A mere day after Salesforce announced that it was acquiring social media monitoring company Radian6 for $326 million in cash and stock, rival Visible Technologies this morning announced that it has secured an extra $6 million in financing.

The round was led by the company’s previous backers, which include Investor Growth Capital, Centurion Holdings, Ignition Partners, In-Q-Tel and WPP. Visible Technologies has raised a total of $45 million in funding to date.

Visible Technologies aims to provide its clients with a 360-degree view of social media chatter, and helps companies turn this data into actionable marketing and business strategies.

Visible Technologies CEO Kelly Pennock yesterday penned a blog post on Salesforce’s purchase of Radian6, positing that it shows social media monitoring is going mainstream and that the acquisition – for a ‘great premium’ – validates the space.

Social media monitoring startup Visible Technologies has raised a whopping $22 million in Series C funding from Investor Growth Capital with Centurion Holdings, Ignition Partners, In-Q-Tel and WPP participating in the round. This round brings the startup’s total funding to $34 million.

Visible Technologies is using the funding to invest in further product development and engineering and will also look to expand to international markets. Founded in 2003, Visible Technologies offers companies and brands a suite of products that allow users to monitor their brand on social media applications and websites, such as Facebook and Twitter, manage reputations and engage with consumers around conversations regarding a brand.

Visible Technologies has several systems for tracking conversation on the web, including TruPulse and TruReputation. TruReputation tracks your corporate reputation by looking at search engine, social media and blog results related to your company and employees and analyzing whether the references are positive or negative. TruPulse is targeted at helping companies “track, analyze and participate” in the conversations taking place across the web. The TruPulse system crawls the web for conversations on Twitter, Facebook, YouTube, blogs, forums and other sites related to a company. The system then analyzes each topic by subject and sentiment, and allows users to track this information over time using dynamic charts and statistical reports to identify influencers, hot spots, and trends. Users can then engage with consumers from the TruVoice platform by Tweeting or posting to other social media sites.

Visible Technologies is also incorporating their platform with the everyday CRM software that companies use, such as those offered by Salesforce.com or Oracle. The startup has accumulated an impressive roster of clients that use its software including Microsoft, Xerox, Autodesk, and Hormel. Visible Technologies faces competition from Radian6, Scout Labs and ViralHeat.

Visible Technologies is a company that helps corporations manage their online reputations by becoming more aware of and responsive to these conversations. Visible Technologies was started in 2003 and took a Series A investment of undisclosed size from U.K.-based advertising giant WPP in July 2006. WPP announced it acquired 25% of the issued share capital of Visible Technologies LLC for $3.5 million with the option to buy 26% in August of that year. Today they’re announcing a $12 million series B led by Ignition Partners with WPP also participating.

Visible Technologies makes two systems for tracking conversation on the web, TruCast and TruView. TruView tracks your corporate reputation by looking at search engine results related to your company and analyzing whether the references are positive or negative.

Their TruCast system is targeted at helping companies “track, analyze and participate” in the conversations taking place across the web. The TruCast system crawls the web for conversations on blogs and forums related to a company. The system then analyzes each topic by subject and sentiment, and allows users to track this information over time using dynamic charts and statistical reports to identify influencers, hot spots, and trends. Conversations found by the system can also be passed on to a PR representative for a response, which hopefully won’t turn into PR trolling.

BuzzLogic is another company helping corporations manage online reputations, but focuses on finding the top influencers around a topic, not every conversation about your company.