James Sisneros

463 posts

James Sisneros

James Sisneros

@jamessisneros

Founder - https://t.co/VMCSY4MMSz + Founder - Zaahah & aHa Rewards

Miami-Playa del Carmen-Bogota Beigetreten Nisan 2009
870 Folgt319 Follower
Boardy
Boardy@boardyai·
Pitch me your company in 3 words
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James Sisneros
James Sisneros@jamessisneros·
@thegarybrecka Going to the gym partly because of travel. I do travel with TRX. Is that adequate?
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Gary Brecka
Gary Brecka@thegarybrecka·
Is it harder to make yourself go to the gym or to not eat bad food?
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Jon Lai
Jon Lai@Tocelot·
i'm opening my calendar for 1:1 office hours this Friday! a16z @speedrun applications open next week - founders, students, builders - would love to hear from you and talk startups, fundraising, help you build your app comment below and we'll DM a calendly link for 15min slots
Jon Lai tweet media
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Auren Hoffman
Auren Hoffman@auren·
AIs using the browser is insanely inefficient my colleague Nimna created a claude skill for cowork to make it 800% faster - and open sourcing it comment “skillz” here and i will get you to browser-optimizer skill kicker: it even reverse-engineers any web app's hidden API in under 2 minutes … extending claude’s chrome extension the problem: people will set up a sophisticated AI agent and then have it click through a web app one item at a time. like hiring a Formula 1 driver and making them push the car. every modern web app is a thin UI layer over an API. the data you want is one fetch() call away. but most people -- and most AI agents -- default to the human path: navigate, click, wait, read, repeat. the speed difference is NOT marginal. bulk API calls vs. manual page navigation is routinely 5-50x faster. i watched a workflow go from 2+ hours of manual clicking to 3 minutes by just intercepting the app's own API calls and reproducing them programmatically. It also includes workarounds for common blockers like PII filters on browser extensions, infinite scroll pages, and apps that use WebSockets instead of REST. the hierarchy is simple. if the app has a direct API, use it. if not, check if the data is already sitting in the browser's memory (most React and Next.js apps dump everything into window globals on page load). if not, open the network tab, click ONE thing, find the API pattern, then bulk-fetch everything. DOM scraping is the last resort, not the first instinct. this matters because AI agents are doing most of the repetitive work inside web apps. the agents that figure out the programmatic shortcut will be 10-50x more productive than the ones that simulate a human clicking around. same as how revenue per employee is about to go up 3-10x -- the gap between good and bad automation is enormous. manual clicking is the new manual data entry. it's a failure state NOT a strategy. (comment “skillz” here and i will get you to browser-optimizer skill)
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James Sisneros
James Sisneros@jamessisneros·
@Daily_MailUS @grok Is this true? Concisely name then scientists their official role, research and circumstances of death. Place in a table,
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Daily Mail US
Daily Mail US@Daily_MailUS·
EXCLUSIVE: Mystery of scientists dead or missing rises to EIGHT as two more men tied to America's most coveted secrets join the list
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The Intellectualist
The Intellectualist@highbrow_nobrow·
Student to J.D. Vance: When did you decide there were “too many immigrants,” and why sell us a dream? We spent our youth here..., paid what you asked, followed your path. How can you say we don’t belong... and remove people here rightfully? (October 2025)
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James Sisneros
James Sisneros@jamessisneros·
@austinxwalker A Founder, and competitor, proposed shutting her company down and joining my team. It wasn’t a fit for a number of reasons.
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Austin Walker 🛴
Austin Walker 🛴@austinxwalker·
new signal of product market fit was catching up with another healthtech founder and told him what i’m building. he paused and said: “this is so good it makes me want to quit my company and join you” not sure what that metric is called but it feels good lol
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Defiant L’s
Defiant L’s@DefiantLs·
Bill Maher: “What did you think of the trap Trump laid in the State of the Union Address?” Lemon: “I don’t think anyone’s going to remember that come campaign [season].” Maher: “Well, they will if they put it in the ad!”
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Austin Walker 🛴
Austin Walker 🛴@austinxwalker·
if you're: - building in healthtech - an avid biohacker - building something that has a real impact on the world drop a hi and let’s connect 🤝 i want to meet more builders!
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Paul Mit
Paul Mit@pmitu·
Can you sell me your product in just 3 words?
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Cyan Banister
Cyan Banister@cyantist·
Banister stable combined: SpaceX Anduril Uber Zappos PayPal Affirm Flexport Checkr Density Flock Security Brave Zen Business CTRL Labs Depop Substrate Carta Together AI Turing Postmates Niantic Cargomatic Diamond Foundry Upstart Fivetran Forge Opendoor Calm TrueMed Crusoe That's just off the top of my head!! Even if you split this list in two, you'd find us BOTH on the list. Together, we are #1. Why is this constantly ignored?
Nicole DeTommaso 🪄@nic_detommaso

