NABL vs VRNS vs DDOG vs QLYS

For growth investors, Datadog, Inc.

(DDOG) is the stronger pick with 27. 7% revenue growth year-over-year, versus 9. 7% for N-able, Inc. (NABL). Qualys, Inc. (QLYS) offers the better valuation at 17. 5x trailing P/E (12. 9x forward), making it the more compelling value choice. Analysts rate Varonis Systems, Inc. (VRNS) a "Buy" — based on 34 analyst ratings — the highest consensus in this comparison. The "better buy" depends entirely on your goals: growth investors should weight revenue trajectory, value investors should weight P/E and PEG, and income investors should weight dividend yield and streak.

On trailing P/E, Qualys, Inc.

(QLYS) is the cheapest at 17. 5x versus Datadog, Inc. at 629. 1x. On forward P/E, N-able, Inc. is actually cheaper at 12. 0x — notably different from the trailing picture, reflecting expected earnings growth.

Over the past 5 years, Datadog, Inc.

(DDOG) delivered a total return of +144. 2%, compared to -67. 8% for N-able, Inc. (NABL). Over 10 years, the gap is even starker: DDOG returned +402. 6% versus NABL's -67. 8%. Past returns do not guarantee future results, and the stock with the higher historical return may already have its best growth priced in.

By beta (market sensitivity over 5 years), Qualys, Inc.

(QLYS) is the lower-risk stock at 0. 53β versus Datadog, Inc. 's 1. 40β — meaning DDOG is approximately 164% more volatile than QLYS relative to the S&P 500. On balance sheet safety, Qualys, Inc. (QLYS) carries a lower debt/equity ratio of 17% versus 96% for Varonis Systems, Inc. — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), Datadog, Inc.

(DDOG) is pulling ahead at 27. 7% versus 9. 7% for N-able, Inc. (NABL). On earnings-per-share growth, the picture is similar: Qualys, Inc. grew EPS 17. 0% year-over-year, compared to -156. 7% for N-able, Inc.. Over a 3-year CAGR, DDOG leads at 26. 9% annualised revenue growth. Higher growth typically commands a higher valuation multiple — check whether the premium P/E or P/S is justified by the growth rate using the PEG ratio.

Qualys, Inc.

(QLYS) is the more profitable company, earning 29. 6% net margin versus -20. 7% for Varonis Systems, Inc. — meaning it keeps 29. 6% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: QLYS leads at 33. 2% versus -23. 5% for VRNS. At the gross margin level — before operating expenses — QLYS leads at 82. 8%, reflecting greater pricing power or product mix advantage. Stronger margins indicate durable pricing power, lower cost of revenue, or higher mix of software/services. They are one of the clearest signs of business quality.

On forward earnings alone, N-able, Inc.

(NABL) trades at 12. 0x forward P/E versus 242. 2x for Varonis Systems, Inc. — 230. 2x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for QLYS: 41. 5% to $134. 30.

None of the stocks in this comparison currently pay a material dividend.

All are effectively zero-yield and should be held for capital appreciation rather than income.

For long-horizon retirement investors, Qualys, Inc.

(QLYS) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 0. 53), +267. 2% 10Y return). Both have compounded well over 10 years (QLYS: +267. 2%, DDOG: +402. 6%), confirming both are viable long-term holds — but the lower-volatility option typically results in less emotional selling during corrections. Retirement portfolios generally favour predictability over maximum returns. Consult a financial advisor before making allocation decisions.

Both stocks operate in the Technology sector, making this a peer-level intra-sector comparison — the same macro tailwinds and headwinds will affect both.

In terms of investment character: NABL is a small-cap quality compounder stock; VRNS is a small-cap quality compounder stock; DDOG is a mid-cap high-growth stock; QLYS is a small-cap deep-value stock. These fundamental differences mean investors should not choose between them on a single metric — the "better stock" depends entirely on which of these characteristics aligns with your investment strategy.