| Website | clearspring.com |
| Blog | clearspring.com/b... |
| @clearspring | |
| Category | Advertising |
| Phone | 703-677-3999 |
| Employees | 85 |
| Founded | 1/04 |
| Description | content sharing, audience targeting |
| Total | $58M |
| Series A, 5/06 Novak Biddle Venture Partners ZG Ventures | $2.5M |
| Unattributed, 11/06 Novak Biddle Venture Partners | $2M |
| Series B, 2/07 Novak Biddle Venture Partners ZG Ventures Mark Jung Steve Case Ted Leonsis | $5.5M |
| Series B, 7/07 | $10M |
| Series C, 5/08 New Enterprise Associates Novak Biddle Venture Partners | $18M |
| Series D, 5/11 Institutional Venture Partners New Enterprise Associates Novak Biddle Venture Partners Ted Leonsis Steve Case Nigel Morris Ron Conway | $20M |
Clearspring is the largest online content sharing platform on the web. Clearspring’s AddThis reaches over 1B unique users monthly WW, and is used by over 8MM unique publisher domains. Clearspring’s Audience Platform enables brand advertisers to reach these social audiences via interest-based advertising.