Amy Saper

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Amy Saper

Amy Saper

@amy

Partner @Uncorkcap, travel addict, karaoke junkie. Past life: @Accel, @Stripe, @Uber, @Twitter, @Stanford.

San Francisco, CA Joined Mart 2009
1.1K Following13.6K Followers
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Amy Saper
Amy Saper@amy·
🎉 We're doubling down on the seed stage with $300M of new capital to back the next wave of generational founders! Since @uncorkcap was founded 21 years ago today, we’ve backed 278 companies—from Postmates to Poshmark, LaunchDarkly to Tailscale. medium.com/uncorkcapital/…
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Ben Springwater
Ben Springwater@benspringwater·
In 2019 my girlfriend (now wife) sent Patrick Collison a cold email for the ages. Patrick replied 3 minutes later, warmly, with a yes. A few weeks later I met Patrick at Nopa at 9pm. He ordered tea, I ordered something stronger. He was congenial and energetic, and 90 minutes flew by. The whole episode was special. My wife sending that email was a remarkable gift. Ditto Patrick's generosity. They say never meet your heroes but I think the better advice is to choose the right ones.
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Stuart Buck@stuartbuck1

We need a "Day in the Life of Patrick Collison." Most people in his position would be drowning 24/7 in emails and Slack messages, prepping to meet with everyone from direct reports to investors to board members, tied up with strategic decisions like "does Stripe buy company X or not," screening daily invitations to public appearances, deciding who to recruit for top positions, and much more. And yet he's doing this--how? Is he amazing at delegation? Does he have an AI-system to help him process incoming emails/texts/calls? How does he prioritize what to focus on? Does he never sleep? What is his secret??

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Amy Saper
Amy Saper@amy·
@cjc @daniel_levine The tooth fairy on our side of SF can’t fly through doors 🤷‍♀️so can only retrieve a 🦷 if it’s left hanging in a pouch on the door handle (probably too late for you guys…but pro tip for others who see this 😜)
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Cristina Cordova
Cristina Cordova@cjc·
I’m currently crawling across the floor like I’m in the CIA, trying to check under a pillow without waking the sleeping child who is 100% trying to catch me in a sting operation. The Tooth Fairy doesn't get paid enough for this level of tactical recon.
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Amy Saper retweeted
Susan
Susan@susanwliu·
@amperoshealth raises a $16M Series A led by Bessemer. Excited to see the team hit this milestone! I sat down with @mmiernowski to talk about his journey, customer relationships, and knowing when it was time to raise the A. Watch/listen: youtube.com/watch?v=o7sCo8…
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Kevin Weil 🇺🇸
Kevin Weil 🇺🇸@kevinweil·
Today is my last day at OpenAI, as OpenAI for Science is being decentralized into other research teams. It’s been a mind-expanding two years, from Chief Product Officer to joining the research team and starting OpenAI for Science. Accelerating science will be one of the most stunningly positive outcomes of our push to AGI, and I’m rooting for @sama @markchen90 @fidjissimo @gdb @merettm and the whole team!
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Gamma
Gamma@GammaApp·
Today, Gamma is featured on @Forbes AI50 list of the most promising AI companies in the world. We're honored to be a part of the 20 newcomers on this list and proud of all the work our team has done to get us here. Read more at the link in thread. Get your ideas out there.
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Alex Kehayias
Alex Kehayias@alexkehayias·
I'm excited to share that Mosey is joining @Gusto! I'm incredibly grateful to our team, customers, and investors for all of their support. Not the end! Gusto Business Compliance launching later this year. gusto.com/resources/comp…
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Ashley Mayer
Ashley Mayer@ashleymayer·
This is my #1 piece of comms advice for startup founders.
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Nik
Nik@NikMilanovic·
Sooner or later, everyone in fintech works for @Plaid.
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Andy McLoughlin
Andy McLoughlin@Bandrew·
Delighted to announce @uncorkcap's investment in Mirai (@trymirai), the platform to make on-device inference seamless, fast and multi-platform (Apple silicon today, Android soon). Mirai’s co-founders, @Darkolorin and @dmitrshvets, independently built Reface and Prisma: early on-device AI products used monthly by hundreds of millions of people globally 🚀 Read more about why we're excited - link in comments!
Mirai@trymirai

