Kathryn Wu
@Kathrynwu088
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Founder @Openmartai (Backed by @ycombinator ) | Previously cs @cal
Joined August 2023
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Pinned Tweet
One
@ycombinator
company previously spent days scraping Google Maps to find all 1-3 location restaurants with decent Google reviews. Now, they can do it within five minutes using Openmart. Get yourself a demo at
25
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483
Great book by
@james406
! The first time I read it was during YC, and many things seemed ambiguous. The second time, three months later on a flight, I was clearer about our level in this game. Will read it again with my cofounder after another three months.
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Yesterday, we helped a
@ycombinator
company find all accounting firms and gave their sales team a location visualization in 5 minutes. They had spent months building an internal system for the same purpose.
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909
First successful referral to
@ycombinator
!! Persuading my talented friends to start a company and go through the darkness together, and seeing great people win is such a blast.
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Yesterday, we helped a Series B company find all medical supplier companies on Gmaps and determine what they sell in just 5 minutes. Previously, this company had built an internal system that provided less comprehensive results, and it is no longer being maintained.
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Today, we helped a
@ycombinator
company find all hair salons and their booking software. It’s cool to see many founders working to improve SMB operations. Time for the next-gen booking system—every 10 years, the cycle repeats. Old software gets revamped, or new ones take over!
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287
12 months ago, we recorded our
@ycombinator
app video. 6 months ago, Richard pitched us at Demo Day. 1 month ago, we signed with a dream company and got featured by TechCrunch. Today’s Demo Day again. This year’s been one of the most fulfilling of my 27. Onward!
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Thank you
@ycombinator
for an awesome alumni event! It was amazing to see friends from all over the world. Until next time! 🔥
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while everyone else enjoys life, doing startup requires you to stay focused and accountable. That's why startups hire cracked ones. Staying away from all the fun is not easy.
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plan to write a version for Gen Z salespeople like me, mainly focusing on the many mistakes I made and the lessons I learned..🫠
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Yesterday, we helped a
@ycombinator
company qualify 10k Instagram seller accounts in bulk, enrich, and prioritize the big opportunities for them since we have tons of SMB data. Before this, they were spending $30k per month on BPOs.
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One
@ycombinator
company used
@openmartai
to enrich a file of SMB restaurants within five minutes and found the owner names and contact information for an additional 30% of the restaurants. Previously took their BPO team a day to enrich.
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In the last YC batch, most of us were still figuring out what we wanted to do at the beginning of the batch. This batch, most of them have already launched on YC.
looks like mvp got developed faster and capital became more and more efficient nowadays
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We are kinda profitable already since we have traction +
@mercury
also pays interest rate. 😅ty Mercury!
@openmartai
won’t raise large amount of money 💰 before making sure our product is ready to scale even we have the option to do so. :) Thanks to the technology and
@deel
-
A YC startup in the middle of fundraising found a way to cut their costs by 2/3. Now they don't need to raise at all. They can make it to profitability on the money they already have. Bet you can guess what will happen when they tell investors they're shutting down the raise.
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Spent several days in Hawaii and realized that startup founders can't really "often" have fun in the typical sense (drinks, casual chats with friends, good food, and views) while working on a startup. It's very, very hard to switch contexts between having fun and doing meticulous
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The reason why you need to apply for
@ycombinator
's fall batch: It's about the community. We learned best practices from hundreds of people. Being surrounded by smart individuals can improve your IQ over time. I never considered myself as smart as those around me, but my brain
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On a uber right now, driver is listening to
@ycombinator
‘s podcast about pivoting stories. I can’t even escape from startup stuff for one night, can I? 😄
The driver did ask me whether I want to switch to songs, though
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2
113
Yesterday, we helped a
@ycombinator
company find all custom home builders in the US within five minutes and exclude certain types like general contractors and others. Previously, searching with other data providers required extensive filtering efforts over several days.
7
2
112
After
@ycombinator
, I'll call the group office hour a group therapy session.😅
Group 3-F 🚀
I will post every time we meet until we no longer meet.
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getting product-market fit is rare for seed-stage startups, so it’s better not to fake it. Be honest about platform limitations. Initially, we overpromised and underdelivered, leading to disappointment. Lowering expectations can work better than promising everything
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One
@ycombinator
company previously spent days finding imaging centers and their decision makers to sell their image recognition technology. Now, they can do it within five minutes using
@openmartai
's AI leads finder . Get yourself a demo at .
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94
The reason I reply to some cold messages now is because I know how hard it is at the beginning of a startup. It gets harder for sure, but I’ll never forget who helped with the first check, the first customers, and all those early supporters. It makes me want to give back.
