Top California Blockchain Companies (280)
Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, we’re building a resilient economy where everyone can prosper. We support a wide range of digital payments choices, making transactions secure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help...
Block, Inc. is a global technology company with a focus on financial services. Made up of Square, Cash App, Afterpay, TIDAL, Bitkey, and Proto, Block, Inc. builds technology to increase access to the global economy. Each of our brands unlocks different aspects of the economy for more people. Square makes commerce and financial services accessible to sellers. Cash App is the...
Initially built to take the pain out of peer-to-peer payments, Cash App has gone from a simple product with a single purpose to a dynamic app, bringing a better way to send, spend, invest, borrow and save to our millions of monthly active users. With a mission to redefine the world's relationship with money by making it more relatable, instantly...
Bitcoin is the best money. It should be used like it. We build and fund free, open-source projects aimed at making bitcoin the planet’s preferred currency.
Harmony is a fast and scalable blockchain. Harmony recently launched on Binance and shipped Day ONE Mainnet. We are crazily recruiting Rust/Go language enthusiasts, protocol researchers and database hackers. Apply at harmony.one/careers! See https://harmony.one/whitepaper for our latest research and roadmap. Harmony is a fast and secure blockchain with key innovations in state sharding and peer-to-peer networking. Its sharding uses secure proof-of-stake and...
A Web3 social media ecosystem that lets users collaboratively create and monetize digital assets with complete control
Sei Labs builds open sourced technology for the high-performance Sei Blockchain, the fastest Layer 1 blockchain designed to scale with the industry. The unique optimizations built into Sei enable Web3 applications to reach Web2 level scale and performance, driving the mass adoption of digital assets. The Sei Labs team is comprised of former Google, Goldman Sachs, Robinhood, Nvidia, and Databricks veterans...
Gauntlet’s mission is to drive understanding and participation in the financial systems of the future. Building decentralized systems creates new challenges for protocol developers, smart contract developers, and asset holders that are not seen in traditional development and investing. Gauntlet has created a blockchain simulation and testing platform that leverages battle tested techniques from other industries to build financial models...
It’s rare that a new asset class is born. Nevertheless, we’re witnessing exactly that with the rise of crypto. Over just the last few years, since Bitwise was founded, crypto has evolved from an embryonic $50B market to a growing $3T+ juggernaut. At Bitwise, we believe that crypto has reached a turning point, and is headed north of $10T over...
Copper is a digital asset technology company dedicated to helping institutional investors safely acquire, trade and store cryptoassets. Built and led by Dmitry Tokarev, a software and financial engineering specialist, the firm provides a comprehensive suite of custody, trading and settlement solutions that reduce counterparty risk and bring greater capital and operational efficiency to digital asset markets. At the heart...
Hivemapper is a decentralized, ever-updating map built by people, using dashcams, who soon will mine our cryptocurrency, HONEY. This new mapping economy represents a fundamental shift in how maps are built and who owns them, sharing the economic benefits of a global map with those who are building it. Forward looking businesses use our Map API.
Megaphone helps you grow your onchain community's GDP. With Megaphone, you can launch tokens and NFTs, collect form responses, analyze onchain reputation and identity, and incentivize quality community actions. We've processed 68M campaign activity completions, 5.5M form responses, and hundreds of thousands of onchain transactions with iconic brands like Coinbase, Forbes, OneFootball, Pudgy Penguins. Talk to us to learn about the secrets of...
Aptos Labs is a people-first blockchain on a mission to help billions of people achieve universal and fair access to decentralized assets in a safe and scalable way. Founded by some of the original creators and maintainers that researched, designed, and built the Diem blockchain to serve this purpose, we have dedicated several years toward this mission. We believe the open-source...
Gemini is a licensed digital asset exchange and custodian. We built the Gemini platform so customers can buy, sell, and store digital assets (e.g., Bitcoin, Ethereum, and Zcash) in a regulated, secure, and compliant manner.
Subzero Labs is the original contributor behind Rialo, the Real World Blockchain. Our team comprises experienced builders and researchers from leading organizations across blockchain infrastructure and hyper-growth products. Collectively, we have contributed to some of the most foundational projects in the ecosystem. Today, we are focused on designing a next-generation blockchain architecture that transcends incremental innovation.
Braintrust is the first decentralized Web3 talent network that connects skilled, vetted knowledge workers with the world’s leading companies. The community that relies on Braintrust to find work are the same people who own and build it, ensuring the network always serves the needs of its users, instead of a centrally-controlled corporation. And because the community of knowledge workers and...
We are developing Lightning: an open protocol layer that leverages the power of blockchains and smart contracts to make cheap, fast, private transactions available to anyone around the world.
At Tatum, we believe blockchain is the future, and developing apps on the blockchain should be accessible. Tatum is the fastest way to build, test and run blockchain apps. Supported on over 40+ blockchains, we make you turn your ideas into reality easy and quick.
Paystand's on a mission to create a more open financial system, starting with B2B payments. Using blockchain and cloud technology, we pioneered Payments-as-a-Service to digitize and automate the entire cash lifecycle. Our software makes it possible to digitize receivables, automate processing, reduce time-to-cash, eliminate transaction fees, and enable new revenue.