We raised $10M led by @uncorkcap to make on-device AI inference accessible to developers building on Apple Silicon. We're using the funds to expand model coverage across text, voice, and vision, working directly with model makers to bring their models on-device where latency, cost, and privacy favor local execution over cloud. Our proprietary inference engine is up to 37% faster than Apple's MLX with up to 59% faster prefill. Developers integrate it in a few lines of code without needing specialized systems expertise. The runtime supports hybrid deployments, routing inference between device and cloud seamlessly. Models running on-device are becoming a new capability layer where developers can build system-level experiences independently. We're building the infrastructure that enables that future. The round includes participation from an incredible group of angels including @dps @FrancoisChauba1 @marcinzukowski @matiii @gokulr @scooterbraun @krishnanvijay @benparr @MattPRD @adityajami and others. More on it at our blog trymirai.com/blog/mirai-rai…

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Jack Altman
Jack Altman@jaltma·
I’m really excited to share that I’m joining Benchmark. The past two years as a full time investor have been the most rewarding of my career. I really love venture capital, which is not something I ever imagined I’d say when I was kid, but here we are. I love new ideas and being part of a team with a mission. I love getting to be there for people who are struggling towards goals they really care about. I love learning from people who are better CEOs than I ever was. I love the texture of the work, the competition, and the way the job lets you invest in relationships. I love it so much that I’ve even turned into a little venture nerd with a podcast who goes around harassing great investors and founders, trying to learn as much as I can as fast as possible. I’ve certainly learned what I care most about, and what kind of investor I want to be. What I’ve realized is that I love investing at the Series A, when there’s enough going on that an investor can be useful but not so much that you can’t have an impact. I think there are many amazing ways to practice venture, it’s just the way that most speaks to me. And as I came to realize that, I started to think about how to best set myself up to do that craft as well as possible. It became clear to me there is nowhere better for this than Benchmark; the way they’re structured, their principles, their overall approach to investing, and their track record all create an environment that I believe will let me do my best work as an investor and help founders the most I possibly can. As I’ve gotten to know the team at Benchmark I’ve come to admire so much about each of them. Peter is truly playing his own game. A lot of what he says sounds like poetry at first, but as the ideas roll around in your head for a while you realize how much depth they have. I first heard about Eric many years ago from my friend Saji at Benchling while I was building Lattice, who described him as the most amazing board member and attributed him with a lot of the company’s success. That’s the kind of partner I want to be one day. Chetan is brilliant and truly thinks for himself; I’ve realized over time what a courageous guy he is. And then there’s my friend Ev, whose skills complement mine and who I just love to be around. I can’t wait to have him as a partner in crime. When given the chance to work with this group I just knew I had to go. One of my motivating north stars with Alt Capital was to build a firm and be a partner that I most would have wanted as an entrepreneur. Although I haven’t gotten everywhere I want to be yet, I’m proud of the work so far. And now I’m excited to build on that work at Benchmark, where I hope to increase my rate of learning and get armed with the power of a partnership so I can help founders reach their dreams even more. Thank you to the companies who’ve let me invest with them at Alt Cap. I’m keeping all my board seats and supporting everyone just the same as before. Thank you to the LPs who’ve backed me as well. I am so excited about the portfolio we have and am grateful I can stick with all those companies. And finally thank you to my teammates, Bala, Vivek, and Nate. Bala took a bet on me and started investing with me before it was remotely obvious, and we’ve been able to grow so much figuring it out together as investors. I credit Nate with helping Alt start feeling like a firm. He joined us from First Round over a year ago and made everything run smoothly. And while Vivek joined just a little while ago, even in the short time we’ve worked together he’s had a meaningful impact on how we think and invest. They’re all joining Benchmark with me. So pumped for this chapter.
Benchmark@benchmark

