Unilever did not disclose the price paid for the California-based company, but both Bloomberg News and Fortune magazine reported it was around USD 1 billion (910 million euros), or about five times its projected revenue this year.
Founded in 2012, Dollar Shave Club has quickly "grown into a full male grooming business that has transformed the shaving category with its lifestyle brand empowering 3.2 million members", said Unilever in a statement.
Multi-blade models can be had for under USD 10 including shipping and the company now offers a range of men's personal care products.
Dollar Shave Club will give Unilever a boost in the men's razor market.
Although active in more than 190 countries with a stable of household brands, including Lipton tea and Knorr soups, Unilever has few in the men's personal care segment.
"We plan to leverage the global strength of Unilever to support Dollar Shave Club in achieving its full potential in terms of offering and reach," said Kees Kruythoff, president of Unilever North America.
Unilever will have a long way to go before challenging the global dominance of Proctor & Gamble and its Gillette brand in the men's razor segment, however.
According to Euromonitor International data, Proctor & Gamble held 56 per cent of the nearly USD 15 billion global men's shaving market last year, compared to 0.9 per cent for Dollar Shave Club and 0.5 per cent for Unilever.
Unilever said that Michael Dubin, the founder and chief executive of the Dollar Shave Club, would stay in his post.
"DSC couldn't be happier to have the world's most innovative and progressive consumer-product company in our corner," Dubin was quoted as saying in the Unilever statement.
