Adrien Barthel is a co-founder of Sleek. Before it, he spent six years in e-commerce, including as chief marketing officer of Luxola, which LVMH acquired in 2015.
He and Julien Labruyere founded Sleek in Singapore in 2017. Before launching, they posed as clients at traditional accounting firms. They found margins of about 40% and poor customer satisfaction, and built a digital service for company incorporation and accounting.
Sleek raised a Series A of $14 million, later extended to $25 million, and expanded to Hong Kong, the UK and Australia. In June 2025 it raised a $23 million Series B. It serves more than 16,000 small businesses a year.
Investors include White Star Capital, Jungle Ventures, EDBI, Ellerston Capital, Money Forward and SEEDS Capital. Sleek is privately held.