Aaron Harris Profile Banner
Aaron Harris Profile
Aaron Harris

@harris

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Building Magid & Co. Was a partner at YC. Wrote the Series A Guide. Takes photos. Weekly market data:

New York
Joined April 2010
Don't wanna be here? Send us removal request.
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@harris
Aaron Harris
3 months
How to Raise a Series A - a new manual for raising the hardest round.
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@harris
Aaron Harris
2 years
Turns out that running one startup is a lot harder than advising 1000 startups.
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@harris
Aaron Harris
1 year
Across the ~30 unicorns I’ve funded, there’s only one common founder trait: optimism.
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@harris
Aaron Harris
3 years
If a "pre-seed" is 1.5m on 10, and a "seed" is 5-7 on 20-30, can we all just agree to hit "reset" and go back to "seed" and "Series A"?
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@harris
Aaron Harris
2 years
After a year back at operating, I'm realizing that most of the specific operating advice I gave founders in my last few years at YC was...stale.
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@harris
Aaron Harris
7 months
Jewish friends in Brooklyn are being told to avoid going into the street on Saturday because of a "Flood Brooklyn for Gaza" protest. In 2023. In America. In Brooklyn. Here's a thought @ericadamsfornyc and @NYPDCT - stop the dangerous protest instead of telling Jews to hide in…
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@harris
Aaron Harris
1 year
It has become terrifyingly clear to me that everyone I look up to is making it up as they go along.
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@harris
Aaron Harris
10 months
The strongest predictor of founder success may just be a willingness to look stupid.
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@harris
Aaron Harris
7 months
"From the river to the sea" is an explicit call for the murder of 6 million Jews in Israel. To chant it with friends or post it to social media is to incite genocide. Inciting genocide is a crime against humanity according to the Genocide Convention of 1948. So, no, I will not…
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@harris
Aaron Harris
2 years
I get that investors want startups to cut burn and "survive" because of how risky the world is. But startups are risks dressed up as businesses. They live if they grow. They die if they are static. Runway isn't the end goal. Don't sacrifice your ambition just to get more of it.
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@harris
Aaron Harris
2 years
VCs can wait. Founders can't.
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@harris
Aaron Harris
1 year
Great VCs say no quickly and clearly after a pitch. Good VCs say no after opening your deck 10 times over a week. Bad VCs ghost you after telling you how excited they are.
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@harris
Aaron Harris
7 months
Every Jew you know has a family member or a friend who was murdered this week. Every Jew you know has a friend or family member currently being called to the front lines of a terrible war. Every Jew you know is viscerally aware of how thin the line is between life and death.…
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@harris
Aaron Harris
11 months
Founders who think they're smart often fall into the trap of thinking that being smart is a competitive advantage.
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@harris
Aaron Harris
2 years
The most important lesson I ever learned from @paulg is that conversations are better while walking.
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@harris
Aaron Harris
2 years
I'd love to be able to claim that my best startup investments were obvious winners from the start. They weren't. I bet on people that seemed thoughtful and ambitious. And then...luck.
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@harris
Aaron Harris
2 years
Great startups happen when founders figure out how to get paid for being themselves.
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@harris
Aaron Harris
1 year
The biggest risk in VC isn't fraud, it's over-learning from past mistakes.
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@harris
Aaron Harris
1 year
There must be a german word for: "The moment in life when a founder suddenly realizes that, for the first time, he is older than the VC making the decision."
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@harris
Aaron Harris
11 months
Not sure which is a worse signal, the founder that sends: 1. No investor updates. 2. Multi-thousand word investor updates with no metrics.
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@harris
Aaron Harris
11 months
A VC who says "We want to co-lead" without giving you a term sheet does not want to lead your round. This is a soft let down that preserves optionality by making you feel good. Don't fall for it. Don't let them make intros. Don't ask them for advice on your process.
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@harris
Aaron Harris
1 year
Predictions for fundraising in 2023: 1. Many startups will raise money and many will not. 2. VCs will chase some companies and ghost others.
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@harris
Aaron Harris
2 years
It's odd to watch VCs flip from excited to ghosting founders who hit a rough patch. The theory seems to be that founders won't remember...but they do.
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@harris
Aaron Harris
1 year
There's plenty of bad news in the world. But Germany building an LNG terminal in months instead of years is a demonstration of how fast humans can move, if given the right incentives and regulatory structure.
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@harris
Aaron Harris
1 year
The riskiest bets in startups are those on category creation. They're also the bets most worth making.
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@harris
Aaron Harris
1 year
Do solo gps have their holiday parties sitting alone at omakase bars?
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@harris
Aaron Harris
11 months
"Execution is everything" is a pleasant and misleading fiction for founders. You need a good enough idea in a large enough market.
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@harris
Aaron Harris
1 year
Founders can get a surprisingly large amount wrong and still succeed.
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@harris
Aaron Harris
7 months
Dear @nytimes - An editor's note seems...ludicrously insufficient. How about an A1 above the fold story titled "Islamic Jihad Responsible for Hospital Blast" along with an analysis of the number of casualties in Gaza from the 500+ Hamas rockets that fell short of their civilian…
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@harris
Aaron Harris
1 year
VCs are the absolute best in the world at enthusiastically avoiding commitment.
