Ratings · Measured, not sponsored
Instant crypto exchangers
All of them advertise 0% commission. We asked four of them for a quote on the same pair, at the same second, and compared it to what the market was actually paying. The commission is genuinely zero. The price is between one and two percent.
The short answer
The best instant crypto exchange in our ranking is ChangeNOW, because its quotes sat closest to the real market rate on average, about 1.07% below mid-market across the pairs and sizes we tested on 14 July 2026. Exolix was cheaper on a small stablecoin swap, and Godex was the most expensive at about 1.89%. Every one of these services advertises zero commission, so the spread inside the quoted rate is the actual price. The trade-off to know before you send anything is that "no account" does not mean "no verification": your coins sit with the service during the swap, and it can pause the swap and ask for documents.
The verdict
measured July 14, 2026
About 1.07% below mid-market across every pair and size we measured — and the only one that states its quote is all-in.
Just 0.51% on a $500 USDT→BTC swap. Also the bluntest AML terms in the category — read them before you send.
Godex’s API returns fee: "0" and its page says "Lowest Fees" — yet it quoted the widest spread we measured, about 1.89% below market. Everywhere here, the fee page is not the price.
What we did
We asked every service that answers without an API key for a quote on the same pairs, at the same amounts, inside the same two-second window — and compared what each would actually hand you against the mid-market rate from a live order book. Nothing was executed. A quote is free, which is exactly why nobody funded by referrals ever runs this.
The ranking
3 rated
Click a row for the quick read, or open a company for its per-criterion scores and full profile.
Our raw measurements
Mid-market taken from a live order book at the same moment, not from a spot index — an index lags, and it would smear exactly the basis points we are trying to see. Benchmark at the time of measurement: BTC $64,440, ETH $1,874. Every request in a row was fired concurrently; a row is thrown away if the responses land more than 2.5 seconds apart, because four requests sent in sequence are not a comparison of four services, they are a comparison of four moments.
| PAIR | SIZE | SERVICE | YOU RECEIVE | MID-MARKET WOULD GIVE | COST TO YOU |
|---|---|---|---|---|---|
| BTC → ETH | 0.05 | ChangeNOW | 1.699056 | 1.719750 | −1.20% |
| BTC → ETH | 0.05 | Exolix | 1.694226 | 1.719750 | −1.48% |
| BTC → ETH | 0.05 | Godex | 1.680022 | 1.719750 | −2.31% |
| BTC → ETH | 0.05 | Alfacash* | 1.704036 | 1.719750 | −0.91% |
| BTC → ETH | 1 | ChangeNOW | 33.985431 | 34.395001 | −1.19% |
| BTC → ETH | 1 | Exolix | 33.987747 | 34.395001 | −1.18% |
| BTC → ETH | 1 | Godex | 33.630378 | 34.395001 | −2.22% |
| BTC → ETH | 1 | Alfacash* | 34.081544 | 34.395001 | −0.91% |
| USDT → BTC | 500 | ChangeNOW | 0.007692 | 0.007754 | −0.80% |
| USDT → BTC | 500 | Exolix | 0.007715 | 0.007754 | −0.51% |
| USDT → BTC | 500 | Godex | 0.007612 | 0.007754 | −1.83% |
| USDT → BTC | 10000 | ChangeNOW | 0.153401 | 0.155081 | −1.08% |
| USDT → BTC | 10000 | Exolix | 0.152781 | 0.155081 | −1.48% |
| USDT → BTC | 10000 | Godex | 0.153238 | 0.155081 | −1.19% |
* Alfacash returns a gross rate with no network fee deducted and ignores the amount asked about. Its figure is an upper bound on what you would receive, not an estimate of it, and it is therefore not ranked. Publishing it as the best rate would have been the exact trick this page exists to expose.
The seven we could not measure — and why
Seven services could not be measured. Three of them (SimpleSwap, StealthEX, LetsExchange) simply need a free partner key and will be added on the next run. Two (Changelly, ChangeHero) block scripted requests at the network edge and additionally require cryptographically signed requests — meaning nobody can independently price them without their cooperation. One (FixedFloat) requires a signed key, and is notable for publishing a real fee (0.5% floating, 1% fixed) instead of claiming zero. And one (Quickex) has no public rate endpoint at all: every API path returns "Forbidden", its API subdomain does not resolve, and neither its documentation nor its own GitHub publishes one.
