Duolingo, Inc. (DUOL): what the price requires
At today's price, Duolingo, Inc. (DUOL) is priced for today's economics sustained for ~8.7 years. boothcheck doesn't publish a fair value or a price target; it shows what the price assumes, so you can judge whether that bar is too high.
Generated: 2026-07-14 · Exported: 2026-07-17 · Source: https://boothcheck.com/report/DUOL
Headline
| Field | Value |
|---|---|
| Ticker | DUOL |
| Company | Duolingo, Inc. |
| Current price | $131.27/sh |
| Composition | Subscription 84% / Other (advertising, Duolingo English Test, in-app purchases) 16% |
What The Price Requires (Inversion)
The assumption today's price embeds, recovered by inverting the valuation.
| Field | Value |
|---|---|
| Inversion basis | whole-company |
| Operating margin needed | 7.4% |
| Operating margin today | 13.1% |
| Margin compression implied | -5.7pp |
| Must persist for | 8.7y |
| Multiple paid | 39x operating income |
The operating-margin requirement is derived from the framework's value band at year 4, a separately labeled basis from the headline growth/duration solve.
Solve inputs: computed at a 11.6% cost of capital; growth searched up to the 31.8% self-funding ceiling; each 1pp moves the implied horizon ~1.3 years.
Reconcile: at the x-ray's 9.3% required return this reads ~5.8 years; the models below use their own rates.
How unusual the bet is: elevated
| Reference | Value |
|---|---|
| cohort percentile (of 177 peers) | 69 |
| sustained it ~8.7 years at this level | 11% |
| implied end-window share | 0% |
Valuation X-Ray
The price is justified by relative-multiple and growth-DCF.
How the valuation models price the stock relative to the market price. Price/FV above 1.0 means the market pays more than that lens defends (expensive); at or below 1.0 the lens can defend the price.
| Family | Median price/FV | Models | Reads |
|---|---|---|---|
| Asset | 1.41x | 5 | expensive |
| Earnings | 1.39x | 5 | expensive |
| Relative | 0.73x | 5 | justifies |
| Growth | 0.65x | 3 | justifies |
Families that justify the price: Relative, Growth
The models below discount at their own flat-beta convention rates (cost of equity 9.3%, WACC 9.1%); the inversion above states its own rate.
Per-Model Detail (n=18)
| Model | Family | FV | Price/FV | Applicable | Methodology |
|---|---|---|---|---|---|
| DCF Perpetual Growth | Growth | $393.62 | 0.33x | yes | FCF base $0.5B, growth 25% (input: historical growth), terminal g 4.0%, WACC 9.1%, 7yr projection |
| DCF Exit Multiple | Growth | $202.24 | 0.65x | yes | Exit EV/EBITDA: 29.9x / 31.9x / 33.9x (bear / base = today's held flat / bull), 7yr |
| Relative Valuation | Relative | $193.70 | 0.68x | yes | P/E 27.09x (blended: static sector reference 35x + trailing (TTM) 15x), scenarios: 21.7x / 27.1x / 32.5x (bear / base = reference held flat / bull), EV/EBITDA 25x |
| Simple DDM | Growth | — | — | no | — |
| Two-Stage DDM | Growth | — | — | no | — |
| Simple Excess Return | Asset | $93.22 | 1.41x | yes | BV/sh $28.41, ROE (TTM) 30.3%, ke 9.3% |
| Two-Stage Excess Return | Asset | $174.63 | 0.75x | yes | 5yr excess ROE then converge to ke=9.3% |
| Discounted Future Market Cap | Growth | $190.47 | 0.69x | yes | Rev $1.1B, growth 30% (input: historical growth; tapered), Terminal P/S: 4.7x / 5.9x / 7.0x (bear / base = today's held flat / bull, cap 12x) |
| Peter Lynch Fair Value | Relative | $104.88 | 1.25x | yes | EPS $8.74, growth 2% (input: historical EPS growth), PEG=7.61 (Overvalued) |
| Margin Trajectory | Growth | — | — | no | — |
| Earnings Power Value | Earnings | $23.61 | 5.56x | yes | Normalized EBIT (5y avg op income, one-time charges added back) $0.02B × (1−22%) / WACC 9.1% → EPV (no growth) |
| Residual Income | Asset | $142.39 | 0.92x | yes | BV $28.41 + 5yr PV of (ROE (TTM) 30.3% − Kₑ 9.3%) × BV; BV grows 8.8%/yr |
| Graham Number | Asset | $74.75 | 1.76x | yes | √(22.5 × EPS $8.74 × BVPS $28.41) — Graham's conservative floor |
| EV/EBITDA Relative | Relative | $107.01 | 1.23x | yes | EBITDA $0.17B × sector EV/EBITDA 25.0x |
| FCF Yield | Earnings | $111.30 | 1.18x | yes | FCF $416.0M / Kₑ 9.3% — zero-growth perpetuity |
| SBC-Adj FCF Yield | Earnings | $80.17 | 1.64x | yes | SBC-adj FCF $0.27B (FCF $0.42B − SBC $0.14B) capitalized at Kₑ |
| Ben Graham Formula | Earnings | $282.01 | 0.47x | yes | EPS $8.74 × (8.5 + 2×15.0%) × (4.4 / 5.3%) |
| ROIC-Justified P/B | Asset | $24.87 | 5.28x | yes | BV $28.41 × (ROIC 8.0% / WACC 9.1%) |
| P/Sales Sector | Relative | $179.45 | 0.73x | yes | Revenue $1.10B × sector P/S 8.0x |
| PEG Fair Value | Relative | $327.75 | 0.40x | yes | EPS $8.74 × (PEG 1.5 × growth 25.0% (input: historical EPS growth)) → PE 37.5x |
| Earnings Yield | Earnings | $94.49 | 1.39x | yes | EPS $8.74 / required return 9.3% (Rf 4.3% + ERP 5.0%) |
| Funds From Operations Multiple | Relative | — | — | no | — |
| Clinical Phase NPV | Growth | — | — | no | — |
| Merton | Asset | — | — | no | — |
| V5 Mechanical | — | — | — | no | — |
Solvency
| Field | Value |
|---|---|
| Net cash | $1.1b |
| Net debt / NOPAT (after-tax) | -10.65x (net cash) |
| Net debt / operating income (pre-tax) | -8.33x (net cash) |
| Share count CAGR (dilution) | 6.1% |
| Burning cash | no |
Interest expense is not separately reported in the latest filings, so interest coverage cannot be computed.
