Twitter could be set to start making money, with plans to roll out commercial accounts later this year.
Co-founder Biz Stone has said the company is in the first phase of introducing the accounts, which will allow business users to pay for services such as detailed analytical data on people visiting their page.
Twitter will make a range of features available that it thinks can help businesses make a profit. These will include the ability to certify accounts (so far only available to a limited number of people).
Stone told Venture Beat, "We have identified a selection of things that businesses say are helping to make them more profit."
After the commercial packages, the company may build business-oriented application programming interfaces (APIs), creating a "commercial layer" over the social network. The commercial APIs will be out later this year.
The announcement came after a number of indicators that Twitter would be going after the business market. It has released a business' guide to using the site, introduced a more professional-looking home page.
Twitter's business model has been the subject of much debate over the last couple of years. Stone also did not rule out the possibility of future acquisitions by the company, which has raised around $55m since it was launched two years ago.