1/ If you want to find out what is in the Y Combinator S19 batch, @Golden has compiled (using public signals) a near complete list of truly exciting companies.

If we are missing any or you want to help improve the data you can edit the topics.

https://t.co/9QGLiEPsn3

Some people really benefit from hearing advice that everyone knows, for the same reason we keep schools open despite every subject in them having been taught before.

In that spirit, here's some quick Things Many People Find Too Obvious To Have Told You Already.

Your idea is not valuable, at all. All value is in the execution. You think you are an exception; you are not. You should not insist on an NDA to talk about it; nobody serious will engage in contract review over an idea, and this will mark you as clueless.

Technologists tend to severely underestimate the difficulty and expense of creating software, especially at companies which do not have fully staffed industry leading engineering teams ("because software is so easy there, amirite guys?")

Charge more. Charge more still. Go on.

The press is a lossy and biased compression of events in the actual world, and is singularly consumed with its own rituals, status games, and incentives. The news necessarily fails to capture almost everything which happened yesterday. What it says is important usually isn't.

Companies find it incredibly hard to reliably staff positions with hard-working generalists who operate autonomously and have high risk tolerances. This is not the modal employee, including at places which are justifiably proud of the skill/diligence/etc of their employees.

The best way to know if people like your product is NOT:

- Have a lot of emails in the waiting list
- Become #1 on PH
- Become #1 of HN or Reddit
- Have people that saing "I'll pay"
- Have a lot of free users

The best way to know if they're actually pay for it.

The only thing that matters is your product providing a value, and you can't know this until people will pay money for it.

We can have a first signal of a product/market fit after the launch by check how many sales we've got in the first 24h. Some scale:

200+ This has a high potential.
100+: This has a potential.
50+: Some people need it.
10+: People almost don't need it.
0+: People don't need it.

This is for a single time payment product. For a subscription probably it should be less because people hate subscription.

And obviously, you should have a lot of traffic like 3-5k+.

Here is a stat for my products (macOS apps) for the first 24h after the launch:

If you know me, you know I don't like broadcasting details about my personal life on this website, but I have been getting asked why I'm not doing Christmas this year so I just wanna put this whole mess to bed. First of all, I don't agree with gay marriage... (1 of 4,625)

... full of dog food and she said, "I'm pretending this is ice cream! Treat me like a baby!" and proceeded to hump her own arm and I thought, "something tells me this isn't the real Norah Jones"... (117 of 4,625)

...cost me $7,000. I had to put it on two separate credit cards! It wasn't 'til I got to my car that I realized "that's way too expensive for one onion." But I didn't have time. Amanda Seyfried was begging to change my diaper... (1,001 of 4,625)

...another Christmas miracle. Mistletoe, stockings, sleigh bells, snow! All these things I have put up my ass. The taste of coffee... (2,974 of 4,625)

...I felt a *very* cold finger on my cheek and I turned around and I said, "Grandma?" and she goes, "Surprise, I'm alive and I work at Sears!" I said, "okay"... (3,047 of 4,625)