We are thrilled to share that @jaltma is joining Benchmark as our newest General Partner. The Benchmark partnership is built on a shared commitment to the craft of venture capital, where our work is defined by the depth of service and commitment to the founders we work with. We believe this work does not scale and is best practiced where we win as a team of partners. By operating as a true partnership rather than a collection of individual franchises, we ensure that every founder we back benefits from our combined experience and a singular, shared commitment to their success. We first met Jack as a founder of Lattice over a decade ago. We followed Jack as he built Lattice into a leader in its category and navigated the turbulence that every software company faced in 2020. We admired Jack’s character and the way he prioritized transparency and authenticity to build a great team. That same value system defined his transition to founding a venture capital firm, Alt Cap, where he has made a familiar commitment to craft and service over capital. As an investor, Jack has partnered with some of the most ambitious founders of the generation with his investments in Legora, Rogo, Owner, Avoca, Rippling, and many others. Founders told us “I call Jack first to work through the toughest problems,” “He is my most trusted partner on the board,” and “Jack provides steady and grounded support that is rooted in having been a founder himself.” He combines relentless energy, deep intellectual curiosity, and a competitiveness to see founders win, all anchored by high integrity. We have always believed that our firm’s strength lies in its equal partnership: a small, focused group of individuals who operate with the same authority, responsibility, and singular mission to support entrepreneurs from the earliest stages. By joining our partnership, Jack brings a fresh perspective that will help us continue this mission. Welcome to Benchmark, Jack. – Ev, Chetan, Eric, Peter

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Amy Saper
Amy Saper@amy·
"Today, Claude Code’s run-rate revenue has grown to over $2.5 billion; this figure has more than doubled since the beginning of 2026." Absolutely insane growth. Doubled revenue since the beginning of 2026?! Today is (*checks notes*)...Feb 12th 🤯
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Anthropic@AnthropicAI

Our run-rate revenue is $14 billion, and has grown over 10x in each of the past 3 years. This growth has been driven by our position as the intelligence platform of choice for enterprises and developers. Read more: anthropic.com/news/anthropic…

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Amy Saper
Amy Saper@amy·
It's rare to see founders as intentional and consistent about setting up their company's mission, vision, and values for the long haul, even before they've earned a dollar of revenue. Had fun reflecting on the last 4.5 years of Gamma's journey here: medium.com/uncorkcapital/…
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Amy Saper
Amy Saper@amy·
When I first led @Gamma's seed round in 2021, ChatGPT didn't exist. Waymo wasn't yet publicly available. Humans wrote the vast majority of code. Fast forward to late 2025 when I invested a second time with @uncorkcap, the world had transformed, and Gamma's progress massively accelerated ($0 ➡️ $100M!), but so many things remained the same.
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Amy Saper
Amy Saper@amy·
@kevinweil I love this!! Reminds me of OG Twitter 🫶🚀
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Kevin Weil 🇺🇸
Kevin Weil 🇺🇸@kevinweil·
High school student uses AI to discover 1M+ objects humans missed in astronomical data. Head of NASA openly recruiting him through Twitter with a fighter jet ride included. All my worlds colliding. I love everything about this.
Jared Isaacman@rookisaacman

@curiosityonx Matteo please apply to work at NASA and I will personally throw in a fighter jet ride as a signing bonus

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Amy Saper
Amy Saper@amy·
Excited to share that @uncorkcap is leading the seed round in Buildcheck.ai! Construction is a $12 trillion industry, yet design reviews are still manual and inefficient. Buildcheck's computer vision models and collaboration features drastically improve the experience. medium.com/uncorkcapital/…
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