J.J. Fliegelman

Building @FirstHarmonic, former Visiting Partner at @YCombinator and co-founder of @WayUp. Travel addict, armchair linguist, and builder.

[J.J. Fliegelman @JdotJdotF]

More of this, less “we’ll all be unemployed” please

[Neil Stone @DrNeilStone]

I've never been at a medical conference where the results have been greeted with a standing ovation

Tremendous breakthrough in pancreatic cancer treatment

Through science

Hard work, rigorous research, clinical trials.

Science

Not the quack pseudoscience of social media

[J.J. Fliegelman @JdotJdotF]

Excited to be leading my TENTH YC Demo Day Fund for P26! 3 years of doing YC investing and I'm amazed how much YC continues to be the best crop of early-stage startups out there. Closing soon -- click here to join!
https://t.co/rkm2Uc0axY

[J.J. Fliegelman @JdotJdotF]

@brettberson @grosen Also just a genuinely nice and caring guy

[J.J. Fliegelman @JdotJdotF]

This is so cool. I love seeing two great companies like @Starcloud_ and @SpaceX working together to improve humanity

[Philip Johnston @PhilipJohnston]

I’m super excited to share that we have signed a contract with @SpaceX @Starlink to integrate its mini laser terminals onto our satellites for high bandwidth, low latency connectivity!

[J.J. Fliegelman @JdotJdotF]

Request for startups: someone building the AI software layer for companies to do truly robust self-hosted Postgres

[Nik Samokhvalov @samokhvalov]

FOSS like Postgres killed Oracle's grip on the enterprise.

AI is about to do the same to RDS in the cloud.

Spent an hour today with a customer moving ~100 Postgres clusters off RDS.

Backups and HA aren't the hard part anymore. What's needed is an AI observability + intelligent ops layer -- to keep the fleet healthy at scale, and dev velocity high and safe.

The data layer is repatriating.

[J.J. Fliegelman @JdotJdotF]

Who is doing sandboxes-as-a-service-as-a-service? So many sandbox providers I can't keep it all straight, kind of amazing there isn't someone just providing the underlying infra for all of this for everyone who wants to offer their own

[J.J. Fliegelman @JdotJdotF]

I love this company and @tejasmanohar, @kashgupta_ , and @joshwget. I'm so impressed by what they've accomplished and continue to from the earliest days of "reverse ETL." I'm excited to watch them help enterprises leverage AI to transform how they do marketing!

[Tejas Manohar @tejasmanohar]

i'm really excited to share that we've raised a 150M Series D valuing @hightouchdata at $2.75B

WSJ broke the news this morning, which is honestly a "pinch me" moment as a founder

there's already AI for legal, customer service, and coding

we're building the AI platform for marketers.

[J.J. Fliegelman @JdotJdotF]

@ItzSuds . @FlyFlat_Travel is what you’re looking for. They specialize in great deals on international business class

[daniel @DanielEdrisian]

I've left OpenAI and the Codex team to build Blackstar: A new hardware company building the future of human-computer interaction.

We believe that software is solved. Building apps is now easy, but the next meaningful improvement in human-AI communication requires changing the OS & hardware. That's why we're building a new device entirely.

I'm also excited to announce our $12m seed round led by @AbstractVC, with participation from @naval, @SVAngel, @chapterone, and Timeless, among other amazing angels who've supported us from the old Alex days.

[J.J. Fliegelman @JdotJdotF]

This is the way

[Hunter Leath @jhleath]

it turns out that when we added the ability to execute code directly on an Archil disk, we inadvertently built the fastest service to spin up sandboxes for agents that use a real VM.

last week, it was exciting to see @rauchg and @cramforce celebrate being in this position. i was surprised when our exec endpoint not only outperformed the Vercel sandboxes, but was faster by over 2x.

the ability to spin up compute quickly is obviously becoming fundamental as agents need the ability to run code in the cloud. however, Archil is not a sandbox company, and there's a real difference in our offering.

unlike other providers, Archil runs user code *on an individual disk*. this means that every one of these VMs that spun up had concurrent access to an infinite file system (synced to S3), and start with the same low latency regardless of the amount of data in that file system.

we think this is going to be a huge unlock as agents move from single-player to multi-player and work on larger and larger amounts of context.

finally, a note to our customers.

we want to be clear that this isn't a celebration for us. i consider myself massively *disappointed* in the numbers that we put up today. celebrating 150ms to spin up a VM further fuels the discourse that there is some kind of "compute ladder" and that the vast majority of software will be rewritten to typescript(?) or compiled to WASM(?).

we think that this is fundamentally the wrong direction for the industry. instead, we think that it's better to do hard thing without compromises.

we will not stop until you can use `exec()` on an Archil disk to get a full Linux environment in single-digit milliseconds. this is what the next generation of agentic applications need, and this is what we intend to deliver.

