Chainlink

UMA's optimistic oracle allows smart contracts to quickly receive any kind of data for different applications, including insurance, financial derivatives, and prediction markets.

The Pyth network is a first-party financial oracle network designed to publish continuous real-world data onchain in a tamper-resistant, decentralized, and self-sustainable environment.

API3 DAO is delivering first-party oracle solutions that deliver greater source transparency, security and scalability in a decentralized solution for smart contracts.

Band Protocol is a cross-chain data oracle platform that aggregates and connects real-world data and APIs to smart contracts.

Witnet is a permissionless, decentralized, and censorship-resistant oracle helping smart contracts to react to real world events with strong crypto-economic guarantees.

Chronicle overcomes the current limitations of transferring data onchain by developing truly scalable, cost-efficient, decentralized, and verifiable oracles.