The provided URLs do not directly relate to a company named "BLKB" with a URL of http://www.blkb.ch or a LinkedIn page. However, based on the search results, Blackbaud, Inc. (BLKB) is a leading provider of cloud software solutions for nonprofits, foundations, education institutions, and healthcare organizations. They offer fundraising, CRM, financial management, and analytics tools. Their target audience includes organizations in the social good sector. The unique selling proposition is their comprehensive suite of software solutions tailored to the specific needs of these sectors, empowering organizations to increase their impact.