Web Commenting Platform Disqus Raises $10 Million

Disqus, a startup that operates a commenting platform for 750,000 Web sites, including this one, has raised a $10 million funding round led by North Bridge and Union Square Ventures. The start-up, hatched at Y Combinator in 2007, had previously raised $4.5 million from USV and others. It faces competition from Facebook, which just launched its own commenting system; Twitter may also offer a competitive product.