More than 50 million users in the United States each month.
Craigslist, offering free classified advertisements online, has been around since 1996 (it began life as a mailing list in 1995). In other words, it’s a real web veteran, and it’s probably quite a surprise to most to see that they have so few employees. And note that the number of users we mentioned here is just for the United States. Craigslist is also available in other countries.
Simply amazing from a small office in SF that 30 employees are handing the transactions of 50million users each month. source