Bullet Takeaways
- Duolingo is more profitable than its growth-stock reputation implies: Q1 2026 free cash flow was $147.8 million, a margin above 50%, on a 73% gross margin and a freemium funnel where free daily users are the marketing budget.
- The biggest risk is duration, not rate: at about 32 times operating income the price needs operating growth held near its 25% ceiling for roughly twelve years, a persistence only about 15% of fast-growers have managed for a decade.
- Watch the deceleration: bookings grew 14% in Q1 against 27% revenue growth, and full-year 2026 guidance points to about 10.5% bookings and 16.1% revenue growth, while the share count rose about 6% over the year, diluting each future dollar of profit.
Bull Case
The surprising number is not the user growth everyone talks about; it is the cash. Duolingo, a company most investors file under speculative consumer-app growth, converted the first quarter of 2026 into $147.8 million of free cash flow, a margin above 50% of revenue. That does not fit the obvious narrative of a hype stock burning money to buy attention. The reason is structural: subscriptions are paid up front for a year of access, so cash arrives before the income statement recognizes it, and the underlying product carries almost no marginal cost. The 10-K shows the cash engine plainly, reporting "$996.3 million and $730.7 million of subscription bookings, respectively, representing an increase of $265.5 million or 36%" for 2025 and 2024, "driven by growth in both first-time and renewal subscriptions". Bookings growing faster than revenue means the install base is deepening before the reported numbers catch up.
The engine underneath is a freemium funnel that turns a free daily habit into a paid one at almost no incremental cost. Free users are not a drag; they are the marketing budget, and the gross margin reflects it at 73%. The first quarter showed the funnel still widening, with daily active users up 21% to 56.5 million and paid subscribers up 21% to 12.5 million, on revenue up 27% to $291.9 million. A consumer app that keeps adding daily users while charging a growing slice of them, at that gross margin, is a rare combination of scale and profitability.
The financial position lets the company press the advantage without dilution risk to the balance sheet. Duolingo holds over $1.1 billion of net cash against minimal debt, so it can fund product investment, including its push into AI-driven features and new subjects, from its own cash flow. The bet the bull is making is not that the company will someday become profitable; it already is, at a 14.2% operating margin and a near-29% adjusted EBITDA margin. The bet is that the daily habit keeps compounding the subscriber base for years. On the current trajectory, with cash flowing and the funnel widening, that is a more grounded growth story than the speculative label suggests.
Bear Case
Here is the structural truth a holder would rather not face: at this price the market has already booked more than a decade of sustained high growth that has not happened yet. At roughly 32 times operating income, the quote implies company-wide operating growth held near its self-funding ceiling for about twelve years. The rate is not the stretch; Duolingo has recently grown faster than that. The duration is the stretch, and duration is exactly what history rarely delivers. Of the comparable fast-growers, only about 15% sustained that kind of pace for even a single decade. The price is not paying for what the company is; it is paying for what the company would have to keep being, far longer than most companies in its position manage.
The growth is also visibly moderating right as the multiple demands persistence. Bookings, the leading indicator the bull leans on, grew 14% in the first quarter, well below the 27% revenue print, and management guides full-year 2026 bookings growth around 10.5% and revenue growth around 16.1%. That is healthy for most businesses and a deceleration for this one, and a name priced for twelve years near a 25% ceiling has little room for the growth rate to step down toward the mid-teens this early. The gap between the near-term guide and the embedded long-run assumption is the soft spot in the thesis.