- Changelly — Cloudflare blocks any scripted request with HTTP 403 before it reaches the API, and the API additionally requires RSA request signing with a partner key.
- ChangeHero — Cloudflare 403 before the API is reached; also requires an HMAC-signed partner key.
- FixedFloat — Requires an API key plus an HMAC-SHA256 signature over the request body. Notably, it is one of the few that PUBLISHES a real fee (0.5% floating / 1% fixed) rather than claiming zero.
- SimpleSwap — Quote endpoint requires a free partner key; the request is otherwise valid.
- StealthEX — Quote endpoint requires a free partner key.
- LetsExchange — Quote endpoint requires a free bearer token.
- Quickex — No public rate endpoint exists: every API path returns a bare "Forbidden", the API subdomain does not resolve, and neither the docs nor the GitHub repo publish one.
Guide
Understanding instant exchangers
What an instant crypto exchanger is and how a swap works
An instant exchanger converts one coin into another without an account: you request a quote, send coin A to a deposit address the service gives you, and it sends coin B to an address you choose. There is no order book on your side and no balance to manage.
Behind the screen the service is doing several transfers. ChangeNOW's own fee FAQ lists four separate costs that can sit inside one swap: the network fee for your deposit, a network fee to move coins to its liquidity provider, that provider's trading fee, and the network fee for sending the result to you. It says all of them are folded into the estimate.
For the minutes or hours between your deposit and the payout, the service holds your coins. That window is why our method gives 25% of the score to freeze risk and AML honesty, more than any criterion except the rate itself.
Where the cost hides: the rate, not the fee
The cost of an instant swap is the gap between the amount you receive and what the same amount would buy at the mid-market rate at that moment. We measured that gap directly by asking each service for a quote on the same pair and size within the same short window.
Averaged across BTC to ETH and USDT to BTC at two sizes each, ChangeNOW came to about 1.07%, Exolix about 1.17% and Godex about 1.89%. The spread was not fixed by size: Godex's worst figure, 2.31%, came on the small BTC swap, and its best, 1.19%, on the $10,000 stablecoin swap.
Whether the quote is fixed or floating changes the comparison. ChangeNOW describes its floating rate as the best available at the moment of the trade, so you may receive more or less than estimated. A fixed rate locks the amount, but only within a limited deposit window, and the reserve that pays for the lock is built into the rate. Compare floating quotes with floating quotes and fixed with fixed.
Are no-KYC crypto exchanges really no-KYC?
Most instant exchangers do not ask for identity documents to start a swap, but their own AML policies allow them to ask once your coins have arrived. That is the gap between how these services are searched for and how they actually work.
ChangeNOW's published policy is a typical example. It says verification may be requested after fraud or stolen-fund reports, at the request of a fiat partner, or for transactions that look unusual, and that automated monitoring can pause a transaction while documents are reviewed. If a verification link expires after three days, the case is reviewed individually. The policy does not say what happens to the funds if you refuse.
This is why the rating asks whether a service tells you before you send what triggers a hold, what clears it, and whether a size threshold is published. ChangeNOW, the leader on rate, publishes no amount below which a hold cannot happen, so there is no swap size that is safe from a review.
How to choose the best crypto swap service
Choose on the measured rate first and the written freeze terms second. Our weighted criteria map to specific risks:
- Real rate vs mid-market (45%): protects you from a zero-fee claim that hides a 2% spread.
- Freeze risk and AML honesty (25%): protects you from discovering the verification rules only after the service already holds your coins.
- KYC thresholds and limits (15%): tells you the size at which documents become likely, if the service publishes it.
- Coins and networks (10%): counts pairs that actually returned a quote in our run, not the number on the homepage.
- Rate-type honesty (5%): checks that a floating quote is not presented as a guarantee.
