← Duolingo overview

Duolingo vs SISB: why the prices moved differently

Weekly · monthly · quarterly news summaries, side by side in time

Duolingo Inc (DUOL)

Q3 2026
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Duolingo's AI-Powered User Growth Battles Margin and Disruption Fears

  • AI-driven expansion fuels user and subscriber growth Duolingo is using AI to add new subjects like chess, math, and music, and to publish courses far faster. Daily active users and paid subscribers each grew about 21% in Q1, showing the strategy is bringing in more users and revenue.

    This explains the core growth engine behind DUOL's business and why investors are optimistic.

  • Q1 earnings beat with raised guidance and buyback Duolingo beat Q1 profit and revenue estimates, guided for 2026 bookings of $1.28 billion, and authorized a $400 million share buyback. Beating expectations and returning cash to shareholders supports the stock price.

    Strong financial results and capital returns directly boost investor confidence and the stock.

  • AI disruption fears and rising AI costs pressure margins Investors worry that advanced AI like OpenAI's ChatGPT could disrupt Duolingo's language-learning business. At the same time, rising AI computing costs are expected to lower gross margins to 69% by year-end, weighing on profitability and the stock.

    This is the main counterweight explaining why DUOL's stock has been volatile and under pressure.

  • Q2 earnings beat and accelerating user growth Duolingo beat Q2 estimates, raised its full-year EBITDA margin outlook, and later disclosed daily active user growth of 27.4% in August, suggesting momentum is speeding up. An analyst upgrade to Buy also lifted sentiment, though the broader consensus remains Hold.

    This shows the company is executing well and user growth is accelerating, which is the key driver of the stock's recent rebound.

July 2026
▲3▼1

Duolingo's AI-Powered User Growth Battles Margin and Disruption Fears

  • AI-driven expansion fuels user and subscriber growth Duolingo is using AI to add new subjects like chess, math, and music, and to publish courses far faster. Daily active users and paid subscribers each grew about 21% in Q1, showing the strategy is bringing in more users and revenue.

    This explains the core growth engine behind DUOL's business and why investors are optimistic.

  • Q1 earnings beat with raised guidance and buyback Duolingo beat Q1 profit and revenue estimates, guided for 2026 bookings of $1.28 billion, and authorized a $400 million share buyback. Beating expectations and returning cash to shareholders supports the stock price.

    Strong financial results and capital returns directly boost investor confidence and the stock.

  • AI disruption fears and rising AI costs pressure margins Investors worry that advanced AI like OpenAI's ChatGPT could disrupt Duolingo's language-learning business. At the same time, rising AI computing costs are expected to lower gross margins to 69% by year-end, weighing on profitability and the stock.

    This is the main counterweight explaining why DUOL's stock has been volatile and under pressure.

  • Q2 earnings beat and accelerating user growth Duolingo beat Q2 estimates, raised its full-year EBITDA margin outlook, and later disclosed daily active user growth of 27.4% in August, suggesting momentum is speeding up. An analyst upgrade to Buy also lifted sentiment, though the broader consensus remains Hold.

    This shows the company is executing well and user growth is accelerating, which is the key driver of the stock's recent rebound.

Latest
▲3▼1

Duolingo's AI-Powered User Growth Battles Margin and Disruption Fears

  • AI-driven expansion fuels user and subscriber growth Duolingo is using AI to add new subjects like chess, math, and music, and to publish courses far faster. Daily active users and paid subscribers each grew about 21% in Q1, showing the strategy is bringing in more users and revenue.

    This explains the core growth engine behind DUOL's business and why investors are optimistic.

  • Q1 earnings beat with raised guidance and buyback Duolingo beat Q1 profit and revenue estimates, guided for 2026 bookings of $1.28 billion, and authorized a $400 million share buyback. Beating expectations and returning cash to shareholders supports the stock price.

    Strong financial results and capital returns directly boost investor confidence and the stock.

  • AI disruption fears and rising AI costs pressure margins Investors worry that advanced AI like OpenAI's ChatGPT could disrupt Duolingo's language-learning business. At the same time, rising AI computing costs are expected to lower gross margins to 69% by year-end, weighing on profitability and the stock.

    This is the main counterweight explaining why DUOL's stock has been volatile and under pressure.

  • Q2 earnings beat and accelerating user growth Duolingo beat Q2 estimates, raised its full-year EBITDA margin outlook, and later disclosed daily active user growth of 27.4% in August, suggesting momentum is speeding up. An analyst upgrade to Buy also lifted sentiment, though the broader consensus remains Hold.

