Bitstack has secured a $15 million Series A round that positions the French Bitcoin savings platform for broader European expansion and product growth. The round was led by 13books Capital, with participation from existing backers AG2R LA MONDIALE, Plug and Play Ventures, Serena, Stillmark and Y Combinator. The company, founded in 2021 and already a leading Bitcoin savings app in France, is now accelerating its continental ambitions after receiving MiCA authorization from the AMF in June 2025.
The Paris-based startup has grown rapidly since launching its app in 2022. Bitstack now counts more than 300,000 active users who have collectively saved more than €300 million in Bitcoin. The company has made Bitcoin accumulation accessible for retail users by rounding up everyday purchases to the nearest euro and converting the difference into Bitcoin. With euro area inflation having eroded purchasing power by more than 23 percent from October 2020 to 2025, according to the ECB, the company believes Bitcoin’s capped supply and growing adoption are driving interest in long-term digital savings.
With the funding, Bitstack is accelerating international deployment. The app is now live in a dozen European markets, including Germany, Spain, the Netherlands, and Italy, supported by localized languages and unified regulatory compliance under MiCA. The new funding also helps the company introduce a broader suite of financial services for French users, including a euro account with a French IBAN and a newly announced VISA debit card.
The card, launching in beta on January 13, 2026, for the first 5,000 people on the waitlist, offers two core incentives tied to saving behavior. First, purchases made with the card are rounded up in real time, with the difference automatically saved in Bitcoin. Second, the card introduces a rewards feature Bitstack calls “stackback,” giving users up to 1 percent back in Bitcoin with no spending cap. The company says this is the first VISA debit card in Europe to reward long-term savings in Bitcoin.
To support rising demand and its expansion efforts, Bitstack plans to hire about twenty new employees across compliance, engineering, marketing, and customer support in 2026. With this Series A, the company says it is preparing to reinforce its position as Europe’s most prominent Bitcoin savings platform as it scales its euro banking features, card progra,m and wider distribution across the continent.
KEY QUOTES
“In three years, Bitstack has achieved exceptional growth: more than 300,000 active users have saved over €300 million in Bitcoin, and our revenue has increased tenfold in two years. These results demonstrate the growing interest of the French population in Bitcoin, in a context of economic uncertainty and monetary tensions. We are now the most widely used French crypto app.”
Alexandre Roubaud, Co-founder & CEO at Bitstack
“Our investment in Bitstack reflects AG2R LA MONDIALE’s conviction that digital assets, particularly Bitcoin, must be integrated into long-term savings strategies. Bitstack now represents a trusted partner to whom we can direct clients seeking to diversify their savings into crypto-assets, and Bitcoin in particular.”
Yannick Lassalle, Director of ALM Innovation at AG2R LA MONDIALE
“With this fundraising round, Bitstack enters a new dimension. By expanding its geographic footprint and enhancing its product suite, including a VISA debit card with stackback and a euro account with a French IBAN, Bitstack is now ideally positioned to cement its status as Europe’s leader in Bitcoin savings.”
Michael McFadgen, Co-Founder and Partner at 13books Capital