The valuation evidence underneath confirms where the support sits and where the bet begins. The methods that value the business on what it earns and owns today, the asset-value and earnings-power lenses, land below the price, meaning the demonstrated economics do not by themselves reach the quote. The forward-growth and peer-multiple lenses sit above it, but they reach the price only by crediting the growth in advance. So the floor under the stock is the cash-generative business it is today, and everything above that floor is a wager on persistence. Dilution sharpens the point: the share count rose about 6% over the year, so each future dollar of profit is spread across more shares, and the stock-based compensation that drives it is a real cost the adjusted figures set aside. The bet is that the daily habit compounds for a decade-plus. The bear simply notes the price already assumes it does.
Valuation
Today's price is a wager on duration. At about 32 times operating income, the quote implies company-wide operating growth held near its 25% self-funding ceiling for roughly twelve years. The near-term rate is within reach of what Duolingo has recently delivered; the demanding part is the length of the runway, and only about 15% of comparable fast-growers have kept that pace going for even a decade. The price is not betting on a higher growth rate so much as on the absence of the fade that usually arrives.
The families of method split cleanly on whether that wager is earned, and the split is the information. The asset-value and earnings-power lenses, which credit only what the company owns and earns today, sit below the price, so the demonstrated economics alone do not reach the quote. The forward-growth and peer-multiple lenses sit above it, near 0.6 of where they value the business, but they get there by crediting the growth ahead. Read together, the pattern says there is a real, cash-generative floor under the stock, and the distance from that floor to the price is the persistence premium. This is a name where the value you can defend on today's numbers is genuine but well short of the quote, and the rest is the durability bet.
Solvency is not a concern and does not belong in the downside calculus: Duolingo holds over $1.1 billion of net cash and generates free cash flow at better than a 50% margin, so it funds its own growth without touching the equity for capital. The decisive variable is not the balance sheet; it is duration. If the daily habit keeps compounding the subscriber base near the recent pace, the forward-growth lenses are right and the price is earned. If bookings growth keeps stepping down toward the guided mid-teens, the asset and earnings-power floor is the honest anchor, and the persistence premium has less beneath it than the quote assumes.
Catalysts
The most recent quarter set the tone for the year. Duolingo reported Q1 2026 revenue of $291.9 million, up 27% year over year, with daily active users up 21% to 56.5 million and paid subscribers up 21% to 12.5 million. EPS of $0.89 beat the roughly $0.79 consensus, gross margin held at 73%, net income was $43.5 million, and adjusted EBITDA reached $83.4 million at a 28.6% margin. Free cash flow of $147.8 million, just over half of revenue, underscored the cash conversion that defines the business. The user figures landing in line with the company's own expectations matters for a thesis that rests on the persistence of the daily habit rather than a single quarter's beat.
The forward picture is moderating growth on an expanding margin. Bookings grew 14% to $308.5 million, slower than revenue, and management guides full-year 2026 bookings growth of about 10.5% and revenue growth of about 16.1%, with adjusted EBITDA around $310 million at a roughly 25.7% margin. That framing, slower top line and stepped-up profitability, is the central tension for a stock priced on a long growth runway: the margin story is intact, but the growth story is decelerating.
The product roadmap is the wildcard. Duolingo continues to invest in AI-driven features and new subjects beyond language, the kind of expansion that could re-accelerate engagement if it lands, and the quarterly daily-active-user and paid-subscriber trends are the cleanest read on whether it does. Those metrics, plus the trajectory of bookings against the guided deceleration, are the events most likely to move the thesis over the next several quarters.
Peer Cohorts (Per Segment, With Filing Citations)
Language-learning platform (single reportable & operating segment) (reported)
- LIF (Life360, Inc.)
- (no filing in the citation store)
- SEMR (Semrush Holdings, Inc.)
- (no filing in the citation store)
- FRSH (Freshworks Inc.)
- (no filing in the citation store)
- KVYO (Klaviyo, Inc.)
- (no filing in the citation store)
- VEEV (Veeva Systems Inc.)
- (no filing in the citation store)
- GWRE (Guidewire Software, Inc.)
- (no filing in the citation store)
- PATH (UiPath, Inc.)
- (no filing in the citation store)
- ESTC (Elastic N.V.)
- (no filing in the citation store)
Methodology Note
- Priced-in inversion: the valuation is inverted on the current price to recover the operating-income growth, duration, and steady-state margin the price embeds (ROE for financials, FFO growth for REITs).
- Valuation x-ray: the valuation models, grouped into four families (asset, earnings, relative, growth). Each model is expressed as a price/FV ratio (distance from price), not a point fair-value estimate. The spread across families is the disagreement.
- Solvency: net cash/debt, net-debt-to-NOPAT, interest coverage, and share-count CAGR from EDGAR financials (net debt / FFO and fixed-charge coverage for REITs; regulatory-capital framing for financials).
- Peer cohorts: per-segment comparables with deep-linkable SEC filing citations.
Fundamentals sourced from SEC EDGAR filings. Current price from Databento. The priced-in inversion and valuation x-ray are computed by the boothcheck engine; narrative composed by AI from the structured data.
Sources
Q1 2026 earnings release