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Seed stage investors out there, please meet founders and bet on people who are resilient, lifelong hustlers, since everyone can have a big idea. Betting on people who have suffered before and still remain very positive will be one of my core beliefs/thesis if I have my own fund.
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Today is the last day to apply to
@ycombinator
.
@openmartai
learned a lot from the three-month journey.
Here are several key things we benefited from YC in the thread. 👉
If you happen to sell to local business, please DM me!
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15 days until
@ycombinator
‘s demo day -
Four days after using our tool, some customers already closed a great deal. It’s not huge amount, but I believe in
@openmartai
‘s potential to unlock large deal💰💰💰！
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2
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A lot of respect to some of my fav
@ycombinator
female founders in this batch!! 💪💪💪💪
@aymannadeem
@peggy_wang
@upekabee
Didn’t have time to do a selfie with some other folks! Let’s do it next time!!
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The top learning I got from my
@ycombinator
experience is that everything—user traction, social media presence, product quality—improves little step by little step in the past several months. I never expected us to achieve strong product-market fit in several months like Airbnb,
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71
People are posting more on social media after YC since being shameless is important to get more customers. No one reaches product-market fit that quickly, and getting more harsh feedback from people is the key
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The first group office hour after
@ycombinator
’s demo day - we talked about what might make our company die. The topic was heavy, and we sort of promised ourselves that we would all work out often and ensure we stay healthy. 💪
Thank you Lukas for playing group partner role for
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20 days until
@ycombinator
's demo day, Lots of people have been asking us about the experience of building in public. Personally, I'm okay with it because I don't worry about posting the best content on the internet. Being carefree is something I've sort of picked up about some
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It’s so great to meet all women founder in
@ycombinator
‘s current batch on this special day. Happy international women’s day!!! ❤️❤️❤️
@lina_colucci
@peggy_wang
@KumlehnMaria
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Product demo videos and regular posting on Twitter actually got us higher quality leads than a fundraising announcement. This is kinda within our expectation!
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Happy weekend!!
@ycombinator
alumni demo just started! Can’t wait to see all great work by my batch mates🫡🫡
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Key takeaways from
@bryan_johnson
: Stress impacts longevity. Manage it by sleeping early, exercising, and eating healthy. Can use Whoop & Eight Sleep to monitor and improve sleep. I slept at 11:30 pm last night and feel great today!
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Being around positive, vivacious people will make you feel like nothing is impossible.
Sometimes I feel there’s a chance
@openmartai
can grow to be a $1 billion business.
That’s also the effect of
@ycombinator
- it taught me to dream big!
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YC ended but friendship continues!
This past weekend,
@openmartai
organized a fun event! Richard and I brought our dogs to help some of our close founder friends destress a bit at Dolores Park! Thanks to all for dropping by! We might organize another dog therapy session in two
3
1
54
At the beginning, we treated more like a game after leaving our job. In the worst case, Richard and I would go back to big tech companies. After going through
@ycombinator
, we have become much more ambitious; every percentage of the company matters. We
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My co-founder
@RealRichomie
will present
@openmartai
soon at
@ycombinator
‘s demo day!!
Let’s watch out for it 🫡🫡🫡👉
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1
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Why are so many companies trying to send emails to the W24 batch this week? It's the busiest week ever. Some service providers even followed up with me three times with a subject line saying 'Got a break from demo day?'.
Back in the days when I was at Pinterest, we were working
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0
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New feature update! Yesterday, we helped a
@ycombinator
company track newly opened restaurants with owner info in the Bay Area that fit their ideal customer profile. Their sales team jumped on it and pitched their solution to one of the stores this afternoon. ✌️
2
5
52
Today, we met multiple investors who passed on us at investor reception. I give them
@openmartai
’s business card. No hard feeling at all since most of them are very nice people.
Would love to keep in touch and best of luck!! :) Tbh, I am always grateful for rejections, and
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0
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Took tons of econ, marketing, and stats classes… but turns out, building something of your own has way less to do with theory and way more to do with learning by doing.
When I talk to students they often think that if they want to start a startup one day they should be learning about economics or finance. I tell them they should instead be learning how to build things. Building is the root.
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Today’s been a race against time, but thank you for growing with us on Twitter! We started using social media in February, taking a leap of faith to build in public. The love and feedback from strangers have been incredible. We’re not perfect, but we know what to improve.
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I’m blocking off all Fridays for focused work—no more sales calls or follow-ups. Only 20%-30% of people show up to Friday demo calls, and most aren’t qualified. Sunday works better for chatting or following up with customers based on the response rate.
