Every resource founders actually use, in one library.

What founders use most, ranked by how many answers lean on it.

1. Once you suspect a spike, this guide shows you the mechanic that actually proves it: split customers into cohorts by the month... Stripe Resources Article · About a 12 minute read · Starting Up SaaS Cohort Analysis: A Guide for Businesses Stripe In 2 answers
2. This is the clearest statement of the argument you need before you touch either lever: retention is not one metric among many,... OpenView Essay · Starting Up Retention Is the King of Growth (Brian Balfour, 500 Startups talk) Brian Balfour In 2 answers
3. This is the essay that reframes the whole question. Instead of asking whether your DAU/MAU is high enough, it tells you to look... Andreessen Horowitz (a16z) Essay · Starting Up The Power User Curve: The Best Way to Understand Your Most Engaged Users Li Jin and Andrew Chen In 2 answers
4. Before you run anything, put your real numbers into this and see how many conversions per variant you would actually need. It... evanmiller.org Tool · Starting Up Sample Size Calculator (Evan's Awesome A/B Tools) Evan Miller In 2 answers
5. Torres takes the next step after you accept you cannot reach significance: figure out what you are actually trying to learn,... Product Talk Article · Starting Up What to Do When You Don't Have Enough Traffic to A/B Test Teresa Torres In 2 answers
6. This is the most direct piece we found on the founder-led versus formal-function question, and it argues hard that most early... First Round Review Article · About a 20 minute read · Starting Up You're Not Ready for a Head of Growth: Run This Founder-Led Growth Playbook Instead Matt Lerner In 2 answers
7. This is the cleanest explanation of the one idea that decides your first channel: Google captures demand that already exists,... Big Flare Article · About a 12 minute read · Starting Up Meta Ads vs Google Ads for Ecommerce: The Demand Generation vs Demand Capture Framework Daryl Mander In 2 answers
8. If full incrementality testing is more than your team can run right now, blended metrics are the honest shortcut, and this... Eightx Article · About a 10 minute read · Starting Up ROAS vs MER vs Blended CAC: Which Metric Actually Matters Matt Putra In 2 answers
9. Video · About 30 minutes · Starting Up How to Get Users and Grow Gustaf Alstromer In 2 answers
10. Video · ~15 min · Starting Up How to CRUSH Facebook Ads with a Small Budget in 2026 Ben Heath In 2 answers
11. This is Meta's own documentation on the tracking setup most founders skip and then regret: defining standard events like... Meta for Developers documentation Article · About 10 to 15 minutes to read · Starting Up Conversion Tracking (Meta Pixel Implementation) Meta for Developers In 2 answers
12. Thormeier interviews founders and operators who chose to put their own face at the top of the funnel, so you hear the lived... Apple Podcasts Podcast · Ongoing series, episodes ~30 to 60 min · Starting Up The Founder-Led Marketing Show Finn Thormeier In 2 answers
13. Video · Starting Up How I use AI to save 10+ hours per week Ali Abdaal In 2 answers
14. Arvid Kahl built and sold a SaaS, then grew a real audience of tens of thousands almost entirely online, from outside any... Apple Podcasts Podcast · Ongoing series, most episodes 20 to 40 minutes · Starting Up The Bootstrapped Founder Arvid Kahl In 2 answers
15. Once you are convinced you want an owned list, you need somewhere to actually put it, and Beehiiv is a straightforward place to... beehiiv.com Tool · Starting Up Beehiiv Beehiiv In 2 answers
16. The essay tells you why to own your audience and the tool gives you somewhere to put it, but this is the piece that covers the... Newsletter Operator Article · Starting Up The MAGIC formula that converts social followers into email subscribers J. Matthew McGarry In 2 answers
17. This is the platform a founder graduates to once a free WhatsApp or Discord group starts breaking down and they need courses,... circle.so Tool · Pricing page, quick scan · Starting Up Circle Pricing Circle In 2 answers
18. Richard Millington has spent years advising organizations on community strategy, and his core argument here is the exact... FeverBee Essay · About an 8 minute read · Starting Up The 'Community Everywhere' Era Has Arrived: Don't Waste This Opportunity Richard Millington In 2 answers
19. Spinks ran CMX and spent a decade watching what actually keeps a community alive, and his core argument is that a small slice... Wiley Book · Starting Up The Business of Belonging: How to Make Community Your Competitive Advantage David Spinks In 2 answers
20. The three People and Company founders built communities for Nike, Substack, and others, and they organize the whole book around... Stripe Press Book · ~180 pages · Starting Up Get Together: How to Build a Community With Your People Bailey Richardson, Kevin Huynh, Kai Elmer Sotto In 2 answers
21. This is the practical counterpart to the big-picture book: concrete, tested tactics for closing the gap between people clicking... Meetup Blog (Organizer Guide) Article · ~10 min read · Starting Up How To Get People to Show Up to Your Events Meetup Team In 2 answers
22. When you are planning your first few meetups, a blank page is the enemy: this gives you a ready run of show so you can slot in... Eventbrite Blog Template · Downloadable Google Doc template + guide · Starting Up Free Run of Show Template Eventbrite In 2 answers
23. Video · about 1 hour · Starting Up Mastering onboarding | Lauryn Isford (Head of Growth at Airtable) Lenny Rachitsky and Lauryn Isford In 2 answers
24. YC's David Lieb walks through cohort retention: watching each week's new users and asking how many actually come back. For a... Y Combinator Startup School Video · ~20 min · Starting Up How To Improve Cohort Retention David Lieb In 2 answers

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