This week, 4 Internet Software & Services stocks are improving their overall ratings on Portfolio Grader. Each of these stocks is rated an “A” (“strong buy”) or “B” overall (“buy”).

Facebook, Inc. Class A (FB) shows solid improvement this week. The company’s rating rises from a B to a A. Facebook, Inc. Class A is a social networking service and website. The company also gets A’s in sales growth. For more information, get Portfolio Grader’s complete analysis of FB stock.

This is a strong week for Angie’s List, Inc. (ANGI). The company’s rating climbs to B from the previous week’s C. Angie’s List, Inc. engages in collections of consumer reviews on local service providers ranging from home improvement to healthcare. The company also gets A’s in earnings revisions. For more information, get Portfolio Grader’s complete analysis of ANGI stock.

eGain Corporation (EGAN) improves from a C to a B rating this week. EGain Corporation provides customer service infrastructure solutions for companies involved in electronic commerce. For more information, get Portfolio Grader’s complete analysis of EGAN stock.

This week, Inuvo, Inc.’s (INUV) ratings are up from a B last week to a A. Inuvo, Inc. offers online and traditional advertising, marketing, and communications services. The company also gets A’s in sales growth, operating margin growth, earnings growth, and return on equity. For more information, get Portfolio Grader’s complete analysis of INUV 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.