Top San Diego, CA Web3 Startups (517)

Our technology makes it easy for companies—from fast-growing startups to global fintechs—to integrate stablecoins into their products, platforms, and payment flows. Whether they’re launching a credit card program, enabling cross-border payments, or embedding wallets, Rain builds the tools to do it fast, flexibly, and compliantly. We’re built for the next generation of global finance. Our infrastructure combines the stability of trusted...

Alchemy powers the top blockchain companies globally and has been featured in TechCrunch, Forbes, Bloomberg, and elsewhere. Our mission is to bring web3 to a billion people, by providing builders with the tools they need to build exceptional onchain products. Alchemy is the only complete developer platform that offers the powerful APIs, SDKs, and tools necessary to build and scale onchain...

Hiro is a company that creates developer tools for Stacks, a network that enables apps and smart contracts for Bitcoin. As a core entity within the Stacks Ecosystem, Hiro works alongside various independent entities, developers, and community members to establish a user-owned internet on Bitcoin. Hiro provides developers with the tools to innovate and build on Bitcoin in ways previously...

Bitnomial is building the next generation of U.S. derivatives infrastructure. We are a regulated exchange and clearinghouse offering bitcoin futures and options under full oversight of the CFTC. By combining the transparency and safeguards of traditional finance with the efficiency of digital assets, Bitnomial brings institutional trust and accessibility to crypto-native markets. We operate as a Designated Contract Market (DCM), Derivatives...

Brightech is a Ukrainian-American IT company providing a full range of software development services for the corporate segment, mobile platforms and WEB

We are the global leader in new token issuance, helping blue chip projects like Filecoin, Solana, Celo, Algorand, Dapper, and others connect with hundreds of thousands of new token holders. And we also support the full lifecycle of crypto investment, from token sales through token distribution, trading, lending, and crypto-specific services such as staking and access to decentralized-finance opportunities. Our team...

Hexens is a cybersecurity company that strives to elevate the standards of security in Web 3.0, create a safer environment for users, and ensure mass Web 3.0 adoption. Hexens has multiple top-notch auditing teams specialized in different fields of information security, showing extreme performance in the most challenging and technically complex tasks, including but not limited to: Infrastructure Audits, Zero Knowledge...

We provide end to end customized solutions for web and mobile app development to clients around the globe. We support our clients with tools and techniques and innovative approaches to solving mission-critical business problems. Our mission is to revolutionise the process involved in solving the strategic or routine IT problems that affect the business growth. Our process is streamlined towards...

Designed for the metaverse and the play-to-earn era, MODA is dedicated to the adoption of Web3 in the music industry via NFTs, micro-licensing, DAO governance and DeFi.

The pioneers in mobile and sensor based behavioral biometrics. Zighra’s SensifyID is the world’s first patented on-device AI-powered continuous authentication solution available today. In a world increasingly reliant on sensor-based devices, SensifyID is powered by ultra fast-AI with N-dimensional behavioral biometric algorithms for next generation user interfaces, while applicable for today’s devices. Its non-intrusive, seamless authentication architecture, where the user...

Nogle is shaping the foundation of fintech and web3. We engineer solutions to empower people and businesses in today’s economy by driving innovation with our leading-edge technology. Our digital financial ecosystem is efficient, secure, and widely accessible, providing an array of solutions ranging from payment gateways and investment products to lending services and exchanges

Our mission is to empower people worldwide to do more with their money by converting idle capital into working realtime streams. Superfluid protocol enables you to pay (and get paid) every second, instead of monthly. By accelerating money, we empower people worldwide to do more with less capital, increasing people's independence and overall happiness.

GoPlus is working as the "security infrastructure" for Web3 by providing open, permissionless, user-driven security services. We are building a security data infrastructure and security service platform, creating a safer Web3 ecosystem. Currently, GoPlus has developed a real-time, dynamic, and automated security detecting platform, including token detection, NFT detection, malicious address detection, approval security APIs, and dApp contract security, with...

Automate Web3 dApp production-grade testing with team staging envs, Mainnet state, Chainlink, Gelato Automation, DevTool support, privacy, and unlocked faucets.

MoogleLabs is a leading AI/ML development company specializing in cutting-edge technologies like Artificial Intelligence, Machine Learning, Blockchain, DevOps, Data Science, and emerging solutions such as Low Code/No Code platforms, AI Testing, and Agentic AI. Our mission is to “decode innovation” by delivering smart, scalable, and efficient solutions that empower businesses across various industries worldwide. Backed by a team of seasoned experts,...

Innosoft is an offshore software development company that serves clients from all across the world. We develop innovative and efficient web and software development solutions for small companies to large corporations. Our web development company is known for translating user experience into unique brand recognition.

The AI Data Layer For Web3 AI Applications 0xScope is the backbone of Web3 AI, helping companies in the intersection of Web3 and AI to develop innovative solutions, powered by its proprietary, first-of-its-kind Web3 AI Data Layer. The 0xScope Web3 AI Data Layer features an established and complete set of standards for collecting, cleaning, and managing relevant on- and off-chain...

Based in San Francisco, Azumo is a top-rated nearshore software development company. Customers work with us to scale their software development efforts and build high quality web, mobile, data and cloud applications. At Azumo, we build intelligent applications. We are passionate about technology to solve complex problems for our customers around the globe. From our proprietary AI-based solutions like, HealthyScreen.ai, Baneka...

Cyfrin brings world-class smart contract security audits, tools, and education to hundreds of thousands of users, partners, and blockchain protocols. Home to some of the best smart contract security researchers in the market— professionals at Cyfrin come from backgrounds like Chainlink, Alchemy, Aragon, WorldCoin, Microsoft, and Google. We help secure some of the top protocols and organizations in DeFi, combining top...

Polymer is on a mission to build IBC infrastructure. We're working on securing cross chain communication across ecosystems. Come join us and build an open and permissionless web3 future!