    This shows the company is executing well and user growth is accelerating, which is the key driver of the stock's recent rebound.

SISB Public Company Limited (SISB.BK)

Q3 2026
▼3▲1

SISB cuts student target again as costs rise and competition bites

  • Student target cut again, revenue flat SISB lowered its 2026 student target from 4,600 to 4,400-4,500, after already cutting from 4,800. Full-year revenue is now expected to be flat and net profit may slip slightly, as enrollment grew below plan and no tuition increase was made.

    This is the latest and most concrete downgrade to growth expectations, directly weighing on the stock.

  • Costs and investment squeeze profit Q2 profit fell about 10-12% as teaching and admin costs rose faster than revenue, cutting the gross margin. Higher spending on the new school and a sports center is expected to keep profit under pressure in the fourth quarter.

    It explains the earnings decline and why profit may stay weak even if revenue stabilizes.

  • Tougher competition from new international schools Many new international schools have opened, spending heavily but enrolling fewer students than planned. SISB is focusing on the 300,000-500,000 baht tuition segment instead of the premium tier, which limits how much it can charge and grow.

    Competition is a structural force capping enrollment and pricing power, a key reason for the target cuts.

  • New school and curriculum upgrades support long-term growth SISB is building its seventh school, Marina Singapore International School in Pathum Thani, with room for 1,200 students and 30-40 applications already. It is also adding AI literacy and revamped Chinese and university counselling programs, funded by 1.8 billion baht cash and no debt.

    These investments are the main growth drivers that could offset current enrollment weakness over time.

September 2026
▼3▲1

SISB cuts student target again as costs rise and competition bites

  • Student target cut again, revenue flat SISB lowered its 2026 student target from 4,600 to 4,400-4,500, after already cutting from 4,800. Full-year revenue is now expected to be flat and net profit may slip slightly, as enrollment grew below plan and no tuition increase was made.

    This is the latest and most concrete downgrade to growth expectations, directly weighing on the stock.

  • Costs and investment squeeze profit Q2 profit fell about 10-12% as teaching and admin costs rose faster than revenue, cutting the gross margin. Higher spending on the new school and a sports center is expected to keep profit under pressure in the fourth quarter.

    It explains the earnings decline and why profit may stay weak even if revenue stabilizes.

  • Tougher competition from new international schools Many new international schools have opened, spending heavily but enrolling fewer students than planned. SISB is focusing on the 300,000-500,000 baht tuition segment instead of the premium tier, which limits how much it can charge and grow.

    Competition is a structural force capping enrollment and pricing power, a key reason for the target cuts.

  • New school and curriculum upgrades support long-term growth SISB is building its seventh school, Marina Singapore International School in Pathum Thani, with room for 1,200 students and 30-40 applications already. It is also adding AI literacy and revamped Chinese and university counselling programs, funded by 1.8 billion baht cash and no debt.

    These investments are the main growth drivers that could offset current enrollment weakness over time.

Latest
▼3▲1

SISB cuts student target again as costs rise and competition bites

  • Student target cut again, revenue flat SISB lowered its 2026 student target from 4,600 to 4,400-4,500, after already cutting from 4,800. Full-year revenue is now expected to be flat and net profit may slip slightly, as enrollment grew below plan and no tuition increase was made.

    This is the latest and most concrete downgrade to growth expectations, directly weighing on the stock.

  • Costs and investment squeeze profit Q2 profit fell about 10-12% as teaching and admin costs rose faster than revenue, cutting the gross margin. Higher spending on the new school and a sports center is expected to keep profit under pressure in the fourth quarter.

    It explains the earnings decline and why profit may stay weak even if revenue stabilizes.

  • Tougher competition from new international schools Many new international schools have opened, spending heavily but enrolling fewer students than planned. SISB is focusing on the 300,000-500,000 baht tuition segment instead of the premium tier, which limits how much it can charge and grow.

    Competition is a structural force capping enrollment and pricing power, a key reason for the target cuts.

  • New school and curriculum upgrades support long-term growth SISB is building its seventh school, Marina Singapore International School in Pathum Thani, with room for 1,200 students and 30-40 applications already. It is also adding AI literacy and revamped Chinese and university counselling programs, funded by 1.8 billion baht cash and no debt.

    These investments are the main growth drivers that could offset current enrollment weakness over time.