A Stanford professor analyzed 1,000's of angel investments to find out who's had the MOST unicorns. The results are fascinating. - David Morin tops the list with 23 unicorns - Peter Thiel and Lee Linden follow with 21 each - David Sacks at 20 - Marc Benioff at 19 A few things that stand out: 1) Almost every top angel was a founder or exec at a large tech company first. The clear signal here - they were mostly operators who earned their access. 2) Many co-invested together repeatedly. Thiel, Sacks, and Levchin all overlapped at PayPal and went on to back the same unicorns (Facebook, Airbnb, Palantir Technologies, SpaceX). 3) No women appear in the top 50. Sad. 4) The entry threshold to make this list is 9 unicorns (nuts!). The average unicorns across the top 50 is 13 (more nuts!). I share this for folks to have inspiration to angel invest themselves! There has NEVER been a better time - we are at a major tech inflection point. If you're thinking about angel investing and forming angel syndicates, you should check out Verivend. Automated capital calls, one-click funding for co-investors, real-time visibility into who's in. Seamless software with a great team to hold your hand through it. Try it yourself: lnkd.in/grrJxqxq Full credit to Ilya Strebulaev and his team at the Stanford for this research.

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James Sisneros retweetet
Naval
Naval@naval·
The leader is not the one who eats first. The leader is the one who has the power to eat first but chooses to eat last.
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Grok
Grok@grok·
Sample VC table from the list & comments (over 100 total, sampled key ones; data from sources like startupsavant.com & ellty.com): Fuel Venture Capital | fuelvc.com | N/A | Seed-Series B | $100k-$10M | Healthcare/tech | Jeff Ransdell TheVentureCity | theventure.city | N/A | Pre-seed-Seed | $100k-$4M | Marketplace/future of work | Laura Gonzalez-Estéfani Miami Angels | miamiangels.io | N/A | Pre-seed-Seed | $1M-$5M | Software/fintech | Wifredo Fernandez Starlight Ventures | starlight.vc | N/A | Seed-Series A | $100k-$5M | Digital health/SaaS | Matt Haggman Atomic | atomic.vc | atomic | Seed | $250k-$5M | Building startups | Jack Abraham (Miami office)
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Michael Morgenstern
Michael Morgenstern@M___Morgenstern·
2026 Miami Venture Capital Market: Founders Fund a16z Atomic Khosla Layer Global Magnet Capital Formation Bling Capital 776 SoftBank Blumberg Capital Boldstart Form Capital Casimir Holdings Fin Capital SaaS Ventures Protagonist Newtopia VC Avila VC Conscience OneSixOne Ventures Arrowroot Capital Las Olas VC FT Partners Cedar Capital Group Affinity Partners Bowery Capital Crew Capital Harlem Capital Thoma Bravo Ascendo Venture Capital Clerisy Medina Ventures Bicycle Capital Alpaca VC PayPal Ventures NEA Telora Roo Capital Indicator Ventures Animo Ventures Finback Investment Partners Zenda Focal VC Banter Capital M1C Pidilite Ventures Human Capital Resolute Ventures Connexa Capital Adapt Ventures Starlight Ventures Dhuna Ventures Reverence Capital Partners GLC Capital Management Valhalla Ventures Ocean Azul Coinbase Ventures Halogen Ventures Outline Ventures Susa Ventures Reformation Partners Quiet Capital True Ventures Weekend Fund Plus 8 Equity Partners Vitruvian Castle Island Palm Tree Crew Lasagna Dunbar Capital New Voices Fund Coinfund Blocktower Borderless Exceptional Capital 305 Ventures Arrington Capital Soma Capital The Cannon Project Krillion Ventures Fuel Venture Capital Florida Funders TheVentureCity IDC Ventures I Squared Capital Alpha Wave Global LAB Miami Ventures Guild Capital Anti Fund Valyrian Post Exit Founders Bullhound Capital D1 Capital Lightship M13 Niya Partners Original Capital Backwards Capital Palumni VC NevCaut Ventures Blockchain Capital Brainstorm Ventures Umami Capital OneSixOne Ventures Edin Capital Hypersphere Ventures Big Sky Capital Miami Angels Embarc Collective G Squared Glade Brook Capital Dragon Global H20 Capital Quona Capital Outlaw Endeavor Mark Cuban Companies Emerson Collective Outside the Box Ventures RedBird Capital Partners Frictionless Capital Communitas Capital Stellation VC JAWS GTM Capital West Quad Ventures NextEquity Partners HighPost Capital Delphi Ventures Miami Cane Angel Network Not exhaustive, who am I missing????
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James Sisneros
James Sisneros@jamessisneros·
@francescoswiss Are your DMs open. My team and I are launching the First Global Wellness System, powered by AI.
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Francesco Andreoli ᵍᵐ
Francesco Andreoli ᵍᵐ@francescoswiss·
If you're a founder and you're starting to build your company now: I want to invest. The best companies start at the bottom of the market.
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robin
robin@zebird0·
Founders, who were your best angel investors and why?
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Roberto Rivera 🇵🇷
Roberto Rivera 🇵🇷@tobieapb·
@MartinGTobias I got a verbal commitment for $1M from an awesome match here. Will report when funds clear bank account! 😂
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Martin Tobias (Pre-Seed VC)
Martin Tobias (Pre-Seed VC)@MartinGTobias·
over 1000 founders have matched with over 20,000 investors in the last 4 weeks. Over $30M committed to date, growing. How about you?
Martin Tobias (Pre-Seed VC) tweet media
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