COE vs DUOL

For growth investors, 51Talk Online Education Group (COE) is the stronger pick with 87.

0% revenue growth year-over-year, versus 38. 7% for Duolingo, Inc. (DUOL). Duolingo, Inc. (DUOL) offers the better valuation at 12. 6x trailing P/E (38. 2x forward), making it the more compelling value choice. Analysts rate 51Talk Online Education Group (COE) a "Buy" — based on 2 analyst ratings — the highest consensus in this comparison. The "better buy" depends entirely on your goals: growth investors should weight revenue trajectory, value investors should weight P/E and PEG, and income investors should weight dividend yield and streak.

On forward P/E, Duolingo, Inc.

is actually cheaper at 38. 2x.

Over the past 5 years, Duolingo, Inc.

(DUOL) delivered a total return of -22. 3%, compared to -69. 2% for 51Talk Online Education Group (COE). Over 10 years, the gap is even starker: DUOL returned -22. 3% versus COE's -68. 9%. Past returns do not guarantee future results, and the stock with the higher historical return may already have its best growth priced in.

By beta (market sensitivity over 5 years), 51Talk Online Education Group (COE) is the lower-risk stock at 0.

91β versus Duolingo, Inc. 's 0. 95β — meaning DUOL is approximately 5% more volatile than COE relative to the S&P 500.

By revenue growth (latest reported year), 51Talk Online Education Group (COE) is pulling ahead at 87.

0% versus 38. 7% for Duolingo, Inc. (DUOL). On earnings-per-share growth, the picture is similar: Duolingo, Inc. grew EPS 355. 9% year-over-year, compared to 50. 0% for 51Talk Online Education Group. Over a 3-year CAGR, COE leads at 300. 7% annualised revenue growth. Higher growth typically commands a higher valuation multiple — check whether the premium P/E or P/S is justified by the growth rate using the PEG ratio.

Duolingo, Inc.

(DUOL) is the more profitable company, earning 39. 9% net margin versus -14. 3% for 51Talk Online Education Group — meaning it keeps 39. 9% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: DUOL leads at 13. 1% versus -15. 9% for COE. At the gross margin level — before operating expenses — COE leads at 78. 0%, reflecting greater pricing power or product mix advantage. Stronger margins indicate durable pricing power, lower cost of revenue, or higher mix of software/services. They are one of the clearest signs of business quality.

On forward earnings alone, Duolingo, Inc.

(DUOL) trades at 38. 2x forward P/E versus 417. 0x for 51Talk Online Education Group — 378. 7x cheaper on a one-year earnings basis.

None of the stocks in this comparison currently pay a material dividend.

All are effectively zero-yield and should be held for capital appreciation rather than income.

For long-horizon retirement investors, 51Talk Online Education Group (COE) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 0.

91)). Both have compounded well over 10 years (COE: -68. 9%, DUOL: -22. 3%), confirming both are viable long-term holds — but the lower-volatility option typically results in less emotional selling during corrections. Retirement portfolios generally favour predictability over maximum returns. Consult a financial advisor before making allocation decisions.

Both stocks operate in the Technology sector, making this a peer-level intra-sector comparison — the same macro tailwinds and headwinds will affect both.

These fundamental differences mean investors should not choose between them on a single metric — the "better stock" depends entirely on which of these characteristics aligns with your investment strategy.