Which has the lower trailing P/E, DUOL or QLYS?

DUOL has the lower trailing P/E: DUOL trades at 17.32 and QLYS at 33.44. P/E is one valuation measure and does not by itself establish which business is cheaper.

Which has grown faster, DUOL or QLYS?

Over the past five years, DUOL grew revenue faster — DUOL at a 40.70% CAGR versus QLYS at 12.87%.

Is DUOL or QLYS more profitable?

DUOL runs the higher net margin — DUOL at 35.87% versus QLYS at 29.34%.

How have DUOL and QLYS total returns compared?

Over the past 5 years, DUOL delivered -1.81% and QLYS delivered 10.97% annualized total return. Past performance doesn't predict future results.

Duolingo, Inc. (DUOL) vs Qualys, Inc. (QLYS)

A side-by-side comparison of Duolingo, Inc. and Qualys, Inc. across valuation, profitability, dividends, and growth — built entirely from reported fundamentals, as of October 2, 2026. Differences are shown without an overall score or investment verdict.

DUOL

Duolingo, Inc.

$6.73B

$144.41TechnologyDelayed quote: Oct 2, 2026, 3:55 PM EDT

QLYS

Qualys, Inc.

$6.81B

$193.31TechnologyDelayed quote: Oct 2, 2026, 3:55 PM EDT

Total return — DUOL vs QLYS

growth of $100 · dividends reinvested · last 5y

DUOL +5.4% (+1.1%/yr)QLYS +85.8% (+13.2%/yr)QLYS compounded faster over this window

DUOL QLYS

DUOL vs QLYS: by the numbers

•QLYS is the larger company ($6.81B vs $6.73B market cap).
•DUOL trades at the lower trailing earnings multiple (17.32 vs 33.44 P/E), one valuation lens rather than an overall verdict.
•DUOL converts more revenue to profit (35.87% vs 29.34% net margin).
•DUOL grew revenue faster over the past five years (40.70% vs 12.87% CAGR).

Metrics side by side

Valuation

Metric	DUOL	QLYS
P/E ratio	17.32	33.44
Forward P/E	52.51	24.68
PEG ratio	N/A	1.72
P/S ratio	5.88	9.67
P/B ratio	4.77	12.11
EV / EBITDA	31.63	25.82
FCF yield	6.02%	4.61%

Profitability

Metric	DUOL	QLYS
Gross margin	72.34%	83.45%
Operating margin	14.18%	34.61%
Net margin	35.87%	29.34%
ROE	29.14%	36.74%
ROIC	10.85%	30.65%

Growth (annualized)

Metric	DUOL	QLYS
Revenue CAGR (5Y)	40.70%	12.87%
EPS CAGR (5Y)	N/A	18.60%
FCF CAGR (5Y)	91.58%	12.05%
Total return CAGR (5Y)	-1.81%	10.97%

Frequently asked

Which has the lower trailing P/E, DUOL or QLYS?: DUOL has the lower trailing P/E: DUOL trades at 17.32 and QLYS at 33.44. P/E is one valuation measure and does not by itself establish which business is cheaper.
Which has grown faster, DUOL or QLYS?: Over the past five years, DUOL grew revenue faster — DUOL at a 40.70% CAGR versus QLYS at 12.87%.
Is DUOL or QLYS more profitable?: DUOL runs the higher net margin — DUOL at 35.87% versus QLYS at 29.34%.
How have DUOL and QLYS total returns compared?: Over the past 5 years, DUOL delivered -1.81% and QLYS delivered 10.97% annualized total return. Past performance doesn't predict future results.

Go deeper

Full DUOL analysis Full QLYS analysis Interactive comparison tool

Dig into the metrics

Duolingo P/E ratio Qualys P/E ratio Duolingo ROE Qualys ROE Duolingo operating margin Qualys operating margin Duolingo revenue growth Qualys revenue growth Duolingo free cash flow Qualys free cash flow

Duolingo & Qualys appear in these rankings

Fastest Revenue Growth Stocks Highest ROE Stocks Highest ROIC Stocks Highest Operating Margin Stocks

Figures are sourced from reported fundamentals and the latest end-of-day price. This comparison is informational only and is not investment advice. Past performance does not predict future results. See our methodology. Compiled by TGMCharts Research · data verified October 2, 2026.