They promise "free, fun, effective" learning, but their mascot literally threatens you with death memes when you skip a lesson. | They had to steal tricks from FarmVille to make people care about conjugating French verbs — that's not product-market fit, that's digital manipulation. | When your growth engine breaks, you're left with an owl making threats to teenagers.

Sources from Lenny's Newsletter and Podcast: How to win in consumer subscription (Newsletter), How Duolingo reignited user growth (Newsletter), The Subscription Value Loop: A framework for growing consumer subscription businesses (Newsletter), How to increase your product's retention (Newsletter)

They're billing themselves as purpose-built for modern teams, which is startup speak for "we couldn't compete with Jira so we added chatbots." | Linear's expensive AI-powered features risk becoming another underutilized enterprise tool that developers ignore while they go back to their trusted workflows. | You cannot cross the chasm of product-led growth because enterprise buyers need serious hand-holding, not slick AI demos that look impressive in meetings but crash when teams actually try to ship code.

Sources from Lenny's Newsletter and Podcast: Picking a wedge (Newsletter), Counterintuitive advice for building AI products (Newsletter), Geoffrey Moore on finding your beachhead, crossing the chasm, and dominating a market (Podcast)

They turned workplace chat into a notification casino where every ping is a slot machine pull. Now they want to add Slackbot AI to coordinate your work — because what busy professionals really need is a robot scheduling their existential dread. | They're charging enterprises for AI that can't think while teams average 43 apps already. Forty-three! They built a digital filing cabinet with a chatbot receptionist and called it the future of work. | Your Slackbot summary will be as useful as asking Siri to do your taxes.

Sources from Lenny's Newsletter and Podcast: What is a good activation rate (Newsletter), Counterintuitive advice for building AI products (Newsletter), How today's fastest growing B2B businesses found their first ten customers (Newsletter)

Today's victim is Notion — the AI workspace that works for you, as long as "working" means replacing forty-seven different tools with one tool that does all forty-seven things poorly. | Notion brags about penetrating 62% of Fortune 100 but conspicuously avoids mentioning their own retention rates. | Their pricing calculator shows $4,080 in annual savings, implying high price points — but they still offer a free tier and court individual users. That's the worst of both worlds: high churn from low-commitment users at enterprise price expectations.

Sources from Lenny's Newsletter and Podcast: What is good retention? (Newsletter), GTM motions of 30 B2B SaaS companies (Newsletter), How to increase your retention (Newsletter), What is good monthly churn (Newsletter)