lemon.markets

About lemon.markets

lemon.markets is a German fintech company that provides a Brokerage-as-a-Service platform, enabling other companies to integrate stock market investment features into their own products through a single API. The company was founded in Berlin in 2020 by Marcel Katenhusen and Maximilian Linden, who serves as the CEO. Linden, who founded the company at the age of 19, aimed to create scalable infrastructure for the large capital markets, an area he is passionate about.

The firm’s core offering is a developer-focused API infrastructure that abstracts away regulatory and technical complexities, allowing partners to launch compliant and customer-centric investment products. The platform is designed for a business-to-business model, serving clients such as fintechs, banks, wealth managers, and other technology companies that want to offer investment services. Its services cover the entire investment value chain, including account opening, order management and execution, custody of assets, and tax reporting. The modular, API-first architecture is built to reduce integration time and can be configured to a partner's specific use case, supporting products like savings plans and automated trading strategies.

lemon.markets operates as a BaFin-licensed securities institution, holding licenses for services including contract broking, investment advice, proprietary trading, and custody business, which it obtained in January 2024. The platform facilitates trading in stocks, ETFs, and funds, with plans to introduce fractional trading. The company's technology includes an in-house developed order management system designed for high throughput. Notable clients include Tomorrow, Optio, and Holvi.

The company has secured significant funding to fuel its growth. It raised a €15 million seed round in April 2022, co-led by Lakestar and Lightspeed, and an additional €12 million in July 2024, led by CommerzVentures. In August 2025, Deutsche WertpapierService Bank (dwpbank) announced an agreement to acquire 100% of lemon.markets' shares. The deal, expected to close in Autumn 2025, will see lemon.markets continue to operate as an independent brand and wholly-owned subsidiary, with its existing management team remaining in place.