DUOL
Duolingo, Inc.
Technology · Software - Application · United States · Stock
Score Breakdown
Scored for Aggressive Growth profile
Sub-scores are 0–20 each; Model Score is weighted by your selected investment goal. How it works →
Why Ranked Here
- The growth sub-score of 20.0 and momentum sub-score of 13.0 together contribute 33 of the available 80 non-dividend/theme points, anchoring the overall score meaningfully above mid-range and reflecting Duolingo's demonstrated revenue and earnings trajectory from its FY 2025 filing.
- The profitability sub-score of 17.6 adds substantial weight to the total, indicating that while full-scale efficiency has not been achieved, operating and net margin metrics are positive and meaningful, preventing a score collapse into the low ranges.
- The financial health sub-score of 6.0 acts as a significant drag, pulling the composite score below what the growth and profitability metrics alone would imply, and is the primary reason the score lands at 51.6 rather than in the 60s or 70s.
Why Not Higher
- The financial health sub-score of 6.0 out of 20 is the single largest constraint on the total score — a materially higher reading here would have meaningfully lifted the composite toward the 60-70 range, suggesting balance sheet leverage or coverage ratios from the 10-K are a binding limitation.
- The theme sub-score of 0.0 means Duolingo receives no credit for macro thematic alignment in the model, forgoing up to 20 points that could have been earned if the filing-derived data had mapped to identifiable structural tailwinds such as AI integration, international expansion metrics, or platform economy themes.
Data Confidence
6 / 10
Medium — some data gaps
Research Summary
AI-generated analysis reflects data and conditions as of the report date shown above. Verify any specific figures through primary sources before acting on this analysis.
Duolingo, Inc. is a U.S.-based consumer technology company that operates the world's most widely used language-learning platform, offering gamified language courses through a freemium mobile application with a paid subscription tier called Duolingo Super. The company's model score of 51.6/100 reflects a genuinely mixed picture derived from its FY 2025 10-K filing: strong top-line growth and improving quarterly momentum push its growth sub-score to a full 20.0 and its momentum sub-score to 13.0, signaling consistent revenue expansion and sequential operational improvement. However, profitability remains a structural challenge — the 17.6 profitability sub-score suggests margins and returns on assets are present but not yet at a level that would characterize a mature, highly profitable software business — and the financial health sub-score of just 6.0 indicates elevated leverage or a balance sheet configuration that introduces meaningful risk. The dividend sub-score of 0.0 is unsurprising for a growth-stage technology company that reinvests capital rather than distributing it, and the theme sub-score of 0.0 reflects the model's inability to map macro thematic exposure from the available filing data. The core research tradeoff with Duolingo centers on whether its strong revenue growth trajectory can translate into durable, scaled profitability before balance sheet constraints or competitive dynamics become limiting factors. The 'aggressive growth' goal profile is the best-fit at 72.5, suggesting the company's filing-derived metrics align most closely with researchers seeking high-growth, pre-scale opportunities rather than value, income, or defensive positioning. With only 6 of 10 core metrics successfully mapped from EDGAR filings and a confidence score of 6.0/10, some uncertainty remains in the overall assessment, meaning conclusions should be held with appropriate analytical caution.
Plain English
Duolingo is the company behind the popular green owl language-learning app — you can learn Spanish, French, Japanese, and dozens of other languages for free on your phone, with an optional paid subscription for an ad-free experience. The model score of 51.6 out of 100 means the research model sees some genuinely strong signals, especially around revenue growth, but also real concerns around financial health and profitability that keep it from scoring higher. The High risk rating reflects the fact that this is a growth-stage technology company where the path to scaled, consistent profits is still being proven out, which means the outcome range for a researcher is wide in both directions.
Bull Case vs. Bear Case
Bull Case
- The growth sub-score of 20.0 out of 20 — the maximum possible — indicates that Duolingo's year-over-year revenue, net income, and EPS growth metrics derived from its FY 2025 10-K are among the strongest in the model's scoring framework, reflecting sustained top-line expansion.
- The momentum sub-score of 13.0 out of 20 signals that quarterly trends in revenue, earnings, and margins are improving sequentially, suggesting the business is not merely growing but accelerating or at least maintaining positive operational trajectory through the most recent reported periods.
- With a best-fit aggressive growth profile score of 72.5, Duolingo's filing-derived metrics are well-suited for researchers evaluating high-growth software companies, and its freemium-to-subscription model provides a large addressable user base that could continue to convert to paid tiers as the platform adds features.
Bear Case
- The financial health sub-score of only 6.0 out of 20 is the weakest component in the model's assessment and points to leverage, interest coverage, or balance sheet conditions that represent a meaningful structural vulnerability relative to higher-scoring software peers.
- The profitability sub-score of 17.6 out of 20, while not poor in isolation, indicates that net margins, operating margins, and return on assets have not yet reached the level associated with a fully scaled, high-efficiency software business, leaving profitability durability as an open research question.
- The dividend and theme sub-scores are both 0.0, meaning Duolingo offers no income component and its filing-derived data did not map to identifiable macro thematic tailwinds, which limits its appeal to a narrow band of aggressive growth-oriented research profiles and leaves it vulnerable if growth sentiment cools.
What Could Change the Picture
Bullish Triggers
- A future filing that shows materially improved leverage ratios, stronger interest coverage, and a healthier balance sheet structure would directly lift the financial health sub-score from 6.0 and could push the composite model score well above 60.
- Sustained and accelerating improvement in operating and net margins — reflected in a higher profitability sub-score in subsequent annual filings — would signal that Duolingo is successfully converting its revenue growth into durable, scaled earnings power, strengthening the research case for aggressive growth profiles.
Bearish Triggers
- A deceleration in year-over-year revenue or EPS growth in a subsequent 10-K filing would directly erode the growth sub-score from its current maximum of 20.0, which is the primary pillar supporting the model score, and could cause the composite to fall meaningfully.
- Any deterioration in the balance sheet — such as increased debt load, declining interest coverage, or reduced liquidity — reflected in future EDGAR filings would further compress the already-low financial health sub-score of 6.0, raising the risk profile and weakening the overall research assessment.
Red Flags
- The financial health sub-score of 6.0 out of 20 is materially below average and suggests the FY 2025 10-K filing reflects leverage ratios or interest coverage metrics that warrant close scrutiny, particularly in a rising or sustained high-rate environment.
- Only 6 of 10 core metrics were successfully mapped from the EDGAR filing, which reduces model confidence to 6.0 out of 10 and means the overall score of 51.6 carries more estimation uncertainty than it would for a company with full data coverage.
Risk Profile
High RiskThe High risk rating for Duolingo reflects a combination of an elevated leverage or balance sheet concern captured in the 6.0 financial health sub-score, a profitability profile that is improving but not yet fully scaled, and the inherent uncertainty of a growth-stage consumer technology company whose model score rests heavily on sustained top-line expansion. Researchers should note that only 6 of 10 core metrics were mappable from the FY 2025 10-K filing, which introduces additional model uncertainty and means the true risk profile may be wider than the score alone conveys.
Key Catalysts to Watch
The key factors to monitor in future EDGAR filings for Duolingo are the trajectory of operating and net margins — which will determine whether profitability sub-scores improve toward the level of scaled software peers — and any changes to the debt or leverage structure that could shift the financial health sub-score significantly in either direction. Researchers should also watch whether subsequent 10-K filings provide sufficient data to close the gap on the four currently unmapped core metrics, as fuller data coverage would increase model confidence beyond the current 6.0 out of 10.
This report is for educational and research purposes only. It does not constitute financial, investment, legal, or tax advice — always conduct your own due diligence before making investment decisions.