Alfacash appears in our table but is not ranked, because its endpoint returned a gross rate with no network fee and ignored the amount requested. A quote that leaves out costs the others include cannot be compared with them, however good it looks.
Cheaper ways to swap crypto, and when an exchanger still makes sense
If both coins live on a chain you can already reach, an on-chain swap is usually cheaper than any instant exchanger we measured. A decentralized exchange or aggregator shows the route and lets you set the slippage, and you sign from your own wallet, so nothing sits with a third party. Our decentralized exchange rating and the guide to the cheapest way to swap crypto compare those routes.
An instant exchanger makes more sense when the two coins sit on different chains, you do not want an exchange account, and the swap is small enough that a 1% to 2% spread is a price you accept for convenience. In that case, quote the same pair on two or three services at the same moment and compare the amount you receive.
Before you choose
7 checks- Request quotes for your exact pair and amount from at least two services within the same minute, and compare the amount you would receive.
- Work out the gap against mid-market yourself: divide the quoted output by what the same input buys on a deep exchange order book.
- Confirm whether the quote is fixed or floating, and how long a fixed rate stays valid after you are given the deposit address.
- Read the service's AML/KYC page before sending, and note what triggers a hold and whether an amount threshold is published.
- Send from a wallet you control, and enter a refund address if the service offers one, so a cancelled swap has somewhere to go.
- Save the transaction ID and the exchange ID from the confirmation page until the payout has arrived.
- Check whether the same swap can be done on-chain through a DEX aggregator before paying a 1% to 2% spread.
Terms on this page
7 terms- Mid-market rate
- The midpoint between the best bid and best ask on a live order book. It is the fair reference price before any spread or fee.
- Spread (exchanger)
- How far a quoted rate sits below mid-market, expressed as a percentage. For zero-commission services, it is the main cost.
- Floating rate
- A quote that settles at whatever the rate is when your deposit is processed, so the final amount can differ from the estimate.
- Fixed rate
- A quote that guarantees the amount you receive if you deposit within a set window. The cost of that guarantee is built into the rate.
- Post-deposit KYC
- A request for identity or source-of-funds documents made after the service already holds your coins, often as a condition of releasing them.
- Gross rate
- A quoted rate before network fees are deducted. It overstates what you will receive and cannot be compared with all-in quotes.
- Network fee
- The fee paid to the blockchain to move coins. A swap can involve several, which an all-in quote should include.
How we scored this
weights sum to 100Every service in this category advertises “0% commission”. None of them is free. They are paid out of the gap between the rate they quote you and the rate the market is actually trading at — so we asked all of them for a quote on the same pair, at the same moment, and compared each one to mid-market. That single table is the whole category.
Real rate vs mid-market45%
Measured by us. We request a quote for the identical pair and identical amount from every service inside the same short window, and compare the output amount to the mid-market rate at that timestamp. The gap is the true price, expressed as a percentage — regardless of what the fee page says. Quotes only; nothing is executed, so this measurement is free and repeatable, which is exactly why we can run it monthly and nobody else does.
Freeze risk and AML honesty25%
This category’s real danger is not the spread — it is sending coins to a no-account service that then demands identity documents before it will release them. We read the published AML policy: does it state, BEFORE you send, what triggers a hold, what is required to clear it, and what happens to your money if you refuse? A service that only discovers its KYC obligations after it has custody of your coins is marked down hard.
KYC thresholds and limits15%
At what amount verification is demanded, and whether that threshold is published in advance.
Coins and networks10%
Pairs that actually return a quote when asked — taken from our own measurement run, not from the marketing claim of “900+ coins”.
Rate-type honesty5%
Fixed and floating rates are both legitimate. Presenting a floating rate as though it were a guarantee is not. We check what the quote actually commits to.
Disqualifies a company outright
- — A pattern of funds frozen after receipt with retroactive KYC demands.
- — No published AML policy on a service that takes custody of your coins mid-swap.
Weights sum to 100. A criterion we cannot verify is deleted, not guessed. Full methodology →
Is there a free alternative?
If both coins are on a chain you can already reach, you do not need any of these.
