Short answer
JustLend is larger in total value locked, but Sky sees much higher daily fees, suggesting more user activity. Each runs on one chain, JustLend on Tron and Sky on Ethereum.
Size and money locked
JustLend has about $6.6 billion locked in its pools, making it the bigger platform by TVL. Sky’s locked value is around $4.2 billion, roughly two thirds of JustLend’s size. Both platforms show a slight decline over the past week, with JustLend down about 0.2% and Sky down about 18%.
Activity and fees
Daily fees on Sky total about $833 k, far exceeding JustLend’s roughly $85 k. The higher fee revenue points to more borrowing and lending activity on Sky. Both apps report zero 24‑hour volume, so fee data is the primary activity indicator.
Networks and reach
Each platform is limited to a single blockchain. JustLend operates exclusively on Tron, while Sky is built on Ethereum. This means users are confined to the respective ecosystem of each app.
Who each one suits
JustLend is suited for users who prefer the Tron ecosystem and want to access a larger pool of locked assets. Sky appeals to users on Ethereum looking for higher activity and fee‑driven rewards, especially those interested in non‑custodial USDS savings.