A Few Customers Who Love You Beat a Crowd Who Likes You
Loyal users spread the word on their own, while lukewarm approval stalls, startup investor Sam Altman argues.

YC Root Access · Lecture 1 - How to Start a Startup (Sam Altman, Dustin Moskovitz)Sam Altman, the investor teaching Stanford students how to start a company, had just narrowed their early job to two tasks, building the product and talking to users. Then he gave them a rule he said they say a lot at YC.
It is better, he said, “to build something that a small number of users love than a large number of users like.”
Altman argued that founders almost always face that tradeoff. In the best of all worlds, he said, you would launch “something that a lot of people really love,” but in practice you usually cannot because if there is “an opportunity like that Google or Facebook will do it so.” So a new company can either spread a little approval widely or concentrate intense devotion narrowly, and he described it as a law of conservation of happiness for a first product.
He believes the second choice is the one that is easier to grow from. It is much easier, he said, to expand from something a few people love into something many people love than to turn widespread lukewarm approval into love. “If you get this right you can get a lot of other things wrong,” he said, but if you miss it you can do everything else right and still fail.
The test, Altman said, is whether growth happens by word of mouth, for office software as well as for consumer apps. When people really love something, he said, they tell friends and it spreads on its own. If founders instead explain that slow growth is fine because a big partnership will save them, he said, it is, in his view, nearly always a warning of deep difficulty.
Selling and advertising matter later, he added, but “a great product is the secret to long-term growth hacking.” “Very few startups die from competition,” he said. Most die because they never made something users loved.
Questions people ask
How can a founder tell the difference between love and like?
Love usually means users choose you without being persuaded, return on their own, and recruit friends. Altman pointed to word of mouth and retention, not signups, as the clues. Other practical signs are complaints if you disappeared, and willingness to pay or to tolerate rough edges.
Does this apply to products sold to businesses, not just consumers?
Yes. Altman said the word of mouth test works for office software as well as consumer apps. In business sales, a team that loves a tool pushes it to colleagues and other departments, which creates the same kind of organic spread.
If users only like a product, how do you turn that into love?
He advised starting simpler than your smallest idea, then using constant feedback to improve. Ask what users would pay for, watch whether they keep using it, and make it a little better every week. Small, fanatical attention to details, writing, and support helps turn satisfaction into devotion.