Chainlink (LINK) is the leading oracle provider, and the project has onboarded over 281 crypto projects in 2021. Some of these include heavyweights like Huobi's ECO Chain, the Hedera Governing Council, and Alchemix.
Launched in Oct. 2020, Chainlink's verifiable randomness function, or VRF, has also gained notoriety among decentralized applications (dApps). VRF provides an automated source of randomness to ensure prizes and rewards are issued in a verifiably fair fashion.