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San Francisco
Joined May 2007
SignalFire retweeted
Convergence: RL Summit is just a week away and spots are RUNNING OUT FAST. To that end, we are going to host a 3 mile run the day before along the Embarcadero to get our systems ready. Register here, and link in comments for the main event! luma.com/rl-rollout
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Congratulations @kevinweil, @dpatil, @manohar_paluri, and Solomon Reisberg on this huge milestone! We're proud to back this exceptional team solving such a critical problem. 🙌
💥 Introducing Warp Sciences, a new company applying AI and robotics to help the world develop new medicines faster. We’ve raised a $215M Series A led by @lightspeedvp to bring frontier AI out of the browser and into the lab, and build scientific capacity here in America. I co-founded Warp with my long-time friend @dpatil, FAIR co-founder @manohar_paluri, and drug hunter Sol Reisberg. The early team is full of incredible people like @bkspears9, who helped achieve Q>1 fusion at LLNL.
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This round also welcomes @justinmateen to our board of directors. Justin is a wonderful person and razor sharp investor. He has singlehandedly introduced us to 100s of the highest quality people on the planet. He joins myself, @paoloardoino, @jawedkarim, @czoub3, and a few other institutional investors. I would like to specifically mention how much we appreciate our other institutional investors – in order of when they invested: @peterthiel @insightpartners, A*, @SignalFire, @BCV, and @tether More soon. Onwards 🤘
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SignalFire retweeted
This team is the embodiment of relentless customer focus. 8pm on a Friday: Steven and Cameron running an ad hoc all hands to sprint on customer feedback from the day. Congrats to @cultured @czoob3 and the @whop team. Onward!
Whop has raised $200M in Series D funding at a $5.1B valuation, backed by @sequoia and @shopify. It really feels like we are barely touching the tip of the iceberg in a market larger than anyone can imagine. We first launched Whop as a better way for us to sell sneaker bots, one of the most niche types of desktop software out there. Total TAM? Probably $20,000 per day. Who cares, tiny market. But, what people discounted is the idea that there were actually 70,000 other markets exactly like that one. Beyond the investment itself, I am especially excited to welcome legendary silicon valley investor @dougleone to our board of directors. Doug and the sequoia team are nothing but a brilliant, resourceful, and principled group of people. My co-founder Cameron and I started building on Shopify when we were 13 years old. Shopify is one of the most impactful all-in-one cloud ecosystems ever created; @tobi has pioneered modern entrepreneurship the way we know it and we are thrilled to have him in our corner. We have a tenet at Whop to be the dumbest in the room and I am very grateful that this has recently become a lot easier. We are focused on markets, scale economies, and progressive media. If that is up your alley, please message me directly. The $200M raised will support our expansion as we build economic infrastructure for the next century, continuing on our mission of delivering everyone an income.
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SignalFire retweeted
We looked at TerminalBench 4.0 and found a lot of issues. After fixing the issues Sonnet 5.5 scores 89.2%. So, TerminalBench is already mostly saturated. Along the way we found a lot of crazy stuff, including reward hacks in the published transcripts.
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went to one of the coolest tech parties in sf! 🎉🐒 thanks @JoshConstine and @signalfire for the invite and for curating a incredible time!!
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A text token works for any LLM, but a demo on one robot arm may be useless on another. @RyanMWexler explains why physical AI needs its own data playbook. 👇
Is the open web tapped out for AI training?In our latest episode with @SignalFire investor @RyanWexler, we break down: 🔹 Shift from scale to hyper-specificity in post-training data 🔹 Phase 2 data strategies: selling to frontier labs vs. keeping data internal 🔹 The economics of robotics training data & teleop 🔹 Why physical AI needs its own evaluation frameworks #StartupStrategy #AIFounders #PostTraining #DataMarket #DeepTech #SignalFire 🎧 Catch the full episode: youtu.be/RoRJNv90iMQ?si=HASf…
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If you haven't already RSVPed to our @TechCrunch Disrupt Afterparty, here's the link: luma.com/signalfire-arthaus
Once a year we host a love letter to SF’s tech scene: our TechCrunch Disrupt afterparty Live dance music from a 200M stream artist. Epic installations. The good people. We had 4K RSVPs last year so giving early access to friends here. Comment and I'll DM you the invite!
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We're LIVE at 12 PM central with @chriswfarmer, Founder & CEO of @SignalFire. He started SignalFire in 2013 on a simple idea: use data to find startups before everyone else does. Now it manages about $3B with titans such as Grammarly and Alchemy in the portfolio. Catch him at 12 PM central! Live link to watch in comments.
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Models cheat. They launch fork bombs, read the answer key, and crash the grader. @PreferenceModel builds RL environments where none of that works. Today they're out of stealth with a $16M seed led by @a16z, and we're proud to back Ning Cao and Jennifer Zhou (@chem_safety). They're hiring!
Today we are open-sourcing 🥕Karotte, our framework for building RL environments. We've used it for the past year to build MLE RL environments for frontier labs, and it's been hardened through 1M+ evaluation runs and red-teaming.
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Are you coming to the tech party that doesn’t feel like a tech party?
Once a year we host a love letter to SF’s tech scene: our TechCrunch Disrupt afterparty Live dance music from a 200M stream artist. Epic installations. The good people. We had 4K RSVPs last year so giving early access to friends here. Comment and I'll DM you the invite!
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Insurance software is famously disliked by the brokers who use it. @OutmarketAI is the exception: 300+ agencies, 10K+ daily users, and brokers who actually rave about it. @signalfire is leading their $34.5M Series B, just months after their $17M Series A. techcrunch.com/2026/09/28/in…
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We’re hosting Convergence: RL Summit with @terac on Oct 29 in SF — bringing together researchers, founders & operators from @GoogleDeepMind, @databricks, @mercor, @arena, @joinHandshake, @turingcom, @deeptuneai, @contra, @Stanford, @Princeton, @UCBerkeley, and more. Research, industry insight, live Q&A, and open panels about where RL goes next. Register here: terac.com/events/convergence…
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I sleep better knowing @SnehalAntani exists. Today he raised $250M at $2B after @SignalFire led the Seed, A, & B. As JSOC's CTO, he fought terrorists who adopted AI faster than us. So he built @Horizon3ai to autonomously test and fix your defenses. Thanks for protecting us all
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Careful with headlines about AI killing engineering jobs. We are still super early, and the truth is nobody knows anything. A new @SignalFire study shows engineers are now 55% of all hires at big tech, up from 46%. Meanwhile new grad hiring fell off a cliff, down roughly 65%.
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SignalFire retweeted
July 19th, @LiliLanXin hosted a Women Founder's Tea Party @ SF Rotunda. We were beyond happy to sponsor this lovely event, alongside with @SignalFire and GlobalCitizens Law firm - and also have our very own ladies sent to co-host the event! ( @Elli3Kim ) Women Building, and Building Women's Spaces.🍊 Thank you to @jomanaesq, @thatmimido and @su_adeline_k for co-hosting. ⋆.ೃ࿔🌸*:・ #sf #womenintech
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Most AI agent teams keep the output and delete the part that actually matters: the trajectory. Every tool call, dead end, and piece of reasoning behind an agent's answer is more valuable than the answer itself for monitoring, security, audits, and training data. New piece from @RyanMWexler: signalfire.com/blog/save-ai-…
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All of tech hiring is down 25% since 2019. But it's sales and designers, not engineers, getting cut. No one wants new grads or middle managers. Everyone's recruiting for "Super IC" roles. Those and more huge findings in our new State Of Talent report:
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