Groupon was founded in 2008 and has since grown rapidly, reaching over $1 billion in revenue after only 16 months. It now operates in over 500 markets across 44 countries. Groupon's business model involves partnering with local businesses to offer daily deals and coupons, with both the business and Groupon receiving half of the revenue from each deal. While Groupon has seen great success, concerns exist around whether businesses can retain customers acquired through deals and if demand will remain high enough for Groupon to continue expanding. Competition in the daily deals space is also intense, with LivingSocial being Groupon's main competitor. The future of Groupon and daily deal sites remains uncertain.