Six internet and web service stocks are moving up in their overall rating this week, according to the Portfolio Grader database. Every one of these is graded an “A” (“strong buy”) or “B” overall (“buy”).

Commtouch Software Ltd (CTCH) ups its rating to a B (“buy”) this week after earning a C (“hold”) in the week before. Commtouch Software provides messaging, antivirus, and Web security solutions to OEM customers, enterprises, and service providers primarily in Israel, North America, Europe, and Asia. In Portfolio Grader’s specific subcategory of Sales Growth, CTCH also gets an A. For more information, get Portfolio Grader’s complete analysis of CTCH stock.

IntraLinks Holdings, Inc.’s (IL) ratings are looking better this week, moving up to a B from last week’s C. IntraLinks Holdings provides Software-as-a-Service solutions for managing content, exchanging business information and collaborating within and among organizations. Shares of the stock have been trading at an exceptionally rapid pace, up 1169.9% from the week prior. For more information, get Portfolio Grader’s complete analysis of IL stock.

The rating of Sohu.com, Inc. (SOHU) moves up this week, rising from a C to a B. Sohu.com is an Internet media company that serves as a daily source of information, communication and entertainment for millions of Chinese consumers. For more information, get Portfolio Grader’s complete analysis of SOHU stock.

Akamai Technologies, Inc. (AKAM) gets a higher grade this week, advancing from a C last week to a B. Akamai Technologies provides services for accelerating and improving the delivery of content and applications over the Internet. Shares of the stock have been trading at an exceptionally rapid pace, up threefold from the week prior. For more information, get Portfolio Grader’s complete analysis of AKAM stock.

OpenTable, Inc. (OPEN) is seeing ratings go up from a C last week to a B this week. OpenTable provides free, real-time online restaurant reservations for diners through an online booking service. Shares of the stock have been changing hands at an unusually rapid pace, four times the rate of the week prior. For more information, get Portfolio Grader’s complete analysis of OPEN stock.

Jiayuan.com International Ltd. Sponsored ADR (DATE) earns a B this week, jumping up from last week’s grade of C. Jiayuan. com International is an online Chinese dating company. For more information, get Portfolio Grader’s complete analysis of DATE 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.