Business thinker

Sam Altman's Startup Playbook: love, focus and momentum

Updated 4 November 2026

Not affiliated with or endorsed by Sam Altman or their companies.

Sam Altman led Y Combinator, the startup accelerator, and later became chief executive of OpenAI. His Startup Playbook, written for Y Combinator founders and published free online, says a startup needs a great idea, team, product and execution. Its sharpest points: make something a few users love rather than many like, operate with focus and intensity, and never lose momentum. His essay How To Be Successful (2019) adds long-term thinking and focus.

The idea and the people who need it

The playbook says Y Combinator asks founders what they're building and why, and looks for a clear, short answer: complex ideas are often a sign of muddled thinking. It also asks who desperately needs the product. In the best case, that's the founder; next best, someone the founder understands very well.

To test an idea, the playbook gives two routes: launch it and see what happens, which suits consumer products, or try to sell it before building, such as getting a letter of intent, which suits products for businesses.

Love, not like

The playbook calls making something users love the goal of a startup, and says it is far easier to get more users than to turn users who like a product into users who love it. One sign of love it gives: users telling their friends without the company asking them to.

Focus, intensity and momentum

Asked to sum up how to operate, the playbook picks two words: focus and intensity. The best founders it describes say no a lot, don't start the next thing until they've dominated the first, and do what they do very quickly and decisively. It names doing too many of the wrong things as a common cause of startup death.

On growth, the playbook argues that growth, as long as it isn't bought at a loss, solves most problems, and that without it, teams lose heart. It says the company does what the CEO measures, so the CEO should pick the metric and keep it in front of the team. It also lists the CEO's jobs: set the vision and strategy, evangelize, hire and manage, raise money, and set the quality bar.

In How To Be Successful, Altman lists 13 points, among them compounding yourself, focus and being hard to compete with. He suggests letting small opportunities go to pursue the ones that could be step changes.

How to apply it to your own startup

1. Write what you're building and who desperately needs it in one sentence.
2. List the evidence that users love the product, not just like it: referrals, retention, unprompted praise.
3. Say how the idea was tested: a launch, or a commitment to buy.
4. List what the team is working on, with time shares, and mark what isn't the first thing.
5. Pick one growth metric and review it weekly.
6. Check that someone is doing each of the CEO's five jobs.
7. Name one thing to stop.

What the sources say, and what they don't

Everything above comes from the Startup Playbook and How To Be Successful as published on Altman's own sites; the playbook has no date on its page, so we don't give one. We don't cover his views on artificial intelligence or OpenAI, which are outside these texts. The steps for your own startup are our summary of the playbook's advice, not his words.