How do a DEX, an instant swap service, and a centralized exchange differ?

A DEX like Uniswap executes against onchain liquidity. Your assets stay in your wallet until settlement. A connected wallet is required. An instant swap service like Changelly or ChangeHero generates a deposit address. It routes your order to third-party liquidity. It pays out to an address you supply. No account, no wallet connection. A centralized exchange like Kraken or Binance takes custody. You verify your identity, deposit, trade a ledger balance, and withdraw separately. The dividing line is custody, not price.

Which crypto swap exchange has the lowest fees?

It depends on the pair and the size. Binance has the cheapest order book: 0.10% at entry, 0.023% taker at VIP 9. Jupiter charges 0% on stable-to-stable routes. Uniswap charges 0% at the app level. Its v3 pool tiers run 0.01% to 1%. Changelly publishes 0.25% on floating swaps. ChangeHero publishes 0.5% flat. Kraken's Convert costs 1% plus a spread. Depth beats a low fee on most pairs. Judge the quoted output.

Do any of these require KYC?

Kraken and Binance require identity verification before you can trade or withdraw. The other six need no registration to swap. Changelly and ChangeHero both run automated risk screening. A flagged transaction is held until verification completes. Uniswap, 1inch, and Jupiter screen wallet addresses against sanctions lists on their interfaces.

What is the safest way to swap crypto?

Safest depends on the risk you fear most. A self-custody protocol removes counterparty risk and adds smart contract risk. THORChain's May 2026 exploit shows that risk is not theoretical. A regulated exchange like Kraken adds a licensed counterparty and published reserves. An instant swap service keeps the transit short and needs no account. Whatever you pick, check the transaction on a block explorer before calling it done.

What infrastructure does a swap feature need?

A hosted quote API is enough for a basic integration. That changes once you compute routes, simulate transactions, or watch the mempool. Those workloads are RPC-bound. Shared public endpoints rate-limit them early. That is the point where managed node infrastructure stops being optional.