Unlike other web-based directories and search engines, The Opt-Index business directory gathers all its information directly from individual businesses and organizations who list voluntarily (opt-in). The company believes that this approach will yield a highly organized index and provide accurate searches within locales and across its 10,000-plus categories. All listing submissions are processed exclusively through the company's website to its real-time database. Changes are reflected immediately on-line. The service is open to all legitimate businesses and nonprofit organizations -- regardless of whether they have websites. There is no charge to users to list or search the site.