This week, 6 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”).

MercadoLibre, Inc. (MELI) boosts its rating from a C to a B this week. MercadoLibre, Inc. operates an online trading site for the Latin American markets. The company also gets A’s in earnings growth, earnings surprise, earnings momentum, and return on equity. For more information, get Portfolio Grader’s complete analysis of MELI stock.

Alibaba Group Holding Ltd. Sponsored ADR (BABA) improves from a C to a B rating this week. The company also gets A’s in sales growth, earnings growth, earnings revisions, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of BABA stock.

Unwired Planet, Inc. (UPIP) earns a B this week, jumping up from last week’s grade of C. Unwired Planet, Inc. develops patents that allow mobile devices to connect to the Internet. The company also gets A’s in earnings surprise and earnings momentum. For more information, get Portfolio Grader’s complete analysis of UPIP stock.

BroadVision, Inc.’s (BVSN) ratings are looking better this week, moving up to a B from last week’s C. BroadVision, Inc. develops, markets, and supports enterprise portal applications that enable companies to unify their e-business infrastructure and conduct both interactions and transactions with employees, partners and customers through a personalized self-service model that increases revenues, reduces costs, and improves productivity. For more information, get Portfolio Grader’s complete analysis of BVSN stock.

This is a strong week for Remark Media, Inc. (MARK). The company’s rating climbs to B from the previous week’s C. Remark Media, Inc. is focused on developing social media businesses that incorporate relevant, high quality content. The company also gets A’s in sales growth. For more information, get Portfolio Grader’s complete analysis of MARK stock.

This week, MeetMe, Inc. (MEET) pushes up from a B to a A rating. MeetMe, Inc. a social media technology company, owns and operates social discovery networking platforms in the United States. The company also gets A’s in sales growth and earnings revisions. For more information, get Portfolio Grader’s complete analysis of MEET 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.