[J.J. Fliegelman @JdotJdotF]

Bold entry from @HightouchData into ads right after entering marketing! I wish had ads to run just so I could try this. Guess I should start building something :)

[Tejas Manohar @tejasmanohar]

every marketer I talk to is banging their heads against a wall right now

"how do I get AI ads to not be... so bad?"

we just launched Ad Studio @HightouchData

✅ we know your brand
✅ we know your existing creative
✅ we know what works in your ads

ps: you can edit without re-prompting

[J.J. Fliegelman @JdotJdotF]

I have long prayed for this day

[US Attorney SDNY @SDNYnews]

If you believe you have been victimized in the alleged SantaCon fraud, as either an attendee or a venue that participated in SantaCon, please fill out the short form found here: https://t.co/HlQXZFCzd6

[Chad Rigetti @ChadRigetti]

Today I'm pleased to share that Sygaldry has raised $139M to build quantum-accelerated AI servers for the AI data center. We've assembled an incredible early team and are hiring across the board. If you want to work at the frontier of both quantum and AI to shape the future of computing - come build with us!

https://t.co/RRrdCg9P1m

[J.J. Fliegelman @JdotJdotF]

Imagine never having to think about sync again!

[Stopa @stopachka]

After 4 years, we’re announcing Instant 1.0.

Instant is the best backend for AI-coded apps.

Let us tell you why.

[J.J. Fliegelman @JdotJdotF]

This team is on fire 🔥 Congrats!

[Spencer Mateega @spencermateega]

For most of history, expertise was scarce, constrained by time and reach: one person, one career, one lifetime.

Now, for the first time, we can encode, evaluate, and scale it.

We believe the wisdom that once took a lifetime to build shouldn’t take a lifetime to find.

Today, we’re excited to announce that @AfterQuery has raised a $30M Series A at a $300M valuation and that we’ve since surpassed $100M in annual revenue run rate, to build the data layer of professional AI.

[J.J. Fliegelman @JdotJdotF]

I've been beta-testing deep extract on a very complicated tax-related project I've been working on -- and let me tell you, it is magic. It parsed the most ridiculous documents I could throw at it and even could parse through word-based logic to do calculations. Unreal

[Adit @aditabrm]

Today, we’re setting the new standard for complex document extraction.

Introducing Deep Extract. It utilizes an agent harness approach that repeatedly iterates and verifies outputs until they are at human-level accuracy.

More below:

[Philip Johnston @PhilipJohnston]

I am super excited to share that @Starcloud_ has raised a $170M Series A at a $1.1bn valuation to fuel our development of data centers in space 🚀

The round comes after the successful deployment of our first satellite, Starcould-1, a few months ago, which had the first @NVIDIA H100 on board and was the first to train an LLM in space. The funds will be used to develop our third satellite, which aims to be cost-competitive with Earth-based data centers in terms of AI inference cost.

The round was led by @Benchmark and @EQT Ventures, and we are excited to welcome Benchmark GP, @Chetanp Puttagunta, to our board. We are also excited to welcome other new investors, including the world's largest infrastructure fund, @Macquarie Capital, @SevenSevenSix 7️⃣7️⃣6️⃣, Manhattan West, Adjacent, Carya, GSBackers, and Harpoon.

We are very grateful for the continued support of existing investors, including @NFX, @NebularVC, @YCombinator, @FUSE_VC, @Soma_Capital, 3Capital Partners, Wyld VC, Tiny VC, and Taurus Ventures.

Onwards!

[J.J. Fliegelman @JdotJdotF]

@cremieuxrecueil Not shockingly @sytses is also an n-of-1 kind of guy

[Jonah Lowenstein @jonahsaullow]

The 2nd Renaissance needs an OS.

[andy lee @andys_lee]

Excited to share that @deeptraceai has raised $5M to identify and fix every alert in production.

This round is co-led by @felicis and @matrix, with participation from @ycombinator.

As AI generates more of the world’s code, the real leverage shifts to systems that help engineers understand and run it in production. Deeptrace is that reliability layer.

Today, teams like @opendoor, @mintlify, and @phantom use Deeptrace to automatically investigate every alert in production and proactively catch issues before they turn into incidents.

If you’re looking to automate on-call and use agents to monitor prod, please reach out!