| Website | 51.com |
| Category | Consumer Web |
| Phone | 86-21-58815151 |
| Employees | |
| Founded | 2005 |
| Description | Chinese social network provider |
| TOTAL | $67M |
| FUNDING TOTAL | $67M |
| Venture Round, 5/06 Susquehanna International Group Sequoia Capital | $6M |
| Series B, 5/07 Intel Capital Sequoia Capital Redpoint Ventures SIG | $10M |
| Series C, 7/08 Giant Interactive Group Susquehanna International Group Sequoia Capital Redpoint Ventures Intel Capital | $51M |
51.com (hereinafter referred to 51), established in August 2005, is the largest social network service provider in China. 51 is committed to offer its users stable services to store their personal data such as photo and blogs, and to provide facilities to let them easily communicate to each other.