An atomic swap trades Bitcoin for Monero directly between two people, with no exchange, no account and no custodian. Either the swap completes and both sides get the other coin, or it's cancelled and everyone keeps what they started with. "Atomic" means it can't half-happen — there's no way for one party to take your coins and vanish.
Why atomic swaps matter
They solve the riskiest part of no-KYC trading: trust. On a centralised exchange you hand over custody and identity. With an atomic swap, the cryptography enforces fairness, so you can convert between Bitcoin's liquidity and Monero's privacy without trusting a third party — and without leaving a KYC trail.
How it works (in plain terms)
Atomic swaps use a clever combination of timelocks and shared secrets. Simplified:
- Both parties lock their coins under conditions tied to a shared cryptographic secret.
- When one side claims their coins, the act of claiming reveals the secret needed for the other side to claim theirs.
- If anyone stalls, timelocks let both parties refund automatically.
Because Bitcoin and Monero have different scripting capabilities, BTC↔XMR swaps use an "adaptor signature" design rather than simple hash-timelock contracts — but the user experience is just: pick an offer, send BTC, receive XMR.
The tools in 2026
The leading desktop tool descends from the COMIT xmr-btc-swap project, now developed by the community as UnstoppableSwap, which rebranded to "eigenwallet." It pairs a swap client with a non-custodial Monero wallet, connecting takers to a network of makers offering liquidity. Always run the latest release and verify downloads.
Trade-offs to know
- Setup: more technical than an instant swap; you run a client and wait for on-chain confirmations on both networks.
- Liquidity and spread: rates depend on available makers; compare before committing.
- Time: settlement spans multiple confirmations, so it's minutes-to-tens-of-minutes, not seconds.
- You need BTC first: atomic swaps convert between coins; pair them with a no-KYC way to get Bitcoin.
When to use a swap aggregator instead
If you want speed and simplicity over maximum trustlessness, a no-KYC instant swap aggregator like Trocador is faster, though it introduces a service in the middle. Atomic swaps are the choice when you want zero custodial risk.
FAQ
What is an atomic swap?
A peer-to-peer trade between two blockchains enforced by cryptography, so it either completes fully or refunds both parties — no custodian, no KYC.
Can you swap Bitcoin for Monero without KYC?
Yes. BTC↔XMR atomic swaps require no account or identity; you only need a Bitcoin and Monero wallet and a swap client.
Are atomic swaps trustless?
Yes — the protocol guarantees you can't lose your coins to a non-cooperative counterparty; worst case, you get a refund via timelock.
Ready to trade? Compare swap options in the NoKYC exchanges directory.