Chainlink $LINK and #API3 are both oracle networks that bring real world data on-chain. The key difference is who delivers the data and how it gets there (how the data reaches smart contracts). Chainlink works like Uber Eats or FedEx. They use a large network of independent node operators. Those operators pull data from providers, compare results off-chain (Off-chain reporting protocol), and then submit one agreed report on-chain. It is battle tested and integrated almost everywhere across DeFi and beyond. API3 flips this model. Instead of relying on middlemen couriers (3rd party), it is more like the restaurant delivering the food directly (1st party). Data providers run Airnodes, which are plug-and-play oracles they control, and they publish their data on-chain themselves (directly). This creates fewer moving parts and more transparency. And cuts out intermediary markup. API3 also introduces OEV, which stands for Oracle Extractable Value. Every time an oracle updates a price there is a chance for traders to profit by reacting first. Normally outsiders exploit that profit. API3’s OEV network redirects most of it back to the protocol itself, with up to 90 percent redistributed to the applications that use the feeds. Chainlink is larger and has more reach. API3 is leaner and focused on first party delivery. Data comes straight from the source and sends most of the proceeds back to the protocols themselves. Both solve the same problem, but they approach it with different philosophies.