridges, and gas fees behind a clean consumer interface. Founded in 2020 by Coinbase alum Clinton Bembry, it raised roughly $18M through a Ribbit Capital-led Series A and was acquired by NFT marketplace Magic Eden in April 2025.
Halliday is a San Francisco blockchain infrastructure company building the Agentic Workflow Protocol, a system that lets developers create onchain financial applications without writing smart contracts. Its flagship product, Halliday Payments, gives developers a single interface for fiat onramps, cross-chain bridging, swaps, and offramps. Backed by a16z crypto across both its seed and Series A rounds, Halliday has raised $26 million total and works with teams including DeFi Kingdoms, Avalanche, ApeCoin, Story Protocol, and Metis.
Bankole Omodunbi is the co-founder, CEO and CTO of Verbwire, a Web3 infrastructure startup that turns weeks of Solidity, Hardhat and wallet configuration into a single REST API call. A former Managing Director in equities quant trading at Credit Suisse with 16+ years on Wall Street, he left banking in 2021 to build developer tooling that lets engineers deploy smart contracts, mint NFTs, move assets cross-chain and spin up wallets using familiar languages like Python and Java. Verbwire raised a $12.3M Series A and is based in the New York area.

Griffin Dunaif is the co-founder and CEO of Halliday, a San Francisco blockchain startup building the first agentic workflow protocol - infrastructure that lets developers ship onchain applications without writing smart contracts. A Stanford computer science graduate (2023) who left to build, Dunaif started Halliday in 2022 as a buy-now-pay-later tool for gamers, then pivoted to the broader bet that workflows, not contracts, are how AI agents will safely operate onchain. The company has raised $26 million total, including a $20 million Series A led by a16z crypto in March 2025.
Verbwire was a Web3 infrastructure company that collapsed the entire smart-contract stack into a single REST API. Founded by two former Wall Street quants, it let developers in any language - Python, Java, JavaScript, C++ - deploy contracts, mint NFTs, manage wallets, store files on IPFS and query on-chain data without ever touching Solidity or Hardhat. With 60+ endpoints across 10+ EVM blockchains, it served tens of thousands of developers and processed millions of API calls before the founders wound it down, noting that AI had begun to close the very complexity gap they were built to bridge.
0x is the open exchange infrastructure powering token swaps for many of crypto's largest apps - Coinbase, Robinhood, Phantom, MetaMask, Matcha and more. Through its Swap API, gasless transactions, and the underlying 0x Protocol, the company aggregates liquidity from hundreds of sources across the major chains so developers can ship trading experiences without building order routing themselves.