DUOLDuolingo, Inc.

$149.79-49% 1Y

Is the business good?

Mixed

The checks split: earnings fully cash-backed (3.5×) and margins widening, but 3 of 9 health tests passed.

3 good, 1 to watch
Fundamental health (F-score)3 / 9SEC EDGAR · Dec 31, 2025

Weak, deteriorating fundamentals. Nine pass/fail tests of year-over-year health from the filings.

Profits arrive as cash3.47×derived · Jun 30, 2026

Operating profit is fully backed by cash. Conversion is worsening vs a year ago.

Margin direction, 3 years+26.1 pts

Positive operating leverage, operating profit is growing faster than sales, so margins widen as the business scales.

Where ROE comes from20% ROA

High-quality, exceptional returns on the assets themselves, not leverage. ROE 30% = margin × turnover × leverage.

Unless marked, from derived.

Against the whole market›

Percentile against every name Ryufin tracks. Higher is better; the tick marks the middle of the market. Context, not one of the checks above.

FCF conversionmiddle of the market

Where this answer is blind. The F-score rewards improvement, so an already-elite company can score mid-pack.

How good a business is DUOL?

Duolingo, Inc. earns 54% on the capital it employs against a 9.0% cost of capital, so the business is worth more the bigger it gets.

54%

Return on invested capital · cost of capital 9.0% · 45 points above what the capital costs: growth creates value

Operating margin
14%

Operating margin · Software - Application median 6.4% · 12 months to Q2 2026

Cash conversion
3.47×

Cash conversion · 4.39× a year ago · operating cash flow covers the operating profit after tax

Share count, year on year
+2.1%

Share count, year on year · shareholders own a smaller slice than a year ago

Operating margin by fiscal year
YearOperating margin
FY2020−9.9%
FY2021−24%
FY2022−18%
FY2023−2.5%
FY20248.4%
FY202513%
Details›
Gross margin12 months to Q2 2026
73%
Operating margin12 months to Q2 2026
14%
Net margin12 months to Q2 2026
36%
Free cash flow margin
36%
R&D as % of revenue
29%
Revenue, trailing twelve months
$1.15B
Free cash flow, trailing twelve months
$408M
Net income, trailing twelve months
$411M
Return on invested capitaloperating profit after tax ÷ debt + equity − cash
54%

Margins, capital and share counts from the statements as filed with the SEC; cash conversion is operating cash flow over operating profit after tax.