Investors interested in stocks from the Outsourcing sector have probably already heard of Genpact (G) and Paychex (PAYX). But which of these two companies is the best option for those looking for undervalued stocks? Let's take a closer look.Everyone has their own methods for finding great value opportunities, but our model includes pairing an impressive grade in the Value category of our Style Scores system with a strong Zacks Rank. The Zacks Rank favors stocks with strong earnings estimate revision trends, and our Style Scores highlight companies with specific traits.Currently, both Genpact and Paychex are holding a Zacks Rank of # 2 (Buy). This system places an emphasis on companies that have seen positive earnings estimate revisions, so investors should feel comfortable knowing that these stocks have improving earnings outlooks. But this is just one piece of the puzzle for value investors.Value investors analyze a variety of traditional, tried-and-true metrics to help find companies that they believe are undervalued at their current share price levels.The Style Score Value grade factors in a variety of key fundamental metrics, including the popular P/E ratio, P/S ratio, earnings yield, cash flow per share, and a number of other key stats that are commonly used by value investors.G currently has a forward P/E ratio of 16.78, while PAYX has a forward P/E of 32.71. We also note that G has a PEG ratio of 1.13. This metric is used similarly to the famous P/E ratio, but the PEG ratio also takes into account the stock's expected earnings growth rate. PAYX currently has a PEG ratio of 4.36.Another notable valuation metric for G is its P/B ratio of 4.45. The P/B is a method of comparing a stock's market value to its book value, which is defined as total assets minus total liabilities. By comparison, PAYX has a P/B of 13.75.These are just a few of the metrics contributing to G's Value grade of B and PAYX's Value grade of D.Both G and PAYX are impressive stocks with solid earnings outlooks, but based on these valuation figures, we feel that G is the superior value option right now. Just Released: Zacks Top 10 Stocks for 2022 In addition to the investment ideas discussed above, would you like to know about our 10 top buy-and-hold tickers for the entirety of 2022? Last year's 2021 Zacks Top 10 Stocks portfolio returned gains as high as +147.7%. Now a brand-new portfolio has been handpicked from over 4,000 companies covered by the Zacks Rank. Don’t miss your chance to get in on these long-term buysAccess Zacks Top 10 Stocks for 2022 today >>Want the latest recommendations from Zacks Investment Research? Today, you can download 7 Best Stocks for the Next 30 Days. Click to get this free report Genpact Limited (G): Free Stock Analysis Report Paychex, Inc. (PAYX): Free Stock Analysis Report To read this article on Zacks.com click here. Zacks Investment Research