This week, 6 Software stocks are improving their overall ratings on Portfolio Grader. Each of these stocks is rated an “A” (“strong buy”) or “B” overall (“buy”).

Tyler Technologies, Inc. (TYL) shows solid improvement this week. The company’s rating rises from a C to a B. Tyler Technologies, Inc. provides integrated software systems and related services for local-government entities such as counties and schools. The company also gets A’s in sales growth. For more information, get Portfolio Grader’s complete analysis of TYL stock.

CommVault Systems, Inc. (CVLT) is seeing ratings go up from a C last week to a B this week. CommVault Systems, Inc. provides data and information management software applications and related services. The company also gets A’s in earnings growth, earnings revisions, and earnings surprise. For more information, get Portfolio Grader’s complete analysis of CVLT stock.

Descartes Systems Group Inc. (DSGX) earns a A this week, jumping up from last week’s grade of B. Descartes Systems Group Inc. is a global provider of federated network and global logistics technology solutions that help its customers make and receive shipments and manage related resources. The company also gets A’s in earnings growth and earnings surprise. For more information, get Portfolio Grader’s complete analysis of DSGX stock.

This is a strong week for TubeMogul, Inc. (TUBE). The company’s rating climbs to B from the previous week’s C. The company also gets A’s in sales growth, earnings revisions, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of TUBE stock.

Zix Corporation (ZIXI) improves from a C to a B rating this week. Zix Corporation provides secure, Internet-based applications in a Software-as-a-Service (SaaS) model. The company also gets A’s in earnings growth. For more information, get Portfolio Grader’s complete analysis of ZIXI stock.

GlobalSCAPE, Inc.’s (GSB) ratings are looking better this week, moving up to a A from last week’s B. The company also gets A’s in operating margin growth, earnings growth, earnings revisions, and return on equity. For more information, get Portfolio Grader’s complete analysis of GSB 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.