Ia your project open source? Can people audit the source code?
Atomic swaps are really something we need, but there is none so far.
Changelly shapeshift etc are just exchanges where someone or some script swap coins for you. A true atomic swap should be done using smartcontracts, open and auditable, without any central authority who could interfere in the transaction.
Yes, the contracts are currently open sourced and soon enough the whole client side will be also open source (so you will be able to verify and audit the code). But yes, we are using smart contracts and in terms of BTC we are using P2WSH.