At Station F in Paris, a four-year-old fintech is making a specific bet: that the easiest way to get a French saver into Bitcoin is not a trading screen, but a euro account with a French IBAN that quietly skims spare change off every coffee.
That company is Bitstack. In December 2025, it closed a €12.9 million round, roughly $15 million, to expand what it calls Europe's leading Bitcoin savings platform [EU-Startups, Dec 2025]. The round takes total disclosed funding to about $23.9 million across a 2022 seed and the new Series A [Tracxn]. The pitch to users is mechanical and modest: round up daily purchases to the next euro, sweep the difference into Bitcoin, and let dollar-cost averaging do the rest [Bitstack].
The bet
Bitstack sells a consumer app, a debit card that earns Bitcoin rewards on spending, and now a euro account with a French IBAN that lets users receive transfers and convert part or all of their salary into Bitcoin [Tech.eu, Dec 2025]. The product surface is buy, sell, earn, and send Bitcoin, wrapped around the round-up mechanic that gave the company its initial wedge [Bitstack].
The wedge matters. France already has a deep retail crypto base: nearly four million French residents hold Bitcoin, according to the company [Bitstack blog]. Most of them met Bitcoin through an exchange, where the experience is tickers, order books, and tax headaches. Bitstack's argument is that the next several million will not. They will meet it through a savings app that looks like Lydia or Revolut, with a card in the wallet and a salary feed in the back end. Reported user count is more than 200,000 as of mid-2025 [Bitstack blog, June 2025].
Why it could be big
The regulatory timing is unusually favorable. Bitstack holds PSAN registration with the AMF, France's market regulator, and in mid-2025 secured PSCA approval under the EU's MiCA framework as a Crypto-Asset Service Provider [Bitstack blog, June 2025]. MiCA is the first pan-European rulebook for crypto firms, and a clean license is effectively a passport into other EU markets without rebuilding the compliance stack country by country. For a Paris-based consumer app eyeing Western Europe, that is the difference between scaling and stalling.
The investor signal is consistent with that ambition. Bitstack went through Y Combinator's Summer 2022 batch and counts Founders Future among its backers [Tracxn]. The Series A capital is earmarked for product expansion in the savings suite and presumably geographic rollout, given the company's stated goal of becoming Europe's leading Bitcoin savings platform [Bitstack, Dec 2025].
Seed (2022) | 2.2 | $M
Series A (Dec 2025) | 15 | $M
Total disclosed | 23.9 | $M
There is also a structural tailwind that Bitstack does not have to manufacture. Negative real rates on French savings accounts have been a recurring complaint among younger savers, and the Livret A is capped both in rate and in size. A product that frames Bitcoin as a long-duration savings allocation, accumulated in five-euro increments, is pitched at exactly the saver who finds the standard menu inadequate but is not about to open a Binance account. The euro account with French IBAN closes the loop: salary in, round-ups out, Bitcoin accumulating in the background.
The team and traction
Bitstack was founded in 2021 by Alexandre Roubaud, Alexander Roubaud, and Kabir Sethi [Tracxn]. Alexandre Roubaud, the CEO, has been the public face of the company on French business media, including a February 2026 interview on BFMTV's La Grande Interview [BFMTV, Feb 2026] and earlier appearances on Legend and other podcasts walking through the round-up thesis [Apple Podcasts]. The company is registered as Bitstack Digital Assets SAS and operates under a licensed agent arrangement with Xpollens for payment services [Bitstack].
Reported traction: more than 200,000 users as of June 2025 [Bitstack blog, June 2025], a card product live in market [Bitstack], and the new euro account rolling out alongside the Series A [Tech.eu, Dec 2025]. Headcount and revenue are not part of this story, but the product cadence (round-ups, then card, then IBAN, then salary conversion) reads like a company building a neobank one rail at a time, with Bitcoin as the anchor savings asset rather than the hero feature.
The honest counterfactual
The most credible bear case is competitive. Revolut, N26, and other European neobanks already offer in-app crypto purchases to tens of millions of users, and any of them could lean harder into Bitcoin savings as a feature rather than a product. A standalone app has to win on depth: better round-up mechanics, better tax reporting, better card economics, and a clearer identity as a savings vehicle rather than a trading venue. Bitstack's answer, on the evidence, is regulatory specialization and product focus. PSAN plus MiCA approval gives it license coverage that most generalist neobanks treat as a side project [Bitstack blog, June 2025], and the salary-conversion feature is a sharper savings primitive than anything currently surfaced inside Revolut's crypto tab. Whether that is enough to defend the wedge as the category matures is the open question.
The second-order risk is Bitcoin itself. A round-up app that accumulates a volatile asset works beautifully in an up market and tests user patience in a drawdown. Bitstack's framing, that this is long-horizon savings rather than trading, is the right framing for that risk, but it has not yet been tested through a full cycle with 200,000-plus users on the book.
What to watch
The next twelve months are about whether the December 2025 capital translates into measurable expansion outside France. MiCA passporting is the obvious lever, and a launch in a second major EU market, plausibly Spain, Italy, or Germany, would be the cleanest signal that the thesis is scaling. Watch also for headline user growth past the 200,000 mark, take-up of the salary-conversion feature, and any partnership disclosures around the Xpollens agent relationship that would deepen the banking stack.
Bitstack has built something specific: a Bitcoin savings product that looks and behaves like a French bank account. The question for readers is whether that is the shape Bitcoin adoption takes in Europe over the next five years, or whether the neobanks get there first.