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@harris
Aaron Harris
2 years
Dear founders - surround yourselves with people who are irrationally optimistic about your abilities.
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@harris
Aaron Harris
2 years
Sure is a great time to be a VC with a fresh fund to invest.
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@harris
Aaron Harris
1 year
The worst fundraising advice comes from well meaning, inexperienced investors who want to be helpful and to sound smart.
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@harris
Aaron Harris
1 year
In the next five years, seed companies that have 3+ years of runway will underperform seed companies with with less than 18 months.
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@harris
Aaron Harris
1 year
Cold email remains the best, most underrated, and most widely applicable growth channel.
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@harris
Aaron Harris
2 years
Congrats to @garrytan on heading back to @ycombinator . He's the perfect choice to lead it into the future.
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@harris
Aaron Harris
1 year
The quality of startup advice is inversely correlated to the certainty with which it is delivered.
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@harris
Aaron Harris
6 months
Happy to no longer be a resident of Oakland, CA.
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@harris
Aaron Harris
2 years
VC power move - sending the term sheet even if you know the founder may "shop" the offer. It's actually the best way to get pole position in the auction and drive a better deal.
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@harris
Aaron Harris
1 year
@paulg That's fair. Guess I should have been less absolute so as not to have fallen into my own trap.
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@harris
Aaron Harris
1 year
OpenAI bills are the new AWS bills.
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@harris
Aaron Harris
2 years
Early stage founders need to build products. Mid stage founders need to build companies. Later stage founders need to make sure the company doesn't become their most time consuming product.
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@harris
Aaron Harris
2 years
In retrospect, it’s shocking I didn’t accidentally fund way more fraud while at YC.
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@harris
Aaron Harris
1 year
TIL that @Schwarzenegger invested in @google 's Series A. So now I understand why they're so cautious about releasing untested AI.
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@harris
Aaron Harris
7 months
We have the words.
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@harris
Aaron Harris
1 year
A bizarrely large amount of success in business seems to come down to not being flaky.
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@harris
Aaron Harris
2 years
Finding product market fit is a whole lot harder than advising someone else to do it.
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@harris
Aaron Harris
1 year
I know startups are over and all - but currently talking to the founders of three wildly different companies setting daily, weekly, and monthly records...day after day. Turns out you just need to find the right founders. They'll win regardless of the market.
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@harris
Aaron Harris
6 months
Hamas is holding 239 hostages. They are holding babies, the elderly, women, children, and men. #BringThemHome
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@harris
Aaron Harris
6 months
My friend Rabbi Hirschy Zarchi of @harvardchabad is being slandered by @HarvardPSC . His words stand for themselves - their twisted versions are a lie. Listen for yourself to what he says, not their interpretation of it. He and his family are being…
@HarvxrdPSC
Harvxrd Palestine Solidarity Committee
6 months
🧵 THREAD: Harvard Rabbi Zarchi preaches anti-Palestinian racism. In a speech to the community on Nov 4, he made a distinction between humans and “four-legged animals.” Apparently, calling for a #CeasefireNow and an end to the occupation makes us “below animals,” even…
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@harris
Aaron Harris
1 year
In startups, the only games worth playing are the long ones.
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@harris
Aaron Harris
10 months
Every startup wants to be a big company. Every big company wants to be a startup.
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@harris
Aaron Harris
1 year
Surest predictor of startup failure: When the founder is more famous than the product.
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@harris
Aaron Harris
7 months
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@harris
Aaron Harris
1 year
Wondering how @deel got to be worth $5.5B? It's because @Bouazizalex only raises money when he doesn't need it. He chooses who can buy a piece of the company, instead of chasing investors. At the A, that was @illscience and @a16z That and more on:
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@harris
Aaron Harris
1 year
Biases of good founders: Cleverness > IQ Action > Analysis Iteration > Perfection Failure > Stasis
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@harris
Aaron Harris
1 year
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@harris
Aaron Harris
2 years
When you're building a company, irrelevance is a lot scarier than failure.
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@harris
Aaron Harris
3 years
(2008) Fractionalized home loan turned into synthetic asset = evil CDO. (2021) Fractionalized home loan turned into synthetic asset = super cool NFT. Context sure is funny sometimes.
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@harris
Aaron Harris
8 months
Startups should charge higher prices.
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@harris
Aaron Harris
10 months
The simplest way to destroy your startup is to change your primary metric every time you miss a goal.
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@harris
Aaron Harris
2 years
Every so often, my only feedback to a founder on a new product is "Yeah, this makes perfect sense." I love when that happens.
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@harris
Aaron Harris
1 year
Competitive moats are a whole lot less interesting than compounding advantages.
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@harris
Aaron Harris
1 year
Re: sharing your idea. No big company is going to copy your idea when you build the 1st version. Or when you get seed funded. Or at your A or your B. They'll only copy you when you've demonstrated significant scale, at which point you can't hide. So just share your idea.
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@harris
Aaron Harris
1 year
Not sure what's more confusing for founders, a VC fund where everyone is a "partner" or where everyone is an "investor"
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@harris
Aaron Harris
5 months
My bubbe was born on Chanukah in Lodz, Poland. In her lifetime, lighting a menorah became an act of bravery. In her lifetime, the State of Israel was established. My daughter was born on Chanukah in New York City. In her lifetime, lighting a menorah has again become an act of…
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@harris
Aaron Harris
1 year
Great founders balance an objective view of the market with an irrational belief of their ability to change the way the world works.
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@harris
Aaron Harris
3 years
Some new photos.
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@harris
Aaron Harris
1 year
Watching ChatGPT I'm reminded of the fact that viral products are nearly always a surprise. That makes them hard to replicate, no matter how many pitch decks and growth experts might claim otherwise.
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@harris
Aaron Harris
2 years
Great startups are so obvious in hindsight.
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@harris
Aaron Harris
1 year
Turns out the future or work involves doing work.
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@harris
Aaron Harris
2 years
All the recent VC advice to startups about trimming burn is oddly one sided. Founders did not unilaterally and irrationally raise money from the ether. This is a market and ecosystem, each participant played its part and each has to adjust to a new set of circumstances.
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@harris
Aaron Harris
1 year
In startups, it is ok to be wrong most of the time so long as: 1) You are not catastrophically wrong 2) The reward for being right is big enough
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@harris
Aaron Harris
2 years
There's never a good reason for generic stock photography on your homepage. Or in your deck.
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@harris
Aaron Harris
1 year
Bad ideas make bad startups. Non-obvious ideas might look like bad ideas, but are fundamentally different. These are the source of many great startups. Most people confuse the two with predictable results.
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@harris
Aaron Harris
2 years
Chris enjoys doing extremely hard things. Last time, he built a distribution network of farmers in Africa. Excited to see what he does with Spritz.
@spritzfinance
Spritz Finance
2 years
Today we announce our $2.5m pre-seed funding round!🍹 We're incredibly proud of what we've built so far & excited to continue building a seamless way to pay your bills with #crypto . Learn more about our funding and our #web3 bill pay platform. 🧵 1/16
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@harris
Aaron Harris
10 months
Nothing excites the average VC more than someone else writing a term sheet.
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@harris
Aaron Harris
6 months
Hamas is holding 240+ hostages. They are holding babies, the elderly, women, children, and men. #BringThemHome
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@harris
Aaron Harris
2 years
Noticing that nearly every significant round announcement these days includes the valuation. I remember when this was treated as a closely guarded secret. The convention has clearly shifted.
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@harris
Aaron Harris
2 years
VCs are stressed that they don't know how to price deals anymore as if there was ever a science to it.
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@harris
Aaron Harris
1 year
Trying to build a big startup by copying the habits of a "billionaire" you saw on youtube is like trying to fly by flapping your arms.
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@harris
Aaron Harris
1 year
I find that it is much easier to be a contrarian on twitter than when actually writing a check.
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@harris
Aaron Harris
6 months
Hamas is holding 239 hostages. They are holding babies, the elderly, women, children, and men. #BringThemHome
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@harris
Aaron Harris
2 years
Don't start a company with a cofounder to get more work done. Start a company with a cofounder so you have someone to talk to.
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@harris
Aaron Harris
7 months
We stood. Tens of thousands of Jews and our friends stood. We prayed for the living and the dead. We demanded Justice. We did not celebrate death, not even the deaths of those who murdered our children.
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@harris
Aaron Harris
2 years
If founders were better managers, I think we'd have fewer great companies.
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@harris
Aaron Harris
2 years
@ilyasu How to hire and growth channels/tactics.
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@harris
Aaron Harris
2 years
Nothing turns a day around quite like an honest conversation with a great founder.
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@harris
Aaron Harris
1 year
I miss the simpler times, when 1 successful company at a time was enough for even the most ambitious founders.
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@harris
Aaron Harris
1 year
Too much popular startup wisdom is made up of circular references. Raise money when you can. A players hire A players. Hard problems are hard.
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@harris
Aaron Harris
1 year
I'm confused by the whole "AI is the new Web3" narrative, as if one interesting technology has to die for another to work out. The foundational strength of startups is that progress is positive sum. When new products work, the possibilities keep growing.
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@harris
Aaron Harris
2 years
Explicitly list all the things that have to go right for your startup to win. Look at the list and figure out which are in your control, which are out of it, and which are just dreams. Don't rely on the dreams.
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@harris
Aaron Harris
1 year
The best natural fundraisers are generally the worst advisers on fundraising. They haven't seen enough of the ways it can all go wrong, and often recommend tactics that only work for them.
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@harris
Aaron Harris
1 year
New Year’s Resolution: Don’t count your unicorns before they hatch.
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@harris
Aaron Harris
2 years
When a company is growing and hiring, it shows the culture it wants. When a company is under stress and laying people off, it shows the culture it has.
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@harris
Aaron Harris
3 years
. @janellehmtam and I have advised ~300 companies on their Series As. We're hosting a workshop next week focused on the most common question we get asked, "When should I raise my A?!?!" 7/28 @ 10:00am PDT. Signup here:
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