| Total | $29.9M |
| Series A, 1/08 Scott Banister | $900k |
| Series B, 12/08 BlueRun Ventures Ignition Partners Founders Fund Scott Banister | $11M |
| Debt, 3/09 Western Technology Investment | $3M |
| Series C, 3/11 BlueRun Ventures Western Technology Investment Ignition Partners Founders Fund Scott Banister | $15M |
Topsy, which launched on May 26, 2009, is a real-time search engine, with a focus on social media sites like Twitter. The site’s underlying technology examines popular links as well as the influence of each person citing a link. Topsy augments traditional search engines by finding information that people are talking about.