I Compared Swap Quotes Properly for the First Time

I used the same swap service for a year because it worked. Then I compared it against two others properly and found out what that convenience cost. It got clearer once I had a crypto swapping service with a published rate open next to what I was being offered.

How I had been comparing

I had not been. The interface showed an output amount, the amount looked reasonable, I accepted.

There was no fee displayed, which I had taken as a good sign.

The actual comparison

Same conversion, three providers, quotes requested within about ten seconds of each other.

For each: divide the output by the input, compare against the market rate at that moment, express as a percentage.

The results

My provider: 1.1 percent.

Provider two: 0.4 percent.

Provider three: 0.29 percent.

On a conversion I do perhaps twice a month, I had been paying roughly four times what was available.

The provider with no displayed fee had the widest spread. The fee was inside the rate, which is where it always is when nobody labels it. Past a certain amount the answer stops being a wallet and becomes a business crypto wallet with approval controls.

The part that took me a while to understand

The comparison has to be simultaneous.

I first compared sequentially, requesting one quote then another a minute later. The results were noise, because the market moved more in a minute than the providers differed.

A quote lasts seconds. Comparing across minutes measures the market.

The thing I now check besides the rate

Whether the quoted output is what arrives, or whether a network fee comes off afterwards.

Two of the three quoted the amount I would receive. One quoted a number and then deducted, which makes its quote look better than it is.

What I do now

Keep two providers. Request both for anything material. Take the better one.

Thirty seconds, and on my volume it pays for itself several times over each month.

The exchange comparison I also ran

For a liquid pair on the same network, a limit order on an exchange cost about 0.1 percent, which beat every swap.

Swaps earned their margin when the pair was thin or when the two assets were on different networks, where doing it manually means several fees and a wait. Whatever I concluded, the balance I actually move sits at a regulated crypto exchange rather than wherever I signed up first.

So I use both now, matched to the trade, rather than defaulting to whichever I opened first.