Main pick

MEXC
Altcoin-first Sui route
MEXC is the strongest first route when SUI is part of a broader new-coin search and coin breadth matters immediately.
SUI

Searching where to buy Sui? Start with MEXC if you want the broader-access route, Binance if you want the mainstream backup, and Bybit only if workflow matters more than the softest default. This page is built to get you to one SUI route fast before signup.
Quick answer
SUI buyers usually need a choice between broader coin access and mainstream comfort, not another generic exchange roundup.
Coin snapshot
Start here
Pick one default and one backup instead of reopening the full exchange search.
Main pick

Altcoin-first Sui route
MEXC is the strongest first route when SUI is part of a broader new-coin search and coin breadth matters immediately.
Backup

Mainstream backup route
Binance is the right backup when you still want SUI but prefer to benchmark the choice against a larger, more familiar exchange route.
Need one more route?
On this site, MEXC is the altcoin-first route and Binance is the mainstream backup. If you still want a more trading-led route, compare Bybit against MEXC before signing up.
Because SUI intent often overlaps with broader newer-coin intent. An altcoin-first route is usually the most practical first check before you benchmark it against a larger exchange.