Acquia Inc., which offers products and services to help customers build websites using an open-source publishing platform called Drupal, said it has completed a $30 million ­financing round, bringing total investment in the Burlington company to $68.5 million.

Led by a new investor, Investor Growth Capital, the round includes Goldman Sachs and Accolade Partners, as well as all of Acquia’s current investors, North Bridge Venture Partners, Sigma Partners, and Tenaya Capital, Acquia­ said in a news release.