The cheapest swap we measured cost about 1% of the trade. A direct trade on a deep exchange order book — or an on-chain swap through an aggregator where the routing is visible and the slippage is yours to set — will normally cost you a fraction of that. What you are really buying from an instant exchanger is the ability to swap without an account, and that convenience is priced at roughly one to two percent. Sometimes that is a fair trade. It is never a free one, and the entire category is marketed as though it were.
What changed since last time
2 entries- 2026-07-14Category rebuilt from scratch on measured quotes.The previous version of this page scored these services on a soft rubric with no measurement behind it. It has been replaced entirely.
- 2026-07-14Godex re-measured on a floating rate rather than its default fixed rate.A fixed rate legitimately costs more. Our first run compared its fixed quote to everyone else's floating quote, which overstated its markup by roughly 0.2 points. Corrected before publication.
Questions
8 questionsIf the commission is 0%, how do these services make money?
On the spread. They quote you a rate that is worse than the rate the market is actually trading at, and they keep the difference. The commission really is zero — the fee line in Godex's own API response literally reads "0" — and it is also irrelevant, because the price is buried in the exchange rate rather than added on top of it. We measured that gap directly: it ran from about 0.5% to about 2.3%, depending on the service, the pair and the size.
Which instant exchanger is actually cheapest?
Of the four that would answer us without an API key, ChangeNOW was the most consistent at roughly 1.07% below mid-market on average, and Exolix was the cheapest on the stablecoin pair we tested — down to 0.51% on a $500 USDT to BTC swap. Godex was the most expensive by a wide margin at around 1.89%, which is notable mainly because Godex is the one whose page title says "Lowest Fees".
These services say "no KYC". Is that true?
Not in the way it is heard. You are not asked for identity documents to open an account, because there is no account. You can be asked for them after you have already sent your coins. Exolix states in writing that it may "suspend, delay, reject or cancel transactions" at its sole discretion and "without any prior notice", and then require a government ID, a liveness selfie, proof of address and documents showing your source of wealth. Godex advertises "No KYC" in its page title while operating a written Customer Identification Program. The pattern across this whole category is the same: you are not asked for ID to get in. You are asked for ID to get your money back.
Why are some services missing from the ranking?
Because we could not measure them, and we would rather publish the closed door than pretend it is not there. Three simply need a free partner key and will be added next run. Two — Changelly and ChangeHero — block scripted requests at the network edge and also require cryptographically signed requests, which means no independent party can price them without their cooperation. One has no working public rate endpoint at all. Every one of them is listed below with the reason.
Is a fixed rate worse than a floating rate?
No — it is a different product, and a legitimately more expensive one, because you are buying certainty about what you will receive. This mattered to our own numbers: Godex's endpoint returns a fixed rate by default, and our first measurement compared its fixed quote to everyone else's floating quote, which overstated its markup by about 0.2 percentage points. We re-ran the whole thing asking Godex for a floating rate. It is still last, and now the comparison is fair.
Do larger swaps get a better rate on instant exchangers?
Not reliably. In our measurement, Exolix's spread rose from about 0.51% on a $500 USDT to BTC swap to about 1.48% at $10,000, while Godex's fell from about 1.83% to about 1.19% on the same pair. Larger swaps can also be more likely to trigger a compliance review. Quote your actual amount rather than assuming size earns a discount.
What happens if my coins arrive after a fixed-rate quote expires?
The fixed rate generally no longer applies. ChangeNOW states that its fixed rate is guaranteed only within a limited deposit window, and what happens to a late deposit is set by each service's own terms rather than by the quote. Read those terms before sending, and send early enough that network congestion cannot push your deposit past the window.
Is an instant exchanger the same as a DEX aggregator?
No. An instant exchanger receives your coins, swaps them through its own liquidity partners and sends the result, so it holds your funds during the swap. A DEX aggregator routes a transaction you sign from your own wallet through on-chain pools, and you can see the route and set slippage. The aggregator is usually cheaper, but it works only on chains your wallet can reach.
Sources for the guide
2 sourcesHow this is funded
It is not. There are no affiliate links on this page or anywhere on this site, no paid placements and no sponsored positions. Nobody in this table can buy a place in it or influence a score. The full policy →