Every resource founders actually use, in one library.

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

1. This entry frames the Wizard of Oz test as one experiment in a wider validation toolkit, with clear guidance on cost, evidence... Kromatic (The Real Startup Book) Template · Starting Up Wizard of Oz (The Real Startup Book) Kromatic (The Real Startup Book)
2. A ready to use script for interviewing a recent customer about why they switched, built entirely around past behaviour and... Deploy Empathy Template · script · Starting Up Customer Interview Script Template: The JTBD Switch Interview Michele Hansen
3. A ready made four question survey for finding the price range your customers see as fair, including the point where "too cheap"... Contentsquare Template · Starting Up Van Westendorp Price Sensitivity Survey Template Contentsquare
4. Talking to prospects only pays off if you capture what you hear in a way you can act on. This free Google Doc gives you a... Kromatic Template · Google Doc template · Starting Up Customer Discovery Note-Taking Template Kromatic
5. If your customers run their business on WhatsApp, being reachable there yourself is the point. The free Business app gives you... Meta / WhatsApp (Google Play) Tool · Free app · Starting Up WhatsApp Business app WhatsApp
6. Your short answer says give people a simple way to pay, and for Indian founders this is one of the fastest: create a payment... Razorpay Tool · Starting Up Razorpay Payment Links Razorpay
7. The Kano model gives you a simple way to sort features into must-haves, performance features, and delighters, so you can see... Folding Burritos (Daniel Zacarias) Tool · ~30 min read · Starting Up The Complete Guide to the Kano Model Daniel Zacarias
8. This is the concrete proof that payments are a solved problem you should borrow: a few steps and you are charging real cards... Stripe Documentation Tool · Docs plus setup · Starting Up Accept a payment Stripe
9. If your MVP is really about testing willingness to pay, you may not need to write payment code at all: a Payment Link is a URL... Stripe Documentation Tool · Docs plus setup · Starting Up No-code options for using Stripe (Payment Links) Stripe
10. For an Indian MVP, this is usually the right payments choice because it supports UPI, cards, net banking, and wallets out of... Razorpay Documentation Tool · Docs plus setup · Starting Up Razorpay Quickstart Guide Razorpay
11. Clerk gives you prebuilt sign up, sign in, and profile screens, so the whole login surface arrives finished rather than... Clerk Documentation Tool · Docs plus setup · Starting Up Clerk Quickstart Clerk
12. Firebase Auth is the battle tested default for mobile first and Google Cloud based apps, with a very generous free tier. It... Firebase Documentation Tool · Docs plus setup · Starting Up Firebase Authentication Google
13. Supabase pairs auth with a Postgres database, so if your app is data heavy you get login and storage from one open source stack... Supabase Documentation Tool · Docs plus setup · Starting Up Supabase Auth Supabase
14. Sending reliable email (verification, password resets, notifications) is its own deliverability problem, and Resend lets you... Resend Tool · Docs plus setup · Starting Up Resend Documentation Resend
15. If you decide the mobile web is your path, this free course teaches how to make it installable, work offline, and feel app like... web.dev (Google) Course · Starting Up Learn PWA web.dev (Google)
16. A roundup of free tracking plan templates from Segment, Mixpanel, Amplitude, and others, so you do not start from a blank page.... Avo Template · Short read plus templates · Starting Up 9 Free Tracking Plan Templates from Mixpanel, Amplitude, Segment, and More Avo
17. The other product analytics tool named in our short answer, strong for event based funnels and retention once you know the... Mixpanel Tool · Starting Up Mixpanel Mixpanel
18. A maker community built around shipping in public where every post is a completed to-do, so it turns building in public into an... WIP (wip.co) Tool · ongoing · Starting Up WIP Marc Kohlbrugge
19. Free, well-produced lessons that take you from nothing to a real, responsive site and CMS-driven pages on Webflow, one of the... Webflow University Course · Self-paced · Starting Up Webflow University Webflow
20. When you hit the complexity your short answer warns about (real permissions, data models, backend logic), this is the... No Code MBA Course · Multi lesson track · Starting Up The Complete Guide to Bubble No Code MBA
21. The official, primary source walkthrough for going from an idea to a deployed app inside one AI builder. Because it is the tool... Replit Docs Course · Self paced · Starting Up Vibe Coding 101 Replit Docs
22. Setu is NPCI-certified and built for UPI-first collection, including deep links and mandates, which suits India-only products... Setu Tool · Starting Up UPI APIs for Seamless Payments Setu
23. The primary pricing page, so you can budget honestly before committing. Plans are billed in USD, so factor in forex on your... Bubble Tool · Starting Up Bubble Pricing Bubble
24. This is the tool your short answer names, straight from the source. Glide reads the headers of your Google Sheet and generates... Glide Tool · Sign up and build in an afternoon · Starting Up Glide: Build custom no-code apps with Google Sheets Glide

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