Aaron Epstein
General Partner, Y Combinator · 11 appearances on the record.
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Aaron Epstein is a General Partner at Y Combinator and the co-founder and former CEO of Creative Market. At YC, he advises founders on product design, business models, and AI tools, while regularly hosting YC media series such as Design Review.
61statements → 11claims → 1claims resolved → 3.65/5average certainty → 1.65/5average debate potential → 1said about them ↓
1 supported 0 partly supported 0 contradicted 1 not checkable as stated how the 11 claims stand · each chip opens the sources
1 prediction · 10 assertions · 2 opinions · 47 insights · 1 disclosure · every statement was checked. The prediction and assertions are the 11 claims: statements the public record can support or contradict. 10 are resolved, and 1 names no date, number or outcome precise enough to check. Everything else (opinions, insights, what ifs, disclosures) can never be settled by the record, so it carries no assessment.
The record, in short
What the tape says about how Aaron argues and how the claims held up. Everything they said, and everything said about them, is in the tabs below.
Everything Aaron Epstein said on the Y Combinator Startup Podcast that made the record, most notable first. Filter by type, assessment or year in the ledger →
Epstein: Poor demo design signals a YC applicant didn't try
“Especially as we're reviewing YC applications, if you look at a demo and that demo does not have a base level of quality design, it seems like the person just didn't even try because it's so easy to do it now.”
Epstein: Avoid ad models unless expecting top-10 global website scale
“You should not use ads as your primary business model unless you expect to be a top 10 site on the internet. Otherwise, it's too hard to monetize and build a huge scale to become a massive company.”
Epstein: Platform-dependent startups face structural risk of being shut down
“If your business is built on top of another big successful platform, and your business starts to work, then it's actually in the interest of that platform To shut you down and capture all of that revenue for themselves. So that's why even if these look like th…”
Epstein: Generic AI website designs undermine startup product credibility
“And for any, anybody else in the audience, like, you lose a little bit of credibility, I think, you know, when your customers are viewing your product and they're saying like,
Eh, this looks like a bunch of other things I've seen.
They probably just use AI to …”
Epstein: Blanket '10x' startup landing page metrics feel fabricated
“It's all, everything 10 x just feels made up.”
Epstein: AI tools generate gratuitous motion effects humans wouldn't build
“Even the little bits of motion here is the kind of thing that like AI will just give you that for free and you're like, yeah, okay, let's go with that. But you would never create yourself.”
Epstein: Founders should define branding before prompting AI web design tools
“It's very easy using the same tools that everybody else is using to end up in the same place. You have to be intentional about ending up in a different place. And so rather than start from What does the AI spit out? And then let's tweak that. I would start fro…”
Epstein: Assume Visitors Skip Subheadlines Unless Headlines Intrigue Them
“What most people do is they come down and they're going to read the headlines. They're going to say, okay, what our customers say, compliance, investors, choose your plan. Like you got to be explicit and assume people are not going to read the subheadline. The…”
Epstein: UnReal Milk missed an opportunity aligning packaging with playful branding
“The website is very fun and playful, and the bottle is not. So I think there's a missed opportunity to communicate that there.”
Epstein: Canvas interfaces will be the standard AI agent UI by 2035
“10 years from now, this may be the standard to interact and control and monitor a lot of these agents. If they're truly everywhere and doing, you know, so much of the work that we as humans don't want to spend our time doing, this is going to be the way that w…”
Epstein: Text-heavy code screenshots compete visually with landing page copy
“I think one of the tricky things is it seems like part of the product here is code and logs, which have a lot of text in them. And when you try to show that in screenshots, it competes with the actual text that you're trying to communicate what's happening.”
Epstein: The best landing page headlines come directly from user descriptions
“I think a great way to figure out what should be your headline is to just ask your users, like, how would you describe our product? Because chances are the way your users think about your product and would describe it is the way that other users potentially wo…”
Epstein: Founders Must Write Cold Emails Manually Before Automating
“And you should plan to start this writing these emails manually and personalized, doing it yourself, not starting with automation. You have to do it manually first so that you can learn and figure out what works so that you can then start to scale the process …”
Epstein: Cold Email Conversion Rates Inevitably Decline at Scale
“But one thing that's important to note is that conversion rates will decrease as you scale. So if you're starting out in the early days and you're writing these emails manually and you're not getting good conversion rates, then that's something you should fix …”
Epstein: Cold email is generally a better outreach channel than LinkedIn
“I found that the ideal channels to contact are email is usually better. LinkedIn is usually worse.”
Epstein: Targeting uncommon commonalities maximizes cold outreach conversion
“You want to try to find the uncommon commonalities with the people that you're reaching out to. Now, uncommon commonalities are things that you have uniquely in common with somebody else. Things that are not obvious to have in common with other people... You h…”
Epstein: Copying user phrasing is the best language for sales outreach
“The language that your users use to describe you is almost certainly the same language that's going to resonate with other people just like them.”
Epstein: Cold emails should never explain how contact information was found
“You don't need to tell somebody how you found their contact information. That's relevant to you, not relevant to them.”
Epstein: Cold emails perform far better from founders than from sales reps
“You, the founder, should be sending these. People are going to take them way more seriously when it comes from the founders or the CEO Much more so than if it comes from some account executive or some intern or some other automated process that you set up here…”
Epstein: Founders beat large competitors by offering unmatched personal commitment
“What middle manager is going to give out their personal cell phone number when trying to win a customer's business? Like nobody's going to. And so if you make people feel like you care about them and you're going to stop at nothing and your personal career dep…”
Epstein: Founders should copy proven business models for billion-dollar companies
“There are actually only a handful of business models that are responsible for nearly all billion dollar companies. And rather than trying to reinvent the wheel, you should actually just copy one of these.”
Epstein: Nearly every billion-dollar company uses one of nine business models
“Nearly every billion dollar company is one of these nine business models.”
Epstein: Early-stage startups should focus exclusively on a single business model
“However, for your purposes, as an early stage startup, you should just have a single business model that you're focused on.”
Epstein: Marketplaces are the business model most likely to be winner-take-all
“The interesting takeaway here is that marketplaces are most likely to build winner-take-all companies. They tend to become so big and dominant in their industry that it doesn't leave much room or market share for other competitors once marketplaces actually ge…”
The other half of the tape: Aaron Epstein's own voice is left out of every number here. Other people bring the name up 1 time in 1 episode on the Y Combinator Startup Podcast. every mention, with the transcript →
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2024 1 mention in 1 episode
Appearances (11)
| Episode | Date | Speaking time |
|---|---|---|
| How Stripe Built Their New Website · Y Combinator | Apr 22, 2026 | 6m |
| Common Mistakes With Vibe Coded Websites · Y Combinator | Mar 6, 2026 | 16m |
| Inside The Startup Building Reusable Rockets · Y Combinator | Jan 8, 2026 | 3m |
| Cursor Head of Design Roasts Startup Websites · Y Combinator | Nov 20, 2025 | 15m |
| Brand Design Tips From Linear Founder Karri Saarinen · Y Combinator | Jul 25, 2025 | 14m |
| What Founders Can Do To Improve Their Design Game · Y Combinator | Mar 28, 2025 | 4m |
| AI Interfaces Of The Future | Design Review · Y Combinator | Feb 27, 2025 | 17m |
| Why Design Matters: Lessons from Stripe, Lyft and Airbnb · Y Combinator | Oct 16, 2024 | 5m |
| Stripe Head of Design Katie Dill Reviews Startup Websites · Y Combinator | Oct 1, 2024 | 6m |
| Why Startup Founders Should Launch Companies Sooner Than They Think · Y Combinator | Jul 12, 2024 | 3m |
| Critiquing Startup Websites With Webflow CEO · Y Combinator | Dec 23, 2022 | 11m |
Played on the show (3)
Episodes where a recording of Aaron Epstein was played rather than Aaron taking part, or where the tape carries an address with nobody putting questions to them. Listed because the words are on the record, kept out of every score on this page because they were not said on this show. We read this off the tape: who was spoken to, who was asked something, who answered whom.
| Episode | Date | On tape | What it is |
|---|---|---|---|
| How To Convert Customers With Cold Emails | Startup School · Y Combinator | Sep 12, 2024 | 29m | aired address |
| Startup Experts Discuss Doing Things That Don't Scale · Y Combinator | May 30, 2024 | 1m | clip played |
| Startup Business Models and Pricing | Startup School · Y Combinator | Dec 15, 2022 | 29m | aired address |