At present, Compound has only ever used Chainlink as an oracle provider. In the past, OpenZeppelin has done evaluations to consider other providers like Redstone to ensure their compatibility with the protocol. We would urge that an evaluation be done for API3 as well but only once it has received significant support from the community to move forward. I would also ask @Gauntlet to assess the claims made by API3 regarding profitability and the impact on timeliness of liquidations, following up on their earlier concerns shared on OEV.
While OpenZeppelin remains neutral on the selection of vendors to the DAO, I do have concerns with deploying API3 as a provider on a live Comet market without further due diligence. API3’s current adoption is fairly small compared to other oracle providers and does not have any significant usage on chains where Compound V3 is active. Simply put, API3 does not yet have a track record of supporting a major DeFi protocol such as Compound and the community should carefully weigh the risks of being the first major adopter, especially given how much the protocol’s health relies on up-to-date price feeds and liquidations.