Transparency
How we collect exchange rates
Cambiaca is a free, independent comparison site. This page explains where our prices come from, how often they are refreshed and how we pick the best rate.
Where the data comes from
Cambiaca reads the rates each exchange house publishes on its own website or official channel. We do not estimate or alter prices: we show the buy and sell price exactly as each house publishes it, along with the branch and city. We currently track 12 exchange houses in 16 cities and 25 currencies.
How often rates are refreshed
Our system checks every source every 10 minutes. Each house decides when it changes its board: the time we show is when we checked, not when the house last changed its price. When a house publishes the time of its last change and that was more than 48 hours ago, we mark the quote as outdated. The last full check ran on 13/11/2026 04:40.
How we pick the best rate
For each currency and city we show two best prices: the best buy (the house that pays you the most guaraníes for your currency) and the best sell (the house that charges you the fewest guaraníes for that currency). They are often different houses, so we list them separately.
Quality control
If a house publishes prices more than 20% away from the median of the other houses in the same city, we treat it as a publishing error and exclude it from best-price and trend calculations, although the quote stays visible in the list. With fewer than three houses in a city we skip this filter, because the median is not representative. We also never use as the best price a quote the house hasn't changed in more than 48 hours, according to the date the house itself publishes.
Regulation
In Paraguay, exchange houses must be licensed by the Central Bank of Paraguay (BCP), which publishes the list of authorized entities. Rates are not set by the government: each house freely sets its buy and sell prices.
Important notice
Cambiaca's rates are for reference. The final price is set by the exchange house at the counter and may vary with the amount, time of day or payment method. Cambiaca is not an exchange house, does not carry out transactions and is not regulated by the BCP. Always confirm the price with the house before you trade.
Found an error?
If you see a rate that does not match the exchange house's, email us at [email protected] and we will check it.