It tells you when not to trade
Every route panel carries a verdict, and most of the time that verdict argues against the swap. Venue gaps here run roughly 0.1% to 0.7% while route friction runs 0.3% to 0.6%, so the gap is usually smaller than the cost of capturing it. A tool paid by volume has no reason to tell you that. It is the first thing this one says.
The same share, priced three ways
SPY on BNB Chain, on Solana and on Robinhood Chain are the same underlying share at three different prices, and an aggregator cannot see that because they are three unrelated tokens to it. PlumS reads all three against the real US market price in one row, so the question stops being "what does this token cost" and becomes "where is this share cheapest right now".
Executable prices, not flattering ones
A pool price is what the last trade happened to print. Robinhood Chain is read instead as an executable quote of one token into USDG across V4, V3, V2 and UniswapX, which is what a trade would actually get. The two disagree by about a third of a percent, and on a page about fractions of a percent that difference is the whole point.
A broken price is refused, not displayed
On permissionless chains a near-empty pool will happily quote a stock at millions a share, and a symbol search returns those pools next to the real ones. Any venue more than 40% away from the real price is marked thin, dropped from every ranking, and never offered as a destination. Every address tracked here was resolved by contract address on an issuer-independent index, then matched to a pool quoted in a canonical stablecoin.
The fee only applies when you came out ahead
PlumS takes 0.2% of a swap, and only when the cheaper venue still wins after that 0.2% is counted. Otherwise it takes nothing. The fee is also inside the cost column rather than added behind it: the panel re-quotes with the fee, so the number you read is the number you pay.
Your funds never touch it
PlumS finds and ranks. LI.FI routes and executes. The wallet connects to the widget, not to this site, and PlumS never takes custody at any point. Reading the page connects nothing at all.
The name
PlumS carries its capital S because the S is for Stock. Everything here is one share, priced in several places at once.