Investors looking for stocks in the Internet - Services sector might want to consider either Lyft (LYFT) or The Trade Desk (TTD). 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.

Lyft and The Trade Desk are both sporting a Zacks Rank of # 2 (Buy) right now. 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 only part of the picture for value investors.

Value investors also tend to look at a number of traditional, tried-and-true figures to help them find stocks that they believe are undervalued at their current share price levels.

Our Value category highlights undervalued companies by looking at a variety of key metrics, including the popular P/E ratio, as well as the P/S ratio, earnings yield, cash flow per share, and a variety of other fundamentals that have been used by value investors for years.

LYFT currently has a forward P/E ratio of 12.34, while TTD has a forward P/E of 58.86. We also note that LYFT has a PEG ratio of 0.27. 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. TTD currently has a PEG ratio of 2.32.

Another notable valuation metric for LYFT is its P/B ratio of 8.22. Investors use the P/B ratio to look at a stock's market value versus its book value, which is defined as total assets minus total liabilities. By comparison, TTD has a P/B of 22.16.

These are just a few of the metrics contributing to LYFT's Value grade of B and TTD's Value grade of F.

Both LYFT and TTD are impressive stocks with solid earnings outlooks, but based on these valuation figures, we feel that LYFT is the superior value option right now.

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