Which 10 companies are at the forefront of blockchain technology and its applications in various sectors?

1. IBM: IBM has been a leader in blockchain technology, offering services and solutions for various sectors, including finance, supply chain, healthcare, and government.

2. Microsoft: Microsoft provides Azure Blockchain service, enabling businesses to build, deploy, and manage blockchain applications. They also promote interoperability through initiatives like the InterWork Alliance.

3. Ethereum: Ethereum is a decentralized blockchain platform that allows the development of smart contracts and decentralized applications (dApps). It is one of the most prominent platforms for blockchain innovation.

4. ConsenSys: ConsenSys is a prominent blockchain software company focusing on building decentralized applications, infrastructure, and solutions on the Ethereum platform.

5. Ripple: Ripple uses blockchain technology to provide fast, low-cost international payment solutions for financial institutions. They enable efficient cross-border transactions with their native digital asset, XRP.

6. Binance: Binance is one of the largest cryptocurrency exchanges globally and is expanding its presence in various blockchain-related sectors, including decentralized finance (DeFi) and initial coin offerings (ICOs).

7. Coinbase: Coinbase is a popular cryptocurrency exchange that allows individuals to buy, sell, and store cryptocurrencies. They also offer services like custodial storage and institutional-grade trading for digital assets.

8. Chainlink: Chainlink is a decentralized oracle network that connects smart contracts with real-world data and APIs, enabling secure and reliable interactions between blockchain and external systems.

9. Tezos: Tezos is a blockchain platform that focuses on security, formal verification, and self-amendment. It allows developers to create decentralized applications and smart contracts with a formal governance model.

10. VeChain: VeChain implements blockchain technology for supply chain management and product authentication. It allows businesses to track and verify the authenticity and quality of products throughout the supply chain.

Note: The blockchain landscape is dynamic, and the forefront companies may change over time due to the rapid evolution of this technology.