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Once in a lifetime experience!! :)
@RealRichomie
@gustaf
Thank you
@gustaf
for giving us the opportunity!! Always grateful!
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Our quarterly offsite at Los Altos - Feel more energized after embracing nature.
We’re hiring our first engineer in the US! Apply through our yc job portal.
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We’ve noticed that people are looking for contacts across various industries and verticals since we launched Openmart. Just yesterday, we helped a
@ycombinator
find all non-chain gas stations across the US, along with the decision makers' names and contacts, in just minutes!
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1
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After graduating from YC,
@openmartai
started to learn more from its customers again. It’s not easy to build a product people want to use daily. We’re on it! 💪💪
3
0
39
Last few days to apply for
@ycombinator
’s fall batch! 🙌🙌After hundreds of customer interviews, what pain points do you know about your customers? Send me screenshots of your application, and I might roast it!
#YCApply
#Startups
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1
38
A week after
@ycombinator
's demo day.
We finally got the comprehensive list of customers! Sometimes, I get a bit OCD when organizing things. Once I start organizing, I need it to be 100% correct. This way, I can track how many customers actually converted, how many ghosted, and
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Looking back, many people who hung out with us often in the middle of last year have all started companies or are actively exploring. It’s like when everyone around you is doing it and trying to explore something new, starting a startup doesn’t feel as risky and uncomfortable.
2
1
36
Thanks to the
@ycombinator
community for an awesome marketing and sales night, organized by
@ChrisJBakke
and
@JamesonZaballos
. Learned a lot with
@davj
,
@pritika_mehta
,
@yuxinzoo
, and more! If you're a technical founder looking for someone who writes great marketing content, work
2
2
35
18 days until
@ycombinator
's demo day.
How do you choose a co-founder? Most startups fail due to co-founder breakups... Before Series B, people are all trying to find product-market fit, so there is usually no real failure on the idea itself.
@RealRichomie
and I met each other
3
1
34
We are so excited to be at the AI Startup Hackathon today with
@octolane_app
,
@openmartai
,
@retellai
, &
@amidlabs
@tryfondo
Lots of amazing SF builders here! 🛠️
2
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34
I've realized that the startup world is quite small. There aren't many great startups existing at the same time. Startups come and go; you just need to keep it alive with a little bit of patience. What about those big incumbents: first they ignore you, then they laugh at you,
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2
34
Group 3 meetup> Thanks for organizing,
@richardfzhang
! Make a bet – how many unicorns will there be in this video in the future? 🚀🫡
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1
33
In Hawaii for a few days for a friend’s wedding, wearing
@openmartai
’s shirt above the island🚀
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0
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Seed-stage startups sell the chance to work directly with the founder, unlike sales from bigger companies that focus on ROI. Founders bring valuable experience you can't find on Upwork or Fiverr. Our product is about 50% ready. I'll handle the manual work and share my knowledge,
3
2
32
We've done a lot of things that don't scale. Today, we made cold calls to 400+ warehouses to figure out the best way to serve our customers. Sometimes, it's more about delivering true value and seeing if some not-so-scalable methods can become more scalable some day...
7
0
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it's all about managing uncertainties
as a gen Z founder, i'll keep posting about my journey of finding PMF.
do we have a market or do we not have a market? especially when your product isn't yet ready for big companies or enterprises
3
0
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I��ve decided to stay away from the laptop for a day and go exercise a bit! Hopefully, that will help with deep focus on my work next week!
3
0
30
My co-founder drew wisdom from
@ycombinator
’s graduation ceremony and immediately bought himself some longevity and protein mix to stay healthy. 😊
We’re trying to take action items from W24 post mortem one by one I guess 😅
@bryan_johnson
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1
30
Twitter is much better than LinkedIn for building in public. LinkedIn has too many people who are just looking for jobs, while Twitter is where people are searching for innovative solutions
5
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was thinking about hiring a social media intern for us before, but it looks like writing a post myself will take less time than the managing the person + communication. will probably only consider this after Series A. sometimes you thought someone took something off from your
5
1
29
Startup founders: what are the best hiring agencies that you work with right now? Pls contact me.
We're looking for:
Over 4 years of experience in Python backend development
Over 2 years of experience in elasticsearch/opensearch
Over 1 year of experience in developing AI agents
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A smart subject line makes me immediately open the email. There are too many AI-generated long emails. We don’t need fancy words, just this kind of concise email works I guess
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My co-founder and I were born at the border of Gen Z and Millennials. As people probably know, Gen Z is really into new experiences, but Millennials are more practical when making choices. I feel we are more towards Gen Z, optimizing for life experience. One of the best
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0
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A lot of respect to
@BessemerVP
It released this page to honor the companies they missed. :)
To my fellow batch mates, it’s too early to say, but I wish you all make this kind of list.
