Stealth Startup Spy #350
Ex-Beamery CEO enters stealth, Caltech ML researcher builds AI for lab protocols, & Ex-SpaceX engineer builds nuclear fuel conversion tech.
🚀 We just launched a new newsletter — Company Launch Tracker.
We’re tracking company launches as they happen and surfacing the most interesting new founders and startups (yes, all outside of this stealth activity too). If you want to stay ahead of the curve, this is where you’ll find them first.
Right now we’ve got 5 subscribers: my wife, my mom, and that high school buddy who won’t stop pitching me his app. Be smart like them and get in early 👇
We run a live feed inside Gravity that tracks founders entering stealth and companies quietly exiting it.
What you’re reading here is about 1% of the stealth activity we pick up. The full tracker updates in real time as things change and new activity emerges.
If you want earlier access to everything, book some time with us to stay ahead.
In this issue of the Stealth Startup Spy, here is what we will uncover:
Co-founder and former CEO of HR Tech unicorn Beamery enters stealth
Caltech machine learning researcher is building an AI system that turns plain-English experiment descriptions into validated, lab-ready protocols
Former Google Health/Nest and SoFi design VP enters stealth
Former SpaceX automation and controls engineer is building modular nuclear fuel conversion technology to secure the U.S. nuclear fuel supply chain
Former Meta engineer and Chicago Booth MBA enters
And more…
Now let’s shine the spotlight… 💡💡💡
🕵️♂️Founders Coming Out of Stealth
Real-time updates from founders who debut what they’ve been working on under stealth mode
Arthur De Los Santos - Co-Founder, CTO at Rindler
FounderDNA: Technical Founder, Top 10 University
Prior Experience: Advanced Undergraduate Researcher at MIT CSAIL, Autonomous Robotics Engineering Intern at Telexistence
Connect on: LinkedIn
Rindler (YC S26) turns any website into a deterministic API that AI agents can reliably call.
HQ: Boston, Massachusetts, United States
Industry: Developer Tools, AI Infrastructure
Time Spent in Stealth Mode: 8 Months
Sam Flood - Co-Founder, CTO at Sublime Nuclear
FounderDNA: Serial Founder, Technical Founder
Prior Experience: Automation and Controls Engineer at SpaceX, Chief Executive Officer at SSFlood Engineering, Head of Engineering at Critical Energy, R&D Engineer at Pipeline Medical Technologies
Connect on: LinkedIn
Sublime Nuclear is modernizing and modularizing the nuclear fuel conversion process to secure the domestic nuclear fuel supply chain.
HQ: Los Angeles, California, United States
Industry: Nuclear Energy, Industrial Technology | Team Size: 2
Time Spent in Stealth Mode: 5 Months
Leon Mojarrabi - Co-Founder at Gutgutgoose
FounderDNA: Serial Founder, Technical Founder
Prior Experience: Founder at Fireside Tuition, GTM Engineer at Go1, Lead Go-to-Market Consultant (ANZ) at Toddle
Gutgutgoose is a personalized microbiome company that sequences gut DNA to predict which probiotic strains will actually colonize, rather than offering one-size-fits-all formulas.
HQ: Australia
Industry: Microbiome Health, BioTech | Team Size: 2
Time Spent in Stealth Mode: 1 Year 6 Months
Troy Zhang - Co-Founder at Infera
FounderDNA: Top 10 University, Technical Founder
Prior Experience: Machine Learning Intern at Caltech, Research Fellow at Sylvester Comprehensive Cancer Center
Co-Founder: Chloe Sow | Email (Harvard Mechanical Engineering and Computer Science)
Infera converts plain-English experiment descriptions into validated, instrument-ready protocols for existing lab equipment, handling vendor scripts, data, inventory, and institutional knowledge along the way.
HQ: San Francisco, California, United States
Industry: Lab Automation, BioTech Software | Team Size: 2
Time Spent in Stealth Mode: 9 Months
Mary H. - Founder at Magic Blocks
FounderDNA: Serial Founder, Technical Founder
Prior Experience: Sr. Director, Program Management Office at Peloton Interactive, Founder Fellow at Primary Venture Partners, Head of Commercial at Luminary, Release Manager at 1stdibs.com
Connect on: LinkedIn
Magic Blocks gives integrators and OEM sales teams a single place to search, spec, and shortlist products, powered by AI that understands how automation systems are built.
HQ: New York, New York, United States
Industry: Sales Enablement, Industrial AI
Time Spent in Stealth Mode: 4 Months
🕵️♂️Key Talent Going Under Stealth
Illuminating clues left behind by world class talent and influential innovators who just went into stealth mode
Patrick Gartlan - Founder at Stealth AI Startup
FounderDNA: Serial Founder, Technical Founder, Top 10 University, Prior Exit
Prior Experience: VP Product at Flexera, Founder & CEO at StratCloud (acquired by Spot.io), CTO at CloudCheckr (acquired, General Manager, FinOps at NetApp
Connect on: LinkedIn
HQ: Fairfax, Virginia, United States
Time Spent in Stealth Mode: 9 Months
Sultan Murad Saidov - Founder at Stealth
FounderDNA: Serial Founder, Masters Degree
Prior Experience: Co-Founder, President & CEO at Beamery (HRTech unicorn), Commodities Trader at Goldman Sachs, Co-Founder & CPTO at seed.jobs, Founder & CEO at Nite Bite
Connect on: LinkedIn
HQ: London, England, United Kingdom
Time Spent in Stealth Mode: 6 Months
Alley Bellack - Co-Founder at Stealth Startup
FounderDNA: Serial Founder, Technical Founder, Masters Degree, Former FAANG, Top 10 University
Prior Experience: MBA & MS at University of Chicago Booth School of Business, Software Engineer at Meta, Software Engineer at Lyra Health
Connect on: LinkedIn
HQ: San Francisco, California, United States
Time Spent in Stealth Mode: 2 Months
Max Attias - CEO and Co-Founder at Appcito
FounderDNA: Technical Founder
Prior Experience: Chief Technology Officer at Nuvei, CIO and Site Manager for Bank Yahav at Tata Technologies, COE Israel Site Manager at Barclays
Connect on: LinkedIn
HQ: Israel
Time Spent in Stealth Mode: 3 Months
Lauren Von Dehsen - Co-Founder at Stealth Startup
FounderDNA: Former FAANG
Prior Experience: VP, Design & Research at SoFi, Senior UX Manager, Google Health & Nest at Google, Experience Design Director at R/GA
Connect on: LinkedIn
HQ: United States
Time Spent in Stealth Mode: 3 Months
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Stay Stealthy,
Drake
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Stealth Startup Spy is a data-driven newsletter for investors, journalists and tech enthusiasts interested in uncovering the next big move for key talent, real-time stealth company launches and technology advancements not in plain sight. We leverage the technology built at Gravity to shine a light on the hidden world of stealth startups.