Backers include The Foundry Group and Ignition Partners.
The company, which had raised $1.1m in Series A in 2007 from Ignition Partners and Curious Office, intends to use the funding to grow their web index, hire new team members, add more social and content functionality to its software, and make some acquisitions.
Led by CEO Rand Fishkin, SEOmoz makes software for marketers that focus on inbound channels including SEO, social media, content and community. It helps professionals better understand and address the field of organic search marketing by using software that crawls websites to find errors or missed opportunities, and then makes recommendations based on best practices.
Moz has a current roster of 15,000 paying subscribers and a monthly web count of over 2 million visitors to their very vocal online community.
In conjunction with the funding, co-founder Gillian Muessig will be leaving the board of directors and her active role as President, while Brad Feld from The Foundry Group and Sarah Bird, SEOmoz’s COO, will be joining the board.