FirstMark @FirstMarkCap
Early-stage venture capital firm based in New York City. firstmark.com New York, NY Joined November 2009-
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2025 has been a wild year for AI video. My conversation with @c_valenzuelab, CEO of @runwayml: 00:00 – Meet Cris and Runway – AI Video's Wild Year 01:48 – Runway's AI Film Festival Goes From Chinatown To IMAX 04:02 – Hollywood's Shift: From Ignoring AI To Adopting It At…
Thank you for 10,000 stars and 100 contributors — on the same day! We're excited to continue building a next-generation open-source stack for LLM applications. Find us on GitHub ↓
Today in ‘VCs congratulating portfolio companies but really congratulating themselves’: major kudos to @dataiku, @clickhouse and @synthesiaIO for being nominated to the Forbes #cloud100 list
Another record-breaking stretch at @synthesiaIO: - Crossed $100m ARR in early April 2025 - Doubled revenue YoY (Growth accelerated to 100% from 80% at Series D) - Hit 142% NRR (up from 119% a year ago) - Quadrupled our $100K+ customer base in 12 months - Trusted by +80% of…
running a nyc gp search has been a reminder of how far the ecosystem has come. oai, cursor, thrive all in soho, flatiron still a gem for tech. city feels white hot right now. 6x growth in active vc firms since 2010 (2+ direct seed or series a investments) isn’t just noise, it’s…
The 23-time Grand Slam winner opens up about her decision to go on the weight management drug. vogue.com/article/serena…
Serena Williams has been taking a GLP-1 medication to help with her recent weight loss, she revealed for the first time in an exclusive TODAY interview. today.com/health/womens-…
@serenawilliams is on Ro! There are few people in the world with more willpower than Serena. She trained hard after having kids but her body didn’t respond the same way. She turned to Ro to reach her goals. youtube.com/watch?v=_MAYsc…
1/ @serenawilliams is our newest ambassador at @ro. She’s sharing her weight loss story to inspire others. She has more willpower than most people on the planet and is the perfect example that weight is not just a matter of “diet and exercise”.
AI agents now get memory that’s real-time, secure, and structured. SurrealMCP connects your AI tools to SurrealDB with zero glue code. Run locally, on-prem, or in SurrealDB Cloud. Learn more. 👉 sdb.li/4mrS88H
How to build a beloved AI product, with @meetgranola CEO @cjpedregal Granola is the rare AI startup that slipped into a very crowded niche — meeting notes — and still managed to become the product founders (and VCs!) rave about. Plenty of product lessons in this episode.…
Come join us for a special evening with HashiCorp Cofounder & CTO @armon and our friends at @Georgian_io as we dive into the future of AI & Infra 🚀 Apply to join below! Cc @DavidWaltcher lu.ma/s2hh8snr
Thrilled to (finally) announce our partnership with the inimitable @gabrielbianconi, @thebigmehtaphor & the entire @TensorZero team We've come a long way from the days when the website was just a floating 0 & the OSS launch was on the horizon, but it's been incredible to see the…
Thrilled to (finally) announce our partnership with the inimitable @gabrielbianconi, @thebigmehtaphor & the entire @TensorZero team We've come a long way from the days when the website was just a floating 0 & the OSS launch was on the horizon, but it's been incredible to see the…
Thrilled (and humbled, lol) to be involved here. Been thinking about feedback loops in AI forever and those guys are the real deal - @gabrielbianconi and @thebigmehtaphor
Thrilled (and humbled, lol) to be involved here. Been thinking about feedback loops in AI forever and those guys are the real deal - @gabrielbianconi and @thebigmehtaphor
TensorZero nabs $7.3M seed to solve the messy world of enterprise LLM development venturebeat.com/ai/tensorzero-…
Excited to share that we've raised a $7.3M seed round! "What will LLM engineering look like in a few years?" Viraj and I started building TensorZero last year after asking ourselves this question. Today, we're building an open-source stack for industrial-grade LLM…
Excited to share that we've raised a $7.3M seed round! "What will LLM engineering look like in a few years?" Viraj and I started building TensorZero last year after asking ourselves this question. Today, we're building an open-source stack for industrial-grade LLM…
Gabriel and I started this business programming in a tiny office for a year straight. We started with the idea that AI systems must be able to learn from real-world experience to solve real-world problems. Eventually it became clear that this was much more of a systems and data…
Gabriel and I started this business programming in a tiny office for a year straight. We started with the idea that AI systems must be able to learn from real-world experience to solve real-world problems. Eventually it became clear that this was much more of a systems and data…
Announcing our $7.3M seed round! TensorZero enables a data and learning flywheel for optimizing LLM applications: a feedback loop that turns production metrics and human feedback into smarter, faster, and cheaper models and agents. Today, we provide an open-source stack for…
"The IPO window is open and we're advising companies to go public." @rick joined @ScottWapnerCNBC on Closing Bell recently to share his views on the state of IPO market and why we're in for an incredibly exciting second half to the year. ⬇️
Excited to see @rick, @derek_chu, and @kathrynweinmann featured as top VCs investing in the creator economy. We couldn't be more excited about backing the next generation of iconic creator companies, including @synthesiaIO, @shoponpickle, @poshvip_ and more!…
Matt Turck @mattturck
124K Followers 2K Following VC at @FirstMarkCap. I'm a VC, so of course I have a podcast: https://t.co/Usnenl0zfI
Nicole DeTommaso 🪄 @nic_detommaso
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Rex Woodbury @rex_woodbury
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Caroline Casson @carolinecasson_
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jess lozano schmitt @JessLozanoS
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Zarathustra 🏔️ @liberatioli
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Ali Usman – Founder... @Ali_wecommerce
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Search Cloud One @searchcloudone
246 Followers 1K Following Search as a Service. #Search #cloud. We love everything in the cloud - the sky is not the limit 🚀 #eSearchPro #AI #saas #sitesearch #WordPress
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Polat Efe Kaya @PolatEfeK
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Rob McMahon 🚀🇺�... @RobMcMa34474479
430 Followers 2K Following Husband & Father of 2 Founder & CEO @ https://t.co/R3ZuVtj1pY Co-Founder & CEO @ Infinite Data Solutions Aspiring Guitarist, Golfer, & Physics Nerd, etc.
AVV @avv_co
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Yoni Nachmany (he/him... @YoniNachmany
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Harry Stebbings @HarryStebbings
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Jason ✨👾SaaStr.A... @jasonlk
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Jenny Fielding @jefielding
40K Followers 3K Following Managing Partner, @EverywhereVC investing in pre-seed founders building the future of money, health and work 🚀
Tweets from Zach Wein... @zachweinberg
75K Followers 423 Following I do healthcare & tech stuff. Founder of https://t.co/uJTXjZVNJt, Flatiron Health (acq @Roche~$2b) & Invite Media (acq @Google~$81m). Invest @ https://t.co/2D00yW2Be4
logan bartlett @loganbartlett
63K Followers 897 Following md @redpoint / I have a podcast @loganbartshow / mostly tech with some vols, knicks and hip hop tweeting mixed in
martin_casado @martin_casado
68K Followers 3K Following GP @ a16z ... questionable heuristics in a grossly underdetermined world
Alex Konrad @alexrkonrad
86K Followers 4K Following Founder and editor of @upstartsmediaco, a new tech publication focused on the startup ecosystem. Previously @Forbes senior editor. Email: [email protected]
sarah guo @saranormous
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Lisa Xu @lisamxu
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Serena Williams @serenawilliams
10.2M Followers 369 Following Tennis Player turned VC Investor @SerenaVentures founder & entrepreneur
Beth Viner @bviner
685 Followers 226 Following Partner and Head of Platform @FirstMarkCap; @bcg, @kickstarter and @IDEO alumni, early bird, book lover, abandoner of high heels for sneakers
VentureBeat @VentureBeat
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Business Insider @BusinessInsider
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Vera @vverawang
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The Information @theinformation
120K Followers 704 Following The most authoritative publication covering tech that high-powered tech execs and founders read daily. TITV M-F at 1 ET: https://t.co/M0NywExhuj
LM Studio @lmstudio
38K Followers 121 Following Download and run local LLMs on your computer 👾 https://t.co/e2E0DLMFJ5
TensorZero @TensorZero
1K Followers 2 Following open-source stack for industrial-grade LLM applications ⤷ gateway · observability · optimization · evaluation · experimentation
Viraj Mehta @thebigmehtaphor
632 Followers 490 Following cofounder and cto @tensorzero. previously did a PhD at CMU doing sample efficient reinforcement learning for tokamaks and math and cs @stanford before that
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CNBC's Fast Money @CNBCFastMoney
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Michael Rubenstein @mrubenstein99
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Sparta @SpartaCommo
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Arnav Bimbhet @abimbhet
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jamiegoldstein @jamieagoldstein
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Jefferies @Jefferies
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JJ @Joseph_Jacob13
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