Which has grown faster, AAOI or DUOL?

Over the past five years, DUOL grew revenue faster — AAOI at a 20.68% CAGR versus DUOL at 40.70%.

Is AAOI or DUOL more profitable?

DUOL runs the higher net margin — AAOI at -9.57% versus DUOL at 35.87%.

How have AAOI and DUOL total returns compared?

Over the past 5 years, AAOI delivered 69.92% and DUOL delivered -3.69% annualized total return. Past performance doesn't predict future results.

Applied Optoelectronics, Inc. (AAOI) vs Duolingo, Inc. (DUOL)

A side-by-side comparison of Applied Optoelectronics, Inc. and Duolingo, Inc. across valuation, profitability, dividends, and growth — built entirely from reported fundamentals, as of September 13, 2026. Differences are shown without an overall score or investment verdict.

AAOI

Applied Optoelectronics, Inc.

$7.72B

$96.15TechnologyDelayed quote: Sep 15, 2026, 12:20 PM EDT

DUOL

Duolingo, Inc.

$7.17B

$153.94TechnologyDelayed quote: Sep 15, 2026, 12:20 PM EDT

Total return — AAOI vs DUOL

growth of $100 · dividends reinvested · last 5y

AAOI +1295.5% (+69.4%/yr)DUOL +3.4% (+0.7%/yr)AAOI compounded faster over this window

Log scale — wide-divergence pair

AAOI DUOL

AAOI vs DUOL: by the numbers

•AAOI is the larger company ($7.72B vs $7.17B market cap).
•DUOL is profitable (35.87% net margin) while AAOI runs a net loss (-9.57%).
•DUOL grew revenue faster over the past five years (40.70% vs 20.68% CAGR).

Metrics side by side

Valuation

Metric	AAOI	DUOL
P/E ratio	N/A	18.46
Forward P/E	129.93	55.97
P/S ratio	12.95	6.26
P/B ratio	4.63	5.09
EV / EBITDA	N/A	34.12
FCF yield	N/A	5.65%

Profitability

Metric	AAOI	DUOL
Gross margin	28.92%	72.34%
Operating margin	-11.31%	14.18%
Net margin	-9.57%	35.87%
ROE	-3.42%	29.14%
ROIC	-3.49%	10.85%

Growth (annualized)

Metric	AAOI	DUOL
Revenue CAGR (5Y)	20.68%	40.70%
FCF CAGR (5Y)	N/A	91.58%
Total return CAGR (5Y)	69.92%	-3.69%

Frequently asked

Which has grown faster, AAOI or DUOL?: Over the past five years, DUOL grew revenue faster — AAOI at a 20.68% CAGR versus DUOL at 40.70%.
Is AAOI or DUOL more profitable?: DUOL runs the higher net margin — AAOI at -9.57% versus DUOL at 35.87%.
How have AAOI and DUOL total returns compared?: Over the past 5 years, AAOI delivered 69.92% and DUOL delivered -3.69% annualized total return. Past performance doesn't predict future results.

Go deeper

Full AAOI analysis Full DUOL analysis Interactive comparison tool

Dig into the metrics

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

Applied Optoelectronics & Duolingo appear in these rankings

Fastest Revenue Growth Stocks Highest ROE Stocks Highest FCF Yield Stocks Highest 10-Year Total Return 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 September 13, 2026.