The grades of 4 Internet Software & Services stocks are on the rise this week on Portfolio Grader. Each of these stocks is rated an “A” (“strong buy”) or “B” overall (“buy”).

Qihoo 360 Technology Co., Ltd. ADR Class A (QIHU) is seeing ratings go up from a B last week to a A this week. Qihoo 360 Technology Co., Ltd. ADR Class A provides Internet and mobile security products in the People’s Republic of China. The company also gets A’s in sales growth, earnings growth, and return on equity. For more information, get Portfolio Grader’s complete analysis of QIHU stock.

DHI Group, Inc. (DHX) earns a B this week, jumping up from last week’s grade of C. DHI Group, Inc. provides specialized career Websites and career fairs for professional communities. The company also gets A’s in operating margin growth and free cash flow. For more information, get Portfolio Grader’s complete analysis of DHX stock.

Angie’s List, Inc.’s (ANGI) ratings are looking better this week, moving up to a A from last week’s B. Angie’s List, Inc. engages in collections of consumer reviews on local service providers ranging from home improvement to healthcare. For more information, get Portfolio Grader’s complete analysis of ANGI stock.

This week, Spark Networks, Inc.’s (LOV) ratings are up from a C last week to a B. Spark Networks, Inc. is a provider of online personals services in the United States and internationally. The company also gets A’s in earnings surprise and return on equity. For more information, get Portfolio Grader’s complete analysis of LOV stock.

Louis Navellier’s proprietary Portfolio Grader stock ranking system assesses roughly 5,000 companies every week based on a number of fundamental and quantitative measures. Stocks are given a letter grade based on their results — with A being “strong buy,” and F being “strong sell.” Explore the tool here.