Explore · The library
Every resource founders actually use, in one library.
The essays, videos, podcasts, books and tools behind every answer across eChai's hubs, from starting up to go-to-market, D2C, founder money and AI, each with a note on why it is here.
What founders use most, ranked by how many answers lean on it.
- A first hand engineering account of why Flipkart, an app first Indian company, rebuilt the mobile web to reach users on weak... Medium (Progressive Web Apps) Article · Starting Up Building Flipkart Lite: A Progressive Web App Aditya Punjani In 2 answers
- Chen lays out the clearest early signal that people actually value your product: do cohorts keep coming back over time. He... andrewchen.com Essay · Medium read · Starting Up How to measure if users love your product using cohorts and revisit rates Andrew Chen In 2 answers
- A short, opinionated guide to tracking the events that actually matter, your growth events like signup, activation, and... PostHog Docs Article · Short read · Starting Up Product analytics best practices PostHog Docs In 2 answers
- A tracking plan is the single document that keeps your analytics from rotting into noise. This guide shows how to define events... Amplitude Blog Article · Long read · Starting Up How to create a tracking plan Amplitude Blog In 2 answers
- Chen names the hard side of the network, the users who create most of the value and are hardest to win, and shows how to reach... Andrew Chen Book · ~368 pages · Starting Up The Cold Start Problem Andrew Chen In 2 answers
- Often the urge to rebuild comes from one abstraction that no longer fits, not from the whole codebase. Metz explains why a... sandimetz.com Essay · 8 min read · Starting Up The Wrong Abstraction Sandi Metz In 2 answers
- This is the practical manual for improving code you are afraid to touch, without a rewrite. Feathers gives you techniques to... Prentice Hall (Robert C. Martin Series) Book · 456 pages · Starting Up Working Effectively with Legacy Code Michael C. Feathers In 2 answers
- Beck argues for small, cheap tidyings over grand restructurings, and gives you a way to reason about when cleanup is worth it.... O'Reilly Media (Kent Beck) Book · 120 pages · Starting Up Tidy First? A Personal Exercise in Empirical Software Design Kent Beck In 2 answers
- The canonical case that you can reshape a system in safe, small steps rather than one dramatic rewrite. Fowler shows how to... martinfowler.com Book · 448 pages · Starting Up Refactoring: Improving the Design of Existing Code (2nd Edition) Martin Fowler In 2 answers
- A two minute read that reframes the whole copying question. Sivers puts numbers on it: a brilliant idea with no execution is... Derek Sivers (sive.rs) Essay · ~3 min read · Starting Up Ideas are just a multiplier of execution Derek Sivers In 2 answers
- This is the open-source-as-growth playbook told by a founder who lived it, aimed at products where developers are the users.... PostHog Article · ~15 min read · Starting Up How we got our first 1,000 users James Hawkins In 2 answers
- A balanced walkthrough of when building in public helps and when staying quiet is smarter, without pushing you either way. It... Mercury Article · ~10 min read · Starting Up Building in public: Is this the right approach for your startup? Mercury In 2 answers
- An honest breakdown of what a no-code MVP actually costs once you add hosting, tool subscriptions, and paid tiers, so the... Ptolemay Article · ~10 min read · Starting Up The real cost of no-code MVPs Ptolemay In 2 answers
- Chen frames the exact trap you are in: pouring signups into a bucket that leaks, where more acquisition just wastes more water.... Andrew Chen Essay · 10 min read · Starting Up Is Your Website a Leaky Bucket? 4 Scenarios for User Retention Andrew Chen In 2 answers
- A single average retention number hides whether you have a small core of people who love the product, which is the seed you... Andrew Chen Essay · 12 min read · Starting Up The Power User Curve Andrew Chen In 2 answers
- If your diagnosis points at onboarding, this is the deepest single piece on fixing it, from the growth lead behind Pinterest... Casey Winters (Casey Accidental) Essay · 15 min read · Starting Up Why Onboarding is the Most Crucial Part of Your Growth Strategy Casey Winters In 2 answers
- A structured, play-by-play guide from a founder who hit the non-technical wall herself, then learned to build with no-code. It... Practical Inspiration Publishing Book · ~250 pages · Starting Up The No-Code Startup: The Complete Guide to Building Apps Without Code Emma Reilly In 2 answers
- Many founders fear that no-code will make them look unserious to investors, and this piece tackles that head on. It gives you... Bubble Article · ~10 min read · Starting Up How to Explain Your No-Code Tech Stack to Investors Bubble In 2 answers
- A hands on comparison where the author builds the same app across the major AI builders and reports what each one is actually... Aakash Gupta (Product Growth) Article · 30 min read · Starting Up Best AI Prototyping Tools 2026: Lovable vs Bolt vs Replit vs v0 Aakash Gupta In 2 answers
- A neutral, citation backed overview when you want the definition, the short history and the honest criticisms in one place,... Wikipedia Article · 10 min read · Starting Up Vibe coding (overview) Wikipedia In 2 answers
- The official government press release on the notified Rules, so this is the primary source to cite when a lawyer, investor, or... Press Information Bureau, Government of India Article · Starting Up Digital Personal Data Protection Rules, 2025 (Official Notification) Government of India In 2 answers
- A nine-step, screenshot-led tutorial for the exact directory use case in your answer. It covers connecting Airtable, picking a... andrewmurrayhq.com Article · 20 min read · Starting Up How to build a no-code directory with Softr and Airtable Andrew Murray In 2 answers
- This lays out when accumulated shortcuts actually start slowing a growing company down, versus when they are just cosmetic. It... martinfowler.com Article · 20 min read · Starting Up Bottlenecks of Scaleups: Tech Debt Tim Cochran and Carl Nygard In 2 answers
- If you want to understand why a font pairing works rather than just copying one, this is the clearest primer, straight from the... Google Fonts Knowledge Article · 12 min read · Starting Up Pairing Typefaces Google Fonts In 2 answers
The hubs
Starting Up
Find an idea, validate it, build, and land your first customers.
GTM
Go-to-market, from breaking in to how the best teams do it.
D2C
Building a direct-to-consumer brand, India-first.
Wealth
Paying yourself, ESOPs, secondaries, and de-risking founder wealth.
How Founders Use AI
How founders actually put AI to work, mapped topic by topic.
Glossary
Plain-language definitions of the startup and VC terms you'll hit.
eChai Partner Brands
The partnership →