The word “online broker” today covers two realities that have little in common. On one side, accredited intermediaries who hold your securities account or your PEA under the supervision of th
The word “online broker” today covers two realities that have little in common. On one side, accredited intermediaries who hold your securities account or your PEA under the supervision of the ACPR and the AMF. On the other, global multi-asset platforms that mix cryptocurrencies, tokenized stocks, and futures contracts on a single account, often outside any European framework. Confusing them is the costliest mistake an investor can make in 2026. This guide sets the criteria, then honestly positions each family, including MEXC.
Let’s start with the framework, because everything else follows from it. An online broker, in the French regulatory sense, is an investment service provider. It must obtain approval from the Prudential Control and Resolution Authority, issued on the conforming advice of the AMF, and be listed in the Regafi register maintained by the Bank of France. The AMF explains how to check this accreditation in a few clicks: this is the first thing to do before opening an account, and many savers ignore this.
This status is not a formality. It triggers three mechanisms that platform marketing rarely mentions precisely. The first is segregation of assets: your securities are not on the broker’s balance sheet and generally survive its failure. The second is the guarantee of securities by the Deposit Guarantee and Resolution Fund, which compensates up to 70,000 euros per client and per institution if securities go missing; cash is covered by deposit guarantees up to 100,000 euros when the account holder is a bank. The third is less visible but weighs each year: the unique tax form, which pre-fills your income tax return. Without it, you must reconstruct capital gains, dividends and withholding taxes yourself, and declare the existence of an offshore account.
One point many confuse deserves to be stated clearly: none of these protections cover a market decline. They protect the holding of your assets, never their value. An accredited broker can perfectly make you lose money; they cannot, in principle, make your securities disappear.
A comparison of serious online brokers does not stop at the fees displayed on the homepage. Five criteria structure the decision, in an order that is not the one of brochures.
Criterion What to check concretely Regulation and guarantees ACPR/AMF approval and registration in Regafi (or European passport); segregation of assets; FGDR guarantee. For crypto: registration in the ESMA CASP register. Product range European stocks and ETFs, PEA, bonds, or conversely crypto-assets, tokenized US stocks, futures contracts. The same platform rarely covers both worlds. Actual fees Commission per order, account maintenance fees, currency exchange fees on foreign securities, crypto/fiat conversion fees, carrying costs on derivatives. Taxation Unique tax form provided or not; obligation to declare an offshore account; treatment of capital gains according to the asset. Accessibility Real eligibility from your country of residence, verified on the official site; market opening hours; quality of support.Regarding fees, a simple rule avoids many disappointments: calculate the total cost on your real volume and frequency, not on an example. A “0%” commission combined with 1% currency exchange fees on each US stock costs more, over a year, than a moderate commission without ancillary fees. This is true for both a classic broker and a crypto platform.
The first family consists of brokers accredited in France or in the European Union, often backed by a banking group or investment firm. They provide access to listed stocks and ETFs, the PEA and its advantageous taxation after five years, bonds and sometimes regulated derivatives. Their strength lies in one word: the framework. Accreditation, guarantees, tax form, MiFID II suitability test. Their limit is just as clear: access to crypto-assets is either non-existent or limited to a few indirect products, and markets close in the evening and on weekends.
The PEA deserves attention, because it is the argument only this family can offer. Capped at 150,000 euros in contributions (225,000 euros when combined with a PEA-PME), it exempts income tax on gains made after five years of holding; only social levies remain due, at 18.6% since January 1, 2026. For a long-term saver invested in European stocks, this advantage often outweighs any commission difference over ten years. No crypto platform, no matter how comprehensive, can offer it: the PEA is reserved for authorized institutions.
The second family was born from crypto and has distanced itself from it. Global platforms now offer, on a single account, thousands of crypto-assets, US stocks as tokenized shares, futures contracts on stocks and commodities, copy trading, sometimes a payment card. They operate continuously, fractionalize everything, and their fees on active trading are often lower. In return, most are not PSIs accredited in France: no PEA, no FGDR guarantee, no unique tax form, and eligibility that depends on the country of residence. To identify the serious actors in this family, our comparison of the most reliable exchanges in 2026 provides references.
The trap would be to look for which of these two families is “the best.” The question makes no sense. A saver who wants to place ETFs in a PEA and sleep peacefully does not have the same need as an active investor who wants exposure to gold, US tech, and bitcoin from a single interface. The first needs an accredited broker. The second looks at a multi-asset platform, knowingly. Some combine both.
MEXC clearly belongs to the second family and is one of its most complete examples. The platform claims more than 40 million users and offers on a single account more than 3,000 crypto-assets, access to US stocks and ETFs via its RealStocks offer (more than 7,000 securities, with actual ownership of the securities and eligibility for dividends according to the platform), tokenized stocks, futures contracts on stocks and commodities, and copy trading features. It publishes a monthly proof of reserves audited by Hacken. For a profile wanting to go from bitcoin to Nvidia then to gold without changing apps, the argument is real. Our comprehensive review of MEXC details fees, security and limits.
A technical clarification is necessary because it causes confusion. “Buying Nvidia” does not mean the same thing depending on the platform. With an accredited broker, you hold the share registered on a securities account, with voting rights and the end-of-year tax form. A tokenized share is a token backed by that share, issued by a third party, which replicates its price and sometimes the dividend without making you the direct shareholder. MEXC’s RealStocks offer presents itself as a level above, with securities held by accredited broker-dealers and dividend eligibility announced by the platform; it remains that it is not a French securities account, with all that implies in terms of guarantees and reporting. Three products, three levels of protection, one word on the window: this is precisely where a comparison must be precise.
It must now be as clear what MEXC is not. MEXC is not an online broker in the sense of French regulation: the platform is not listed in Regafi, is not a PSI accredited by the ACPR, and offers neither PEA, FGDR guarantee, nor unique tax form. On the crypto side, it also does not appear in the ESMA CASP register and has restricted its services in the European Union following the MiCA deadline of July 1, 2026. Practically, a French resident must check directly on the official site that the targeted services are accessible to them, and under what conditions, before any registration or deposit. Presenting MEXC as a substitute for an accredited broker would be false; presenting it as a powerful multi-asset platform to be used knowingly of its status is accurate.
To explore MEXC’s multi-asset offer and check your eligibility from your country, open an account here. Check the accessibility of the targeted services before any deposit.
To go further on a specific asset class, our guide to investing in gold in 2026 shows how the same asset varies depending on the chosen platform, from bullion to token.
What 2026 has made obvious is that the word “broker” alone no longer says anything. Between an accredited PSI holding a PEA and a platform listing 3,000 crypto-assets and tokenized stocks, the vocabulary is common, the framework is not. The only reflex that really protects is two checks, free and public: Regafi for a broker, ESMA’s CASP register for a crypto platform. Everything else, fees, range, ergonomics, is then compared properly. Before, it’s a matter of status; after, it’s a matter of need.
