Changelly has been operating since 2015 and its distribution is unmatched: it powers the swap button in a long list of wallets and services, so millions of users transact with it without ever visiting its site. That distribution, rather than pricing or service quality, is the reason for its scale.
The fee question
Changelly advertises a 0.25% fee. The rate you actually receive typically implies a considerably wider total cost once the spread against market mid is measured, and fixed-rate quotes add a further premium. Any service quoting a headline fee that is much smaller than its realised spread is presenting the number that flatters it, and that is what is happening here.
The complaint pattern
The consistent theme across years of user reports is swaps held pending AML review, followed by requests for identity documents, source-of-funds evidence and in some cases selfies, with slow and templated resolution. Some proportion of these holds are legitimate compliance procedure — every service must run screening. What distinguishes Changelly is the volume of reports and the difficulty users describe in getting funds released or returned.
What it does well
Coverage is broad, fiat routes work, and the integrations mean it is often the path of least resistance inside a wallet you already use. Settlement on unproblematic swaps is quick and reliable.
Who should use Changelly
Ideally, users who have compared its quote against alternatives and specifically need something only it supports. If your wallet defaults to Changelly for swaps, it is usually worth going elsewhere: the same swap through FixedFloat, SideShift or Exolix will typically cost less and carry a lower probability of a hold.