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We have our internal dashboard. It's not true since it calculated one SAFE toward our income. 😅Hopefully, one day for
@openmartai
.
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We are growing fast and would love to have a rockstar&cracked founding engineer join us at our Foster City office. You’ll need to be within our network—some of our friends know you. If that’s the case, let’s chat! We have two office dogs, too!
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Observations from many people suggest that great founders must be decent and helpful people. A mean vibe won’t get you anywhere.
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Very excited about what our engineering team has achieved in the past two months after full-time building.
We pulled 1000 results from competitors to see their ability to fetch SMB owners, and we won on accuracy and coverage. If you want to sell to more SMBs, talk to me!
1
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👋
@openmartai
is at the AI World Fair in San Francisco today for a couple of hours. If you're here, feel free to come and say hi!
0
1
24
We had some tricky stuff happen today, but it's no big deal looking back and we learnt a lot; startups are like that. We just need to lower our expectations to deal with different kinds of weird situations. YC and our investors have already made this whole startup experience very
0
0
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Startups should start from a niche because only by starting from a niche do you have a chance to beat some incumbents that overlook the market.
5
0
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Found that losing body fat is a marathon just like doing a startup, need to wait at least four months+, the results arrive gradually
5
1
23
After figuring out the ICP, I know immediately which deals I lost and which deals I should’ve lost to save my time! Great timing to kick off Q3—looking forward to hitting the goal!!
0
0
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Ups and downs, ups and downs. I've never been someone who enjoys roller coasters physically, but I'm actually starting to enjoy these mental ups and downs.
2
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Today,
@openmartai
helped a Series A company close a deal with a nonprofit by providing leads they couldn’t find either on Apollo or ZoomInfo. We used comprehensive data sources like and different others. Get you a demo at .
1
3
22
hey,
@openmartai
is
#hiring
a founding engineer. Know anyone who might be interested? HR agency, pls don't contact me.
1. You need to be hardworking, care about customers, and react quickly to customer feedback.
2. We welcome honest, humble, and friendly people to join us. We're
1
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19
It took us three weeks to realize how to manage the team better as Gen Z founders. Everything should be deadline-driven. How to keep people always motivated is still to be explored, perhaps through money, emotion, or customer signups.
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thank you twitter followers!!
strangers are trusting us for no reason even my parents asked me not to mess around and just chill haha...🫶😭
pls contact founders
@openmart
.ai if you want to angel invest. we only got small portion of allocation left for that. our goal is to get
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having a good semi-competitor who’s doing well is like having a role model to look up to. great benchmark to help us improve our system every single day
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1
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Openmart has just started fundraising. We're an AI alternative to ZoomInfo.
@openmartai
If you're considering angel investing in a
@ycombinator
startup, feel free to DM
@RealRichomie
or me. 💪 We might not be able to coordinate every single call, but we'll try to talk to more
3
4
20
Excited to partner with
@skeptrune
and Thrieve! We're building the world's largest local business directory and qualification workflow together for enterprises to make selling 100x easier.
0
0
21
In week 1 of trying to reduce body fat, I’ve noticed that sometimes I feel less energetic, especially during fundraising last month. So, why not become healthier and do the startup at the same time? I’ll report the progress of becoming healthier and its correlation with our
1
0
20
I truly believe that good content will attract a lot of user interest.
@openmartai
has received a lot of inbound interests in the past month. The good thing is that I do love writing stuff : ) I'm not really a good writer, but I have the habit of recording those things. In my
1
1
19
So
@openmartai
is here to replace Zoominfo 💪: )
A lot of companies have seen CAC payback periods explode because of slower growth and higher churn.
ZoomInfo’s recent quarter shows how quickly things can turn - a 12 yr payback isn’t sustainable.
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2
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Startup life is all about learning something new within one or two hours to execute. I just learned about offshore hiring laws and equity/option exercise procedures. Those are fun; understanding how the law and everything works and trying to find space in between, hacking the
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2
18
30 days until
@ycombinator
's demo day.
Some unusual tips around sales:
1. Only do 6-8 quality sales calls per day
2. Do that in the morning since both sides are energetic
3. Small talk for at least five minutes, find common things between you guys. same hobby, same school, both
0
0
18
Saw this when we left YC’s office today 😂
@thoropass
good GTM strategy. Great LTV/Cac , the driver said he will park here for an hour.
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