Every resource founders actually use, in one library.

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

1. This is YC's curated shelf of talks and essays filtered to market size, so you get partner-level guidance in one place instead... Y Combinator Course · Starting Up YC Startup Library: Market Size collection Y Combinator
2. Even though your primary build should be bottom-up, you still want a top-down triangulation to check it, and this gives you a... Data-Mania Template · Starting Up Top-Down Market Sizing: Step-by-Step TAM, SAM, SOM (with Examples and Template) Data-Mania
3. A structured spreadsheet that makes you fill in the number of target customers, your unit economics, and your serviceable and... Scalepath Template · Spreadsheet · Starting Up Free Bottoms-Up TAM Template Scalepath
4. The government's live registry of registered micro, small, and medium enterprises, filterable by state, district, and activity.... Ministry of MSME, Government of India Tool · Starting Up Udyam Registration Real Time Dashboard Ministry of MSME, Government of India
5. Downloadable district level datasets of registered enterprises you can filter and count yourself. Where the dashboard shows... data.gov.in Tool · Starting Up Udyam MSME Registered Units (Open Data) data.gov.in
6. Your short answer says to read the earnings calls and annual reports of public companies near your space for real numbers, and... U.S. Securities and Exchange Commission Tool · Starting Up SEC EDGAR Full-Text Search SEC
7. A ready structure for capturing notes across your 20 conversations so patterns actually surface instead of blurring together.... Notion Template · reusable templates · Starting Up Customer Discovery Interview Templates Notion
8. A large nonprofit network of women and nonbinary investors and founders that runs Female Founder Office Hours, giving you real... All Raise Tool · Community / program · Starting Up All Raise (Female Founder Office Hours) All Raise
9. YC's curated shelf of talks and essays filtered to women founders, spanning fundraising, self doubt, and building. It is a... Y Combinator Course · Curated collection · Starting Up YC Startup Library: Women Founders Y Combinator
10. A ready structure for running the customer conversations that prove or disprove your fit, built on The Mom Test rules. Since... Mari Luukkainen (Gumroad) Template · Notion template · Starting Up The Mom Test Customer Interview (Notion template) Mari Luukkainen
11. When a buyer says yes, you want a clean, standard agreement ready so the pilot becomes signed proof fast. This free,... Common Paper Template · 2 page template · Starting Up Design Partner Agreement (Free Template) Common Paper
12. A subscription publication that reports one deep story a day on Indian startups, tech, and consumer companies. When a trend is... The Ken Tool · Starting Up The Ken The Ken
13. The developer forum where a lot of new tools and shifts get discussed before they reach the mainstream tech press. Reading it... Y Combinator Tool · Starting Up Hacker News Y Combinator
14. Course · ~6.5 hours · Starting Up Making Friends with Machine Learning (full course) Cassie Kozyrkov
15. The account aggregator framework lets a person share verified financial data with consent, and Sahamati is the ecosystem hub... Sahamati Tool · Starting Up Sahamati (Account Aggregator ecosystem) Sahamati
16. A crowdsourced list of over a hundred directories and communities where you can list or relaunch a product, useful as a... Indie Hackers Template · Starting Up Relaunch like a pro: 100+ places to launch, relaunch, and list your product Indie Hackers community
17. This compact guide gives you rules for writing plain, persuasive prose that you can apply the same afternoon: sentence length,... Julian Shapiro Course · Starting Up Writing Well Julian Shapiro
18. This is a practical swipe file for the one line that decides whether anyone reads your launch post at all, built around... Copyhackers Template · Starting Up 65 Headline Formulas Copyhackers
19. Buffer's live public hub, real revenue, real decisions, real posts, is a working example of what a company sounds like when it... Buffer Tool · Starting Up Buffer Open Buffer
20. This gives you the actual email skeletons, teaser, launch day, update, follow-up, that map directly onto the five-beat sequence... HubSpot Blog Template · 10 min read · Starting Up How to Create a Product Launch Email [Outlines + Templates] HubSpot
21. Ship is a landing page and waitlist tool built specifically for the pre-launch teaser stage of a campaign like the one in the... Product Hunt Tool · Starting Up Ship by Product Hunt: A toolkit for makers to ship awesome products Product Hunt
22. Justin Jackson built this course specifically for technical founders who are good at shipping but go quiet on marketing right... justinjackson.ca Course · self-paced course · Starting Up Marketing for Developers Justin Jackson
23. Our answer's second half is about treating sales as a repeatable pipeline, not one-off calls, and that needs somewhere to write... HubSpot Tool · Starting Up HubSpot Pipeline Management HubSpot
24. When you need the actual words for the same-day recap email, this gives you five ready structures for different types of calls,... HubSpot Template · 8 min read · Starting Up 5 Recap Email Templates to Use After Connect, Discovery, and Demo Calls HubSpot

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