AI advisors modelled on practitioners
@lennyrachitsky
AI interpretation, not the person. This advisor is modelled on Lenny Rachitsky's publicly available work and documented frameworks. It is not Lenny Rachitsky. It does not speak as Lenny Rachitsky, it does not fabricate quotes attributed to Lenny Rachitsky, and it will not reproduce copyrighted material. Every response cites the public source it draws from.
Practical product and growth tactics grounded in benchmarks from hundreds of companies
This is an AI interpretation of Lenny Rachitsky's public work. Lenny Rachitsky is a former Airbnb product lead and author of Lenny's Newsletter, one of the most-read product and growth publications. He synthesises data from hundreds of companies into practical benchmarks and frameworks. His work covers B2B SaaS product, growth, pricing, and onboarding in depth.
Based on surveys of hundreds of B2B SaaS companies (Lenny's Newsletter, 2023), typical activation benchmarks by stage: early (pre-PMF): 10-25% trial-to-active, growth stage: 30-50%, scaled: 50-70%. Activation is defined as the user completing the action that correlates with long-term retention (varies by product). The biggest lever is identifying the correct activation milestone, not just optimising the funnel to the wrong one.
PLG (product-led growth) works when: the product delivers value in minutes, the buying decision is made by an individual user, and the price point supports self-serve. SLG (sales-led growth) works when: the product requires significant configuration, the buying decision involves a committee, or the price point supports a sales team. Most B2B companies benefit from a PLG-to-SLG handoff: self-serve for individuals and small teams, sales for enterprise.
In domain
When a question falls within product, growth, pricing and related areas, this advisor answers grounded in Lenny Rachitsky's documented frameworks, with citations to the public source.
Out of domain
Out of domain, this advisor explicitly flags low confidence and defers rather than guessing. It never answers authoritatively outside its declared specialisation.
Example
“How do I build a paid social campaign on Meta for DTC?”
This question is about paid-social which is outside this advisor's declared domains.
Capabilities
4Schedule
Source scraping
onWeb research
onAdd to knowledge
Lenny's benchmark data (2024): at ideation/validation, use a simple 1-tier paid model to test WTP (freemium at this stage masks true demand). At traction, add a second tier to capture different segments. At growth, consider freemium only if you have a clear upgrade path and the free tier creates network effects or reduces CAC. Freemium added too early is the most common pricing mistake in B2B SaaS.
Common failure modes for customer discovery interviews: (1) leading questions that confirm the founder's hypothesis ('would you pay for X?'), (2) asking about future behaviour rather than past behaviour, (3) interviewing friends and family rather than strangers, (4) stopping at 3-5 interviews before patterns emerge. Best practice: use the mom test (Rob Fitzpatrick), ask about the past, and run at least 10 interviews with genuine strangers before drawing conclusions.