The companies, whose names weren’t disclosed, are not registered with the agency, the Financial Intelligence Unit said.
El secretario de Hacienda, Arturo Herrera Gutiérrez, dijo que las criptomonedas no son activos de curso legal y no son tratadas como divisas dentro del marco regulatorio actual del país.
The statement comes after Mexican billionaire Ricardo Salinas Pliego said his bank would accept bitcoin.
Latin Americans are increasingly turning to stablecoins as a store of value.
Crypto remittances are growing in Latin America, particularly in the wake of other remittance platforms shutting off access to some markets.
Billionaire founder of Grupo Salinas, Ricardo Salinas Pliego, said: "Bitcoin protects the citizen from government expropriation."
Digital transfer agent Vertalo has partnered with real estate platform MountX to tokenize more than 15 digital real estate projects in Mexico and Canada.
Mexo, a cryptocurrency exchange designed for the Latin American user, launched on Thursday.
Two promoters of the crypto Ponzi scheme OneCoin were found dead in Mexico last month.
New laws are strangling crypto startups before they can begin to trade.
Fintech firm Amero-Isatek will offer cash-to-crypto exchanges in eight Mexican states
Medici Land Governance has signed a memorandum of understanding with a local government in Mexico to create a digital land records system.
Peer-to-peer cryptocurrency exchange AirTM has raised $7 million it says it will use to expand in troubled Latin American economies.
A Mexican government announced a blockchain-based project intended to reduce corruption in bidding for government contracts.
Mexico is now just one step away from passing a law that will regulate fintech including cryptocurrencies in the country.