Aaron Epstein Profile Banner
Aaron Epstein Profile
Aaron Epstein

@aaron_epstein

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Group Partner @YCombinator . Previously co-founder @CreativeMarket .

San Francisco
Joined April 2009
Don't wanna be here? Send us removal request.
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@aaron_epstein
Aaron Epstein
16 days
I've reviewed hundreds of cold emails, and honestly most of them are terrible. Here's everything I've learned about how to write cold emails that actually convert.
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@aaron_epstein
Aaron Epstein
4 years
Super excited to start my new role as Partner at @ycombinator , to pay it forward to the next generation of founders the same way YC changed my life 10 years ago.
@ycombinator
Y Combinator
4 years
We’re excited to welcome @aaron_epstein to the YC Team, and welcome back @harjtaggar !
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@aaron_epstein
Aaron Epstein
4 years
The upcoming @ycombinator batch will be fully remote. And we’re still accepting late applications if you’ve always wanted to do YC but couldn’t move out to the bay area. Now’s your chance!
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@aaron_epstein
Aaron Epstein
4 years
The next @ycombinator W21 batch will be remote, so if you’ve ever considered applying but couldn’t move to the bay area during the batch, now’s the perfect time do it.
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@aaron_epstein
Aaron Epstein
10 years
Startup ideas: think about the products & services you pay for but don't love. Now build a product so good you'd tell all your friends.
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@aaron_epstein
Aaron Epstein
2 months
Full house for @paulg and @jesslivingston
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@aaron_epstein
Aaron Epstein
26 days
Charlie and Jackson build so fast you’d think they’re a team of 10 stacked engineers, rather than just 2 cofounders. Melty’s going to give every engineer their superpowers.
@charliebholtz
Charlie Holtz
26 days
I started a company! Introducing Melty, an open source AI code editor for 10x engineers. It's the first editor that understands what you’re doing from the terminal to GitHub and collaborates with you to write production-ready code.
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@aaron_epstein
Aaron Epstein
1 year
It’s never too early to apply to YC. 52% of the latest batch were accepted with only an idea, and 77% had zero revenue. Application deadline for the next batch is Friday, so apply now:
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@aaron_epstein
Aaron Epstein
5 years
Excited to kick off @YCombinator S19 Demo Day! Congrats to all the founders in the batch for all their hard work.
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@aaron_epstein
Aaron Epstein
11 months
Another unfair advantage for YC companies.
@ycombinator
Y Combinator
11 months
Today we're announcing our partnership with @Microsoft to give our AI startups Azure credits and priority access to a cluster of ND A100 Azure VMs configured for model training and fine tuning.
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@aaron_epstein
Aaron Epstein
2 years
Why we bet on founders over ideas.
@FarzaTV
Farza 🇵🇰🇺🇸
2 years
Here's my YC application vid from 2019. This is the idea that got accepted! Kinda crazy how the thing I'm talking about in this video pivoted into the wildly different thing we're working on today... Never get too attached to specific ideas. Keep iterating.
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@aaron_epstein
Aaron Epstein
1 year
14 years ago I couldn't imagine that filling out a simple form on the internet would change the course of my life. Tomorrow's the deadline for the next YC batch, so if you're thinking of filling out that same form – just do it. No downside, and it might change your life too.
@ycombinator
Y Combinator
1 year
At YC, we work with founders throughout the life of their startup and beyond, to build the world-changing companies of the future. And we'd love to work with you. The deadline to apply for YC W24 is this Friday, Oct 13 at 8pm PDT — apply today at .
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@aaron_epstein
Aaron Epstein
4 years
No better choice to join the @reddit board than @mwseibel . I’ve learned a ton from his leadership, and seen firsthand how hard he works to support black and underrepresented communities.
@verge
The Verge
4 years
Reddit names Y Combinator CEO Michael Seibel as Alexis Ohanian’s replacement
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@aaron_epstein
Aaron Epstein
3 years
About to go live for day 1 of @ycombinator Demo Day! Congrats to the entire S21 batch on all of the hard work, excited for you to share your startups with the world.
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@aaron_epstein
Aaron Epstein
4 years
Super excited for the return of live @ycombinator demo day today! Congrats to all the founders on their hard work to get to this point, can’t wait for you to share your companies with the world.
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@aaron_epstein
Aaron Epstein
2 months
“To sell, don’t act like a salesperson. Instead, be curious, be skeptical (most people don’t buy), and be human.”
@ryanRneu
Ryan Neu
2 months
Technical founders and early-career salespeople often think they must act like a salesperson to sell. The opposite is true. To sell, founders must act like humans — not salespeople. This starts with how you ask questions. Salesperson: What goals are you hoping to achieve with
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@aaron_epstein
Aaron Epstein
4 years
Congrats to the entire @ycombinator W21 batch on all the hard work, today is your day!
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@aaron_epstein
Aaron Epstein
4 years
Did not have “YC shoutout from Kanye” on my 2020 bingo card.
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@aaron_epstein
Aaron Epstein
1 month
How cool would it be to be part of the first ever YC Fall batch? Deadline is tomorrow at 8pm PT:
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@aaron_epstein
Aaron Epstein
5 months
Pretty crazy that 15 years ago I filled out a simple form on the internet, and it changed my life. Tomorrow’s the deadline to apply to the YC S24 batch, and it could change your life too. Apply now:
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@aaron_epstein
Aaron Epstein
1 year
Congrats to all of the founders presenting at the S23 Demo Day today and tomorrow! What a strong batch, excited for you to share your companies with the world.
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@aaron_epstein
Aaron Epstein
4 years
Tomorrow's the deadline to apply for the next @ycombinator batch, so if you’re on the fence…you should definitely apply! Even just filling out the application can be really helpful as you think through your business.
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@aaron_epstein
Aaron Epstein
6 years
1/ As a first-time founder with no management experience, I had to quickly learn on the job how to build an effective team. So here’s some advice that I wish someone had given me when I was just beginning to grow and manage a team at @CreativeMarket ...
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@aaron_epstein
Aaron Epstein
1 year
Designers, come work with me at YC! If you love design and helping founders, this is a rare opportunity to shape products used by the very best founders in the world.
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@aaron_epstein
Aaron Epstein
2 months
Apply now to be part of the first ever YC Fall batch! Applications due by Aug 27th, and batch kicks off Sept 29th.
@ycombinator
Y Combinator
2 months
We are running a new YC batch this fall! Applications are now open:
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@aaron_epstein
Aaron Epstein
1 month
“Authenticity sells. Being a startup is your superpower. Embrace your size, stage, and story — even if you’re just starting out.”
@ryanRneu
Ryan Neu
1 month
In the early days, founders often feel they need to act bigger than they are, thinking that’s the only way to land big deals. I made that mistake when we started @VendrHQ . Instead of pretending to be a bigger company, embrace the garage phase. I call it "take-a-shot sales" —
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@aaron_epstein
Aaron Epstein
8 years
@motherfuton that’s Microsoft levels of embarrassing…
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@aaron_epstein
Aaron Epstein
3 years
Really proud of the @ycombinator W22 batch! Excited for them to show the world their companies today.
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@aaron_epstein
Aaron Epstein
2 months
My daughter loves talking to Genie and making up stories together. If you have kids, see if they like it – makes bedtime a lot more fun!
@bubs
Bubs (Darius Monsef)
2 months
🧞🚀 is on @ycombinator 's Launch YC! Genie - The best AI sidekick for kids.
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@aaron_epstein
Aaron Epstein
8 years
The Trump EO goes against everything we stand for at @CreativeMarket . We believe in creating opportunity, not closing doors.
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@aaron_epstein
Aaron Epstein
3 years
Pretty exciting news from YC: we now invest $500k into every company in the batch! If you’ve ever been on the fence about applying before, it’s a total no brainer now.
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@aaron_epstein
Aaron Epstein
8 years
4 years ago today we opened the doors to @CreativeMarket ! What an amazing adventure it’s been.
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@aaron_epstein
Aaron Epstein
1 year
This is fun – try a mock YC interview with AI me:
@vocodehq
vocode
1 year
‼️ Introducing 🤯 Conduct a mock YC interview entirely done via AI Built with @vocodehq , voice cloning provided by @play_ht , recognition via @AssemblyAI and of course, hosted on @Replit ! Check out our repo for more info:
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@aaron_epstein
Aaron Epstein
8 years
Just crossed 2,000,000 members on @CreativeMarket ! Took us 2.5 years to get to 1M, and less than a year to hit 2M.
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@aaron_epstein
Aaron Epstein
3 years
Tonight’s the deadline to apply for the next YC batch! We’re now investing $500k in each company, so there’s no better time to apply:
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@aaron_epstein
Aaron Epstein
1 year
Spot on. And another positive pattern of successful second time founders I’ve seen is optimizing for revenue-per-employee in their next startup. They’re burned out on big inefficient teams, and want to do it again with a much leaner team.
@snowmaker
Jared Friedman
1 year
Talking to second time founders (especially v. successful ones), I've realized they tend to make the same mistakes. In fact, I made these myself in my brief attempt to start a second company after Scribd. The three most common ones:
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@aaron_epstein
Aaron Epstein
7 years
Passed 4,000,000 members on @CreativeMarket ! If this community were a country, we’d be the 133rd largest in the world 🌎
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@aaron_epstein
Aaron Epstein
6 years
Live from @ycombinator Demo Day in SF!
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@aaron_epstein
Aaron Epstein
11 months
Just released a new episode of Design Review! YC Group Partner (and former @Optimizely co-founder) @koomen joined me to review website conversion flows, and share tips to improve conversion rates. Give it a watch:
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@aaron_epstein
Aaron Epstein
6 months
Excited for W24 Demo Day today! It’s so energizing to see the months of progress and hard work behind these 60 second pitches. Congrats to all of the founders presenting!
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@aaron_epstein
Aaron Epstein
6 months
“YC makes the whole process of starting and building a company way more fun and a lot less lonely”
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@aaron_epstein
Aaron Epstein
1 year
By popular demand! A new episode of Design Review is out focused entirely on mobile apps. Special thanks to @dvdsgl from @glideapps for joining me and sharing a ton of great design advice. Watch here:
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@aaron_epstein
Aaron Epstein
1 year
On top of being a really great person, Pete has a rare combination of strong technical, sales, and fundraising experience – YC founders are lucky to get to work with him!
@koomen
Pete Koomen
1 year
I’m thrilled to announce that today I’m joining @ycombinator as a Group Partner. This is the second time that YC has changed the course of my life. (🧵1/10)
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@aaron_epstein
Aaron Epstein
16 days
Full video here:
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@aaron_epstein
Aaron Epstein
1 month
Impressive execution from the Theseus team, from hackathon to shipped unjammable GPS units in 6 months!
@ilaffey2
Ian Laffey
1 month
we just shipped our first unit, to a real customer in the armed forces exactly 6 months after this first tweet
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@aaron_epstein
Aaron Epstein
1 year
A new episode of Design Review just landed on the YC YouTube channel – @garrytan joins me to break down design lessons from AI startup websites, check it out!
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@aaron_epstein
Aaron Epstein
1 year
Incredible progress from @AndyLapsa and @stoke_space in just 2.5 years since the YC W21 batch. Second stage prototype test complete, on the way to fully reusable rockets. 🚀
@stoke_space
Stoke Space
1 year
🐇
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@aaron_epstein
Aaron Epstein
7 months
I’ve been lucky to learn from @mwseibel and his leadership at YC. He does so many things behind the scenes to help founders that most people aren’t even aware of, and he’s a huge force for good in the world. Here’s to 10 more years!
@mwseibel
Michael Seibel
7 months
Some news on my next 10 years at YC:
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@aaron_epstein
Aaron Epstein
2 years
Been an incredible run for @gralston leading YC, end of an era! And no one better to take over than @garrytan – he was the first one to help us before our YC interview in 2009, & has helped countless other founders in the decade+ since. Welcome back Garry!
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@aaron_epstein
Aaron Epstein
10 years
What better use of $250k worth of Autodesk machinery than to laser-cut a @dribbble logo in seconds? http://t.co/dCFOfPyxSI
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@aaron_epstein
Aaron Epstein
7 years
Today’s an exciting day for @CreativeMarket ! Introducing Creative Market Pro – a curated design asset subscription built to help creative professionals and teams do great design work fast.
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@aaron_epstein
Aaron Epstein
4 years
I've never met anyone as passionate about fixing America's food system as @JYNiiro , so it's no surprise her company @LocalMilkRun is on fire.
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@aaron_epstein
Aaron Epstein
1 year
Congrats to all of the founders in the YC W23 batch presenting at demo day today! Excited for you to show the world all your progress and hard work.
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@aaron_epstein
Aaron Epstein
8 years
9/11 attackers hit NYC and DC. Today Dulles and JFK lead the protest against the Muslim ban. Proud to have lived in both cities. No fear.
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@aaron_epstein
Aaron Epstein
4 years
The new @ycombinator Startup Library would be my first stop if I was starting a company today – so much great info and advice in one place:
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@aaron_epstein
Aaron Epstein
7 years
Really proud that @CreativeMarket has raised nearly $200k to bring healthcare treatments to 372 patients on @watsi
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@aaron_epstein
Aaron Epstein
5 months
Excited to welcome Andrew, @ooshma , and @Xuster back to YC as Visiting Group Partners for the S24 batch!
@ycombinator
Y Combinator
5 months
Excited to announce the YC alums joining us as new Visiting Group Partners for the Summer 2024 batch! Welcome back, Andrew, @ooshma , and @Xuster !
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@aaron_epstein
Aaron Epstein
5 months
We’re live for Startup School East in Boston! Every YC Group Partner is here to meet the next generation of builders and founders.
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@aaron_epstein
Aaron Epstein
2 years
Great recap thread of my @startupschool talk on Business Models & Pricing, in case you missed it this morning!
@afscott
Alex Scott
2 years
🎓 attended @ycombinator 's @startupschool session today with @aaron_epstein : 🧰 startup business models and 💰how to monetize your product 📝 sharing my notes:
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@aaron_epstein
Aaron Epstein
8 years
I wrote a post for the @ycombinator blog on “Advice for New Managers” for all the first-time founders/managers.
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@aaron_epstein
Aaron Epstein
7 years
A lot of startups talk about "making the world a better place" – @watsi 's actually doing it.
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@aaron_epstein
Aaron Epstein
7 years
After spinning out as an independent startup again (), we're looking to hire some talented people to help us do big things. Come join us!
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@aaron_epstein
Aaron Epstein
6 years
What an inspiring story. This is why @jesslivingston has always been the heart and soul of @YCombinator .
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@aaron_epstein
Aaron Epstein
2 years
I’m excited to welcome @dflieb , @EdrizioCruz , and @umurc to YC as Visiting Group Partners this batch, and especially for @sdianahu to join as a Group Partner! Founders will be lucky to work with them.
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@aaron_epstein
Aaron Epstein
5 years
Far and away the biggest and best @ycombinator Demo Day production yet, and @domoniquefines just knocked it out of the park on the planning and execution!
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@aaron_epstein
Aaron Epstein
5 years
. @ycombinator has the largest and most interesting data set on startups, and we’re hiring a data scientist to help pull out the most valuable insights. Sound interesting? Apply here:
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@aaron_epstein
Aaron Epstein
2 months
@kumareth @ycombinator @MerseHQ @markrachapoom Current status: trough of sorrow. But if you keep going, good stuff is ahead.
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@aaron_epstein
Aaron Epstein
6 months
Excited to come to Boston for a day of in person talks and YC interviews! If you’re a student in the Northeast, sign up to join:
@ycombinator
Y Combinator
6 months
YC is coming to Boston! Join us for Startup School East on April 20, and a day of YC interviews on April 21.
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@aaron_epstein
Aaron Epstein
2 months
Who needs a professional video studio when you can just get an AI clone of yourself to make high quality videos?
@BrivaelLp
Brivael
2 months
I stacked 13K users on the @argildotai waiting list, got accepted to @ycombinator How did we do it? What is our secret sauce? In October, we pivoted the current version of Argil AI (the first one was a completely different product) Instead of rushing to build an app wrapping
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@aaron_epstein
Aaron Epstein
2 months
This advice is gold for founders learning how to be great at sales.
@ryanRneu
Ryan Neu
2 months
On Friday, I had the chance to speak with the current @ycombinator batch (S24) about founder sales and my story building @VendrHQ . Sales is a simple thing that most founders complicate. Here are my sales beliefs: -There are only two outcomes in sales, people buy or they don’t.
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@aaron_epstein
Aaron Epstein
3 months
Excited for Merse to launch: Netflix for audio-visual comics, where you can hear character voices and sounds. @markrachapoom and @kumareth have made modern comics for the digital age, and it’s super cool:
@markrachapoom
Mark Rachapoom
3 months
Today we launched Merse: Netflix for audio-visual comics. Get the app here:
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@aaron_epstein
Aaron Epstein
5 months
First ever Bluetooth connection to space! It seems inevitable now that @hubble_network will actually pull it off and build the first global battery-efficient network.
@hubble_network
hubblenetwork
5 months
🚀 We just did the impossible: the first-ever Bluetooth connection to space! This milestone is a crucial step in our ongoing efforts to build the world’s first truly global, battery-efficient, and cost-effective network.
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@aaron_epstein
Aaron Epstein
8 years
SF City Hall, lit up pink. Even the rain couldn't keep us away. #WomensMarch
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@aaron_epstein
Aaron Epstein
3 months
Super impressive tech from @argildotai
@BrivaelLp
Brivael
3 months
I just finished the @ycombinator retreat, which was pretty amazing! Thanks to all the organizers and partners for this amazing event! I want to give a special mention to Erlich Bachman, who's building Aviato 2.0 👀 I saw a sneak peek; it's amazing!
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@aaron_epstein
Aaron Epstein
2 years
YC Demo Day is here! Congrats to the S22 batch on all your progress and hard work, today’s your day.
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@aaron_epstein
Aaron Epstein
4 years
For my designer friends, this is pretty awesome.
@splinetool
Spline
4 years
🔥 Spline Alpha Release is here! Today we introduce 3D vector editing, a paradigm shift for 2D design, and a step towards a 3D-first design tool. ✍️ 3D Vector Editing 🐣 New Interactions 📸 Post-processing 👋 File Sharing 💻 Apple Silicon Support
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@aaron_epstein
Aaron Epstein
1 year
This is cool – Gusto Embedded lets other companies easily embed payroll into their own products.
@tomerlondon
Tomer London
1 year
*BIG BIG news*. I'm SO proud of this. Chase Payment Solutions has picked Gusto Embedded to build their payroll product. And it's going to be a massive win for small businesses.
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@aaron_epstein
Aaron Epstein
5 months
Fun filming this episode of Design Review with @zack415 , who had lots of great tips for making a memorable first impression.
@ycombinator
Y Combinator
5 months
Does your startup's website pass the first impression test? In this episode of Design Review, @zack415 , former CEO of Dribbble, joins YC's @aaron_epstein to review user-submitted websites in under 10 seconds and share their first impressions + advice.
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@aaron_epstein
Aaron Epstein
7 years
Congrats to @hunterwalk and @satyap on their new @homebrew fund! A lot of investors talk about being value-add, so let me give you an example of how Hunter and Satya actually are.
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@aaron_epstein
Aaron Epstein
4 years
Atmos wants to make building a house a one-click effort
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@aaron_epstein
Aaron Epstein
2 years
Surbhi has one of the most inspiring founder stories I've heard – from a cancer scare, to racking up hundreds of no's, to selling her company for $275m. Give her a follow at @SurbhiSarnaSF , and check out her upcoming book if you're into gritty against-all-odds founder stories.
@ycombinator
Y Combinator
2 years
For those of you who haven’t met her yet, @SurbhiSarnaSF is one of the newest group partners at YC. We’re excited to share that her book #WithoutADoubt drops on March 7 — and to celebrate, she's hosting a series of online founder firesides. Join us!
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@aaron_epstein
Aaron Epstein
9 years
We're matching up to $20k in donations from the @CreativeMarket community. Get great design and give back:
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@aaron_epstein
Aaron Epstein
9 years
Startups are hard because it's not enough to just build a great product…you also need to build a great company where people want to work.
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@aaron_epstein
Aaron Epstein
4 years
. @YCombinator W21 founders are lucky to get to work with @tracy_young , @reshmakhilnani , @ralphleon , @dessaigne , and